CN113913318B - Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof - Google Patents
Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof Download PDFInfo
- Publication number
- CN113913318B CN113913318B CN202011495870.2A CN202011495870A CN113913318B CN 113913318 B CN113913318 B CN 113913318B CN 202011495870 A CN202011495870 A CN 202011495870A CN 113913318 B CN113913318 B CN 113913318B
- Authority
- CN
- China
- Prior art keywords
- salmonella
- salmonella typhimurium
- mutated
- mutation sites
- sal17241
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000035772 mutation Effects 0.000 title claims abstract description 43
- LISFMEBWQUVKPJ-UHFFFAOYSA-N quinolin-2-ol Chemical compound C1=CC=C2NC(=O)C=CC2=C1 LISFMEBWQUVKPJ-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 241000293869 Salmonella enterica subsp. enterica serovar Typhimurium Species 0.000 title claims abstract description 32
- 239000003814 drug Substances 0.000 title abstract description 46
- 229940079593 drug Drugs 0.000 title abstract description 42
- 241000607142 Salmonella Species 0.000 claims abstract description 53
- 206010059866 Drug resistance Diseases 0.000 claims abstract description 25
- MTCFGRXMJLQNBG-UHFFFAOYSA-N Serine Natural products OCC(N)C(O)=O MTCFGRXMJLQNBG-UHFFFAOYSA-N 0.000 claims abstract description 14
- COLNVLDHVKWLRT-QMMMGPOBSA-N L-phenylalanine Chemical group OC(=O)[C@@H](N)CC1=CC=CC=C1 COLNVLDHVKWLRT-QMMMGPOBSA-N 0.000 claims abstract description 12
- 239000004475 Arginine Substances 0.000 claims abstract description 9
- ODKSFYDXXFIFQN-UHFFFAOYSA-N arginine Natural products OC(=O)C(N)CCCNC(N)=N ODKSFYDXXFIFQN-UHFFFAOYSA-N 0.000 claims abstract description 9
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000012216 screening Methods 0.000 claims abstract description 8
- CKLJMWTZIZZHCS-REOHCLBHSA-N aspartic acid group Chemical group N[C@@H](CC(=O)O)C(=O)O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims abstract description 7
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Natural products OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 108090000623 proteins and genes Proteins 0.000 claims description 32
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 claims description 12
- 244000005700 microbiome Species 0.000 claims description 6
- 239000003242 anti bacterial agent Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000000813 microbial effect Effects 0.000 claims description 2
- 101150070420 gyrA gene Proteins 0.000 abstract description 27
- 101150012629 parE gene Proteins 0.000 abstract description 9
- 150000007660 quinolones Chemical class 0.000 abstract description 7
- 229940124350 antibacterial drug Drugs 0.000 abstract description 6
- 101150110811 parC gene Proteins 0.000 abstract description 6
- 235000003704 aspartic acid Nutrition 0.000 abstract description 5
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Chemical group OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 108010041052 DNA Topoisomerase IV Proteins 0.000 description 25
- MYSWGUAQZAJSOK-UHFFFAOYSA-N ciprofloxacin Chemical compound C12=CC(N3CCNCC3)=C(F)C=C2C(=O)C(C(=O)O)=CN1C1CC1 MYSWGUAQZAJSOK-UHFFFAOYSA-N 0.000 description 14
- 230000001580 bacterial effect Effects 0.000 description 13
- 239000002609 medium Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 9
- 238000012163 sequencing technique Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 102220535460 Interleukin-2 receptor subunit beta_S83F_mutation Human genes 0.000 description 7
- 238000012408 PCR amplification Methods 0.000 description 7
- 229960003405 ciprofloxacin Drugs 0.000 description 7
- 102220012991 rs111033344 Human genes 0.000 description 7
- 102200089579 rs786202787 Human genes 0.000 description 7
- GSDSWSVVBLHKDQ-JTQLQIEISA-N Levofloxacin Chemical compound C([C@@H](N1C2=C(C(C(C(O)=O)=C1)=O)C=C1F)C)OC2=C1N1CCN(C)CC1 GSDSWSVVBLHKDQ-JTQLQIEISA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 229960003376 levofloxacin Drugs 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229960003702 moxifloxacin Drugs 0.000 description 6
- FABPRXSRWADJSP-MEDUHNTESA-N moxifloxacin Chemical compound COC1=C(N2C[C@H]3NCCC[C@H]3C2)C(F)=CC(C(C(C(O)=O)=C2)=O)=C1N2C1CC1 FABPRXSRWADJSP-MEDUHNTESA-N 0.000 description 6
- MHWLWQUZZRMNGJ-UHFFFAOYSA-N nalidixic acid Chemical compound C1=C(C)N=C2N(CC)C=C(C(O)=O)C(=O)C2=C1 MHWLWQUZZRMNGJ-UHFFFAOYSA-N 0.000 description 6
- 229960000210 nalidixic acid Drugs 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 238000003786 synthesis reaction Methods 0.000 description 6
- 229920001817 Agar Polymers 0.000 description 5
- 239000008186 active pharmaceutical agent Substances 0.000 description 5
- 239000008272 agar Substances 0.000 description 5
- 239000000427 antigen Substances 0.000 description 5
- 108091007433 antigens Proteins 0.000 description 5
- 102000036639 antigens Human genes 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- 239000012634 fragment Substances 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 4
- 239000006916 nutrient agar Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 102000004190 Enzymes Human genes 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 3
- 206010064571 Gene mutation Diseases 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000004471 Glycine Substances 0.000 description 3
- 238000012300 Sequence Analysis Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 101150013736 gyrB gene Proteins 0.000 description 3
- 208000015181 infectious disease Diseases 0.000 description 3
- 230000001404 mediated effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002504 physiological saline solution Substances 0.000 description 3
- 239000013612 plasmid Substances 0.000 description 3
- 238000012070 whole genome sequencing analysis Methods 0.000 description 3
- XUCIJNAGGSZNQT-JHSLDZJXSA-N (R)-amygdalin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](O[C@@H](C#N)C=2C=CC=CC=2)O1 XUCIJNAGGSZNQT-JHSLDZJXSA-N 0.000 description 2
- KUWPCJHYPSUOFW-YBXAARCKSA-N 2-nitrophenyl beta-D-galactoside Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1[N+]([O-])=O KUWPCJHYPSUOFW-YBXAARCKSA-N 0.000 description 2
- 241000186146 Brevibacterium Species 0.000 description 2
- 238000009631 Broth culture Methods 0.000 description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 2
- SHZGCJCMOBCMKK-UHFFFAOYSA-N D-mannomethylose Natural products CC1OC(O)C(O)C(O)C1O SHZGCJCMOBCMKK-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- SQUHHTBVTRBESD-UHFFFAOYSA-N Hexa-Ac-myo-Inositol Natural products CC(=O)OC1C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O SQUHHTBVTRBESD-UHFFFAOYSA-N 0.000 description 2
- 108090000604 Hydrolases Proteins 0.000 description 2
- 102000004157 Hydrolases Human genes 0.000 description 2
- SHZGCJCMOBCMKK-JFNONXLTSA-N L-rhamnopyranose Chemical compound C[C@@H]1OC(O)[C@H](O)[C@H](O)[C@H]1O SHZGCJCMOBCMKK-JFNONXLTSA-N 0.000 description 2
- PNNNRSAQSRJVSB-UHFFFAOYSA-N L-rhamnose Natural products CC(O)C(O)C(O)C(O)C=O PNNNRSAQSRJVSB-UHFFFAOYSA-N 0.000 description 2
- 108010048581 Lysine decarboxylase Proteins 0.000 description 2
- 229930195725 Mannitol Natural products 0.000 description 2
- 102000052812 Ornithine decarboxylases Human genes 0.000 description 2
- 108700005126 Ornithine decarboxylases Proteins 0.000 description 2
- 102000004316 Oxidoreductases Human genes 0.000 description 2
- 108090000854 Oxidoreductases Proteins 0.000 description 2
- 241001138501 Salmonella enterica Species 0.000 description 2
- 229930006000 Sucrose Natural products 0.000 description 2
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 2
- 108010046334 Urease Proteins 0.000 description 2
- 229940089837 amygdalin Drugs 0.000 description 2
- YZLOSXFCSIDECK-UHFFFAOYSA-N amygdalin Natural products OCC1OC(OCC2OC(O)C(O)C(O)C2O)C(O)C(O)C1OC(C#N)c3ccccc3 YZLOSXFCSIDECK-UHFFFAOYSA-N 0.000 description 2
- PYMYPHUHKUWMLA-WDCZJNDASA-N arabinose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)C=O PYMYPHUHKUWMLA-WDCZJNDASA-N 0.000 description 2
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 2
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- DLRVVLDZNNYCBX-ZZFZYMBESA-N beta-melibiose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](O)O1 DLRVVLDZNNYCBX-ZZFZYMBESA-N 0.000 description 2
- 238000002815 broth microdilution Methods 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- YGHHWSRCTPQFFC-UHFFFAOYSA-N eucalyptosin A Natural products OC1C(O)C(O)C(CO)OC1OC1C(OC(C#N)C=2C=CC=CC=2)OC(CO)C(O)C1O YGHHWSRCTPQFFC-UHFFFAOYSA-N 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000009654 indole test Methods 0.000 description 2
- CDAISMWEOUEBRE-GPIVLXJGSA-N inositol Chemical compound O[C@H]1[C@H](O)[C@@H](O)[C@H](O)[C@H](O)[C@@H]1O CDAISMWEOUEBRE-GPIVLXJGSA-N 0.000 description 2
- 229960000367 inositol Drugs 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000594 mannitol Substances 0.000 description 2
- 235000010355 mannitol Nutrition 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000000877 morphologic effect Effects 0.000 description 2
- 239000013642 negative control Substances 0.000 description 2
- 239000013641 positive control Substances 0.000 description 2
- 229940072132 quinolone antibacterials Drugs 0.000 description 2
- 230000008261 resistance mechanism Effects 0.000 description 2
- CDAISMWEOUEBRE-UHFFFAOYSA-N scyllo-inosotol Natural products OC1C(O)C(O)C(O)C(O)C1O CDAISMWEOUEBRE-UHFFFAOYSA-N 0.000 description 2
- 210000002966 serum Anatomy 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000600 sorbitol Substances 0.000 description 2
- 239000005720 sucrose Substances 0.000 description 2
- 229960004793 sucrose Drugs 0.000 description 2
- 108010078791 Carrier Proteins Proteins 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LEVWYRKDKASIDU-QWWZWVQMSA-N D-cystine Chemical compound OC(=O)[C@H](N)CSSC[C@@H](N)C(O)=O LEVWYRKDKASIDU-QWWZWVQMSA-N 0.000 description 1
- 102000003844 DNA helicases Human genes 0.000 description 1
- 108090000133 DNA helicases Proteins 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 208000005577 Gastroenteritis Diseases 0.000 description 1
- 238000003794 Gram staining Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000001888 Peptone Substances 0.000 description 1
- 108010080698 Peptones Proteins 0.000 description 1
- 206010039438 Salmonella Infections Diseases 0.000 description 1
- 206010040047 Sepsis Diseases 0.000 description 1
- 208000037386 Typhoid Diseases 0.000 description 1
- 108020002494 acetyltransferase Proteins 0.000 description 1
- 102000005421 acetyltransferase Human genes 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 229960001506 brilliant green Drugs 0.000 description 1
- HXCILVUBKWANLN-UHFFFAOYSA-N brilliant green cation Chemical compound C1=CC(N(CC)CC)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](CC)CC)C=C1 HXCILVUBKWANLN-UHFFFAOYSA-N 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229960003067 cystine Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003495 flagella Anatomy 0.000 description 1
- 229940124307 fluoroquinolone Drugs 0.000 description 1
- -1 fluoroquinolones Chemical class 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000006799 invasive growth in response to glucose limitation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000019319 peptone Nutrition 0.000 description 1
- 235000015277 pork Nutrition 0.000 description 1
- 244000144977 poultry Species 0.000 description 1
- 238000012257 pre-denaturation Methods 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 206010039447 salmonellosis Diseases 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229940082569 selenite Drugs 0.000 description 1
- MCAHWIHFGHIESP-UHFFFAOYSA-L selenite(2-) Chemical compound [O-][Se]([O-])=O MCAHWIHFGHIESP-UHFFFAOYSA-L 0.000 description 1
- 208000013223 septicemia Diseases 0.000 description 1
- 125000003607 serino group Chemical group [H]N([H])[C@]([H])(C(=O)[*])C(O[H])([H])[H] 0.000 description 1
- 230000000405 serological effect Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 201000008297 typhoid fever Diseases 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 244000000023 zoonotic pathogen Species 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/90—Isomerases (5.)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/02—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving viable microorganisms
- C12Q1/18—Testing for antimicrobial activity of a material
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y306/00—Hydrolases acting on acid anhydrides (3.6)
- C12Y306/04—Hydrolases acting on acid anhydrides (3.6) acting on acid anhydrides; involved in cellular and subcellular movement (3.6.4)
- C12Y306/04012—DNA helicase (3.6.4.12)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y599/00—Other isomerases (5.99)
- C12Y599/01—Other isomerases (5.99.1)
- C12Y599/01002—DNA topoisomerase (5.99.1.2)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/195—Assays involving biological materials from specific organisms or of a specific nature from bacteria
- G01N2333/24—Assays involving biological materials from specific organisms or of a specific nature from bacteria from Enterobacteriaceae (F), e.g. Citrobacter, Serratia, Proteus, Providencia, Morganella, Yersinia
- G01N2333/255—Salmonella (G)
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Genetics & Genomics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Tropical Medicine & Parasitology (AREA)
- Virology (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biophysics (AREA)
- Immunology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The invention relates to the technical field of drug-resistant strains, in particular to salmonella typhimurium carrying four quinolone drug-resistant mutation sites and application thereof. The salmonella typhimurium carries four quinolone drug resistance mutation sites, and the four quinolone drug resistance mutation sites are respectively: serine at 83 of the gyrA gene coding product is mutated into phenylalanine; aspartic acid at position 87 of the coded product of gyrA gene is mutated into glycine; serine at position 80 of the parC gene coding product is mutated into arginine; serine 458 of the parE gene coding product is mutated to proline. These mutation sites result in the salmonella strain exhibiting high levels of resistance to quinolones. In view of the above, sal17241 of Salmonella can be used as a model material for screening novel antibacterial drugs, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of drug-resistant strains, in particular to salmonella typhimurium carrying four quinolone drug-resistant mutation sites and application thereof.
Background
Salmonella spp is a zoonotic pathogen with important significance in public health, and can cause a plurality of serious diseases such as typhoid, paratyphoid, gastroenteritis, septicemia and the like of people and animals, so that huge economic losses are suffered worldwide. Currently, about 2610 serotypes have been found worldwide. Among them, salmonella typhimurium (Salmonella enterica subsp. Enterica serovar Typhimurium) is a dominant serotype existing in livestock and poultry and foods, and is also a main serotype causing human infection.
Quinolones, particularly fluoroquinolones, are a last-selectable class of important drugs for the treatment of potentially life-threatening infections caused by multidrug-resistant salmonella. With the wide application of the medicines in clinic and production, the problem of drug resistance of bacteria to the medicines is increasingly serious. Research shows that the drug resistance of salmonella to quinolones rises year by year, while the drug resistance rate of salmonella typhimurium is generally higher than that of other salmonella.
The most important mechanism of the salmonella for generating drug resistance to quinolone drugs is that DNA helicase (coding genes: gyrA and gyrB) and topoisomerase IV (coding genes: parC and parE) at target sites of action of the quinolone drugs are subjected to gene mutation, so that the structure of the enzyme is changed, and the combination with the quinolone drugs is affected. gyrA, gyrB, parC and parE are also known as quinolone resistance determining regions (quinolone resistance-determining regions, QRDR). In addition, plasmid-mediated quinolone drug resistance mechanisms (plasmid-mediated quinolone resistance, PMQR), including the QNR protein (coding gene: qnrA, qnrB, qnrC, qnrD, qnrS, qnrVC), efflux pump transporters (coding genes: qepA and oqxAB), and acetyltransferases (coding genes: aac (6') -Ib-cr) are also responsible for the reduced susceptibility of bacteria to quinolones.
The extent of resistance of salmonella to quinolones is generally related to the location and number of mutation sites. Single site mutations can cause low levels of resistance, and if 2 or more mutations occur simultaneously, high levels of resistant strains can result. Currently, there have been reports on salmonella QRDR mutant strains, in which single site mutation is the dominant, and multiple mutations occur simultaneously, resulting in a relatively rare high-level drug-resistant strain.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides salmonella typhimurium carrying four quinolone drug-resistant mutation sites and application thereof, and the salmonella typhimurium can be used as a model material for screening functional microorganisms/novel antibacterial drugs, and has good application prospect.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the salmonella typhimurium is provided, and carries four quinolone drug resistance mutation sites at the same time, wherein the four quinolone drug resistance mutation sites are respectively:
serine at 83 of the gyrA gene coding product is mutated into phenylalanine;
aspartic acid at position 87 of the coded product of gyrA gene is mutated into glycine;
serine at position 80 of the parC gene coding product is mutated into arginine;
serine 458 of the parE gene coding product is mutated to proline.
As a preferred embodiment of the Salmonella typhimurium of the present invention, the gyrA gene has NCBI accession number AE006468 REGION 2373710..2376422, the parC gene has NCBI accession number AE006468 REGION 3336954..3339227, and the parE gene has NCBI accession number AE006468 REGION 3343969..3345861.
As a preferred embodiment of the Salmonella typhimurium of the present invention, salmonella typhimurium (Salmonella enterica subsp. Enterica serovar Typhimurium) Sal17241, which was classified as Salmonella typhimurium (Salmonella enterica subsp. Enterica serovar Typhimurium), was deposited in the microorganism strain deposit center of Guangdong province at 9 months 30 in 2020, the deposit address: guangzhou city first middle road 100 # college 59 # building 5, deposit number: GDMCC No:61226.
the invention discovers that a strain carries four quinolone drug-resistant mutation sites gyrA simultaneously S83F 、gyrA D87G 、parC S80R And parE S458P The salmonella typhimurium, the gyrA gene coding product of the strain has double mutation: ser83→phe (serine mutation to phenylalanine, abbreviated as S83F), asp87→gly (aspartic acid mutation to glycine, abbreviated as D87G), single site mutation of the parC gene coding product (Ser 80→arg) (serine mutation to arginine, abbreviated as S80R), and single site mutation of the parE gene coding product (Ser 458→pro) (serine mutation to proline, abbreviated as S458P). This is the first discovery of four quinolone drug-resistant mutation sites gyrA S83F 、gyrA D87G 、parC S80R And parE S458P Meanwhile, the strain exists in a salmonella typhimurium strain, and the strain is not reported at home and abroad. Meanwhile, the strain does not have any plasmid-mediated quinolone drug resistance gene. Therefore, the mutation sites cause the strain to show high-level drug resistance to quinolones, and the minimum antibacterial concentration of nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin to salmonella Sal17241 strain is 8192 mug/mL, 32 mug/mL, 16 mug/mL and 8 mug/mL respectively.
The Salmonella Sal17241 of the invention is gram negative and Brevibacterium, and the API 20E is identified as Salmonella, and the coincidence rate is 89.4%. The biochemical characteristics are as follows: arginine double hydrolase, lysine decarboxylase and ornithine decarboxylase are positive, citrate is decomposed, hydrogen sulfide is generated, glucose, mannitol, sorbitol, rhamnose, melibiose, arabinose, urease, phenylalanine deaminase, oxidase, ONPG test, indole test and VP test are negative, gelatin cannot be liquefied, inositol, sucrose and amygdalin cannot be fermented, and the biological and biochemical characteristics of salmonella are typical. The serum antigenicity was identified as 1,4,5,12:i:1,2, which is a typical Salmonella typhimurium serotype.
Salmonella Sal17241 can be cultured in LB, BHI and NA media.
The invention also provides a microbial agent, which comprises the salmonella typhimurium.
The invention also provides application of the salmonella typhimurium in screening mode strains of novel antibacterial drugs.
The invention has the beneficial effects that:
the invention provides a novel quinolone medicine which simultaneously carries four drug-resistant mutation sites gyrA S83F 、gyrA D87G 、parC S80R And parE S458P Salmonella enterica Sal17241. The simultaneous existence of a plurality of mutation sites causes the strain to show high-level drug resistance to quinolone medicines, and the minimum antibacterial concentration of nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin to salmonella Sal17241 strains is 8192 mug/mL, 32 mug/mL, 16 mug/mL and 8 mug/mL respectively. In view of the above, sal17241 of Sal can be used as a model material for screening functional microorganisms/novel antibacterial drugs, and has good application prospect.
Drawings
Fig. 1: colony morphology of Salmonella strain Salmonella 17241 of the present invention.
Fig. 2: morphological images were observed by microscopic examination of Sal17241 strain of Salmonella of the present invention.
Fig. 3: the biochemical identification schematic of the API 20E of the Salmonella Sal17241 strain of the invention.
Fig. 4: the invention relates to a specific locus for the mutation of gyrA gene in Sal17241 of salmonella; gyrA (324 C.fwdarw.T, ser 83.fwdarw.Phe; 336 A.fwdarw.G, asp87.fwdarw.Gly).
Fig. 5: the specific site of the parC gene mutation in Sal17241 of the salmonella; parC (253A. Fwdarw.C, ser 80. Fwdarw.Arg).
Fig. 6: the specific site of the parE gene mutation in Sal17241 of the salmonella; parE (1372 T→C, ser458→Pro).
Detailed Description
In order to more clearly describe the technical solution of the present invention, the following description is further given by way of specific examples, but not by way of limitation, only some examples of the present invention.
EXAMPLE 1 isolation of strains
Sal17241 is separated from fresh pork food in a supermarket in Nanning China, and the collected sample is detected, wherein the detection method refers to salmonella for food safety national standard food microbiology inspection GB 4789.4-2010. 25g (mL) of the sample was taken, homogenized in a sterile homogenizing bag containing 225mL of Buffered Peptone Water (BPW), and incubated at 37℃for 8-18 h. The cultured sample mixture is gently shaken, 1mL of the sample mixture is transferred into 10mL of sodium sulfotetrasulfonate brilliant green (TTB) enrichment medium, the sample mixture is cultured for 18 to 24 hours at the temperature of 42 ℃, and simultaneously, 1mL of the sample mixture is transferred into 10mL of Selenite Cystine (SC) enrichment medium, and the sample mixture is cultured for 18 to 24 hours at the temperature of 37 ℃. Taking 1 loop of enrichment liquid by using an inoculating loop, streaking and inoculating the enrichment liquid to a salmonella chromogenic medium plate, culturing the enrichment liquid for 18 to 24 hours at 37 ℃ respectively, and observing colonies growing on the plate. The typical salmonella colonies were purple, round, moist, and edge-flattened on the chromogenic plate (fig. 1). Colonies of interest were transferred from Nutrient Agar (NA) plates to brain heart infusion nutrient Broth (BHI) and incubated overnight at 37 ℃. Under aseptic condition, the bacterial liquid is added into an glycerol pipe with the final concentration of 50 percent, stored in a refrigerator with the temperature of minus 40 ℃ and freeze-dried pipe storage is carried out, thus obtaining the bacterial strain Sal17241.
EXAMPLE 2 identification and cultivation of strains
The purified strain Sal17241 is identified in aspects of morphological characteristics, physiological biochemistry, serotypes and the like.
(1) Color dyeing and checking: colonies were smeared and gram stained and observed for morphology by microscopic examination. Salmonella was gram negative, short bar-shaped (fig. 2).
(2) API 20E authentication: individual colonies were scraped from NA plates, prepared into a cell suspension of appropriate turbidity with physiological saline and identified using API 20E biochemical identification kit (fig. 3).
(3) Serotype identification: the salmonella isolates were subjected to serotyping using slide agglutination. First, the bacterial antigen (O antigen) of Salmonella is checked, then the phase I and phase II flagella antigens (H antigen) of the strain are sequentially determined, and finally, the serotype diagnosis is made by referring to the Salmonella diagnosis antigen table.
The strain Sal17241 is gram negative and Brevibacterium, the API 20E is identified as Salmonella, and the coincidence rate is 89.4%. The biochemical characteristics are as follows: arginine double hydrolase, lysine decarboxylase and ornithine decarboxylase are positive, citrate is decomposed, hydrogen sulfide is generated, glucose, mannitol, sorbitol, rhamnose, melibiose, arabinose, urease, phenylalanine deaminase, oxidase, ONPG test, indole test and VP test are negative, gelatin cannot be liquefied, inositol, sucrose and amygdalin cannot be fermented, and the biological and biochemical characteristics of salmonella are typical. The serum antigenicity was identified as 1,4,5,12:i:1,2, which is a typical Salmonella typhimurium serotype.
The appearance, morphology, gram staining, biochemical reaction and serological reaction of the strain Sal17241 are comprehensively judged, and the strain Sal17241 can be identified as Salmonella enterica subspecies typhimurium serotype (Salmonella enterica subsp.enterica serovar Typhimurium) of Salmonella, and is named Salmonella Sal17241.
Salmonella Sal17241 was deposited at 30/9/2020 with the Guangdong province microbiological bacterial collection center (GDMCC) at the deposit address: guangzhou city first middle road 100 # college 59 # building 5, deposit number: GDMCC No:61226.
EXAMPLE 3 Salmonella Sal17241 drug sensitive profiling
Sand was examined using broth dilution according to the method and results judgment standard of the american clinical laboratory standardization committee (Clinical and Laboratory Standards institute, CLSI) version 2018The Sal17241 strain of the portal fungus has high and low resistance to quinolone drugs, and the drugs tested comprise nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin. The salmonella Sal17241 strain was inoculated into a tube containing 4mL MH broth, incubated to logarithmic phase, and turbidimetric with a 0.5 McMeter tube to give a bacterial suspension concentration of 1X 10 7 cfu/mL. Taking the bacterial liquid, and using fresh MH broth according to the proportion of 1:200, diluting and uniformly mixing. Sterile 96-well flat bottom microplates were selected, 100 μl of MH broth medium was added to each row of wells 1, then 100 μl of the drug to be tested was added to each row of wells 1, mixed well, and 100 μl was removed and transferred to wells 2, and similarly 100 μl was aspirated and discarded after mixing well up to wells 12. Finally, the Salmonella of the present invention Salmonella 17241 (1×10) after being mixed uniformly is added into each well 5 cfu/mL) of 100. Mu.L of the bacterial suspension. Selecting a proper hole site, adding 200 mu L of MH broth culture medium as a negative control; as positive controls, 100. Mu.L of Sal17241 broth and 100. Mu.L of MH broth were added. Each group was run 3 times in parallel. The plates were incubated in an incubator at 37℃for 18-20h for observations and MIC values were determined. And taking out the culture plate from the incubator, and reading an OD value by using an enzyme-labeled instrument to obtain a drug sensitivity result and an analysis report. Or judging the negative and positive results of each hole by naked eyes, wherein the turbidity is positive and the clarity is negative.
The results showed that the minimum inhibitory concentrations (Minimal inhibitory concentration, MIC) of nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin against Sal17241 strain of Salmonella were 8192 μg/mL,32 μg/mL,16 μg/mL,8 μg/mL, respectively. The specific drug sensitivity results of Sal17241 strain of Salmonella are shown in Table 1.
TABLE 1 drug resistance of Sal17241 Strain of Sal to quinolones
Example 4 detection of quinolone drug resistance Gene of Sal17241 Strain of Sal
(1) Whole genome second generation sequencing and Blast sequence analysis target drug resistance gene
The salmonella Sal17241 strain was subjected to genome-wide second-generation sequencing. Genomic DNA was broken into 400bp fragments using a Covaris M200 sonicator and library construction work was performed using Ion Plus Fragment Library Kit. Whole genome sequencing was performed using Ion Torrent S5 sequencer. Genome de novo assembly was performed by SPAdes v 3.6.2. Meanwhile, prokka is used for predicting the genome components such as coding genes, tRNA, rRNA and the like of the spliced genome sequence, and performing functional annotation of the coding genes.
And detecting the drug resistance gene of the quinolone drugs by adopting a local Blast sequence analysis technology. Local Blast analysis: the method comprises the steps of constructing a local database db.nt by using an operation command ' makeblastdb-in 17241.Ffn-dbtype nucleic-service_seqids-out 17241db.nt ' by using a whole genome sequencing sequence information document of a Sal17241 strain of Sal (17241. Ffn is a whole genome sequencing sequence information document name of the strain, 17241db. Nt is a constructed database name), and then outputting a result of the local database 41. Nt by using a sequence information document of a target site (QRDR gene: gyrA, gyrB, parC, parE; PMQR genes: qnrA, qnrB, qnrC, qnrD, qnrS, qnrVC, aac (6 ') -Ib-cr, qepA, oxqAB) as a target gene (using an analysis gyrA gene as an example, gyrA. Txt is a sequence information document of a target gene), and using an operation command ' blastn-db 17241db. Nt-eval fmt 0-5-dim_descum 10-num_pages 64-quegyra-group's data as a result of the local database 41. Mu. Ttry-gyrA. Ttuqunt. And finally, checking the output file and judging the result.
(2) PCR amplification target drug resistance gene and Sanger method first-generation sequencing analysis
And (3) further verifying the detection result of the target drug resistance gene by performing genome-wide second-generation sequencing and Blast sequence analysis on the strain by adopting a method of PCR amplification and Sanger method first-generation sequencing analysis. PCR amplification primers of the target drug-resistant genes are designed according to published gene sequences, and the primer sequences are shown in Table 1. The PCR amplification reaction system (25. Mu.L) was used by the method of single PCR: 12.5. Mu.L of 2 XPremix Taq, 120nmol/L of each of the upstream and downstream primers, 2. Mu.L of template, and ultra pure water; PCR amplification reaction conditions: pre-denaturation at 95 ℃ for 5min; denaturation at 95℃for 45s, annealing at 55-60℃for 45s, extension at 72℃for 45s, and a total of 30 cycles; extending at 72℃for 10min. And (3) performing electrophoresis detection (120V, 30 min), purification and first-generation sequencing analysis on the amplified fragments to obtain the sequence information of the amplified target genes. Blast analysis and result judgment are carried out on the sequencing result. The PCR amplification primers for each target gene designed in the study are as follows:
TABLE 2 Salmonella gyrA, parC, parE primers and amplified fragment sizes
(3) Detection result of quinolone drug resistance gene of Sal17241 strain of salmonella
Comparing with the standard strain LT2 gene sequence of Salmonella typhimurium, detecting gyrA, parC, parE mutation in the QRDR gene of Salmonella Sal17241 strain; the gyrA gene coding product is subjected to double mutation: ser83→phe (serine mutation to phenylalanine, abbreviated as S83F), asp87→gly (aspartic acid mutation to glycine, abbreviated as D87G), single site mutation of the parC gene coding product (Ser 80→arg) (serine mutation to arginine, abbreviated as S80R), and single site mutation of the parE gene coding product (Ser 458→pro) (serine mutation to proline, abbreviated as S458P). The PMQR gene (qnrA, qnrB, qnrC, qnrD, qnrS, qnrVC, aac (6') -Ib-cr, qepA, oxqAB) is not detected at all. Further adopting PCR amplification and Sanger method first generation sequencing to make verification, and making detection results of two methods be identical.
The meaning of the amino acid symbols is: serine (abbreviated Ser or S), phenylalanine (abbreviated Phe or F), aspartic acid (abbreviated Asp or D), glycine (abbreviated Gly or G), arginine (abbreviated Arginine, abbreviated Arg or R), proline (abbreviated Pro or P).
Details of the gyrA, parC, parE mutation detected in the QRDR gene of Sal17241 strain of Salmonella are shown in FIGS. 4-6, respectively.
EXAMPLE 5 application of quinolone-resistant Salmonella Sal17241 Strain
The specific application method of salmonella Sal17241 is mainly characterized in two aspects:
(1) Sal17241 of Sal and four quinolone drug-resistant mutation sites gyrA are carried simultaneously S83F 、gyrA D87G 、parC S80R And parE S458P High levels of resistance to four quinolone antibacterial drugs (nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin), particularly ciprofloxacin, are considered to be good drugs for treating infections caused by salmonella, and have been remarkable in recent years. The occurrence of multiple mutations of quinolone drug resistance determining region genes in the same strain has important guiding significance for discussing the drug resistance generating mechanism of quinolone drugs and researching a new strategy for treating salmonella infection, and can be used as an important material for seeking a bacterial drug resistance mechanism.
(2) Sal17241 of Sal and four quinolone drug-resistant mutation sites gyrA are carried simultaneously S83F 、gyrA D87G 、parC S80R And parE S458P The novel antibacterial agent can produce high-level drug resistance to four quinolone antibacterial drugs (nalidixic acid, ciprofloxacin, levofloxacin and moxifloxacin), and can also be used as an important mode strain for screening novel antibacterial drugs.
The screening method of the antibacterial drugs comprises the following steps:
precisely weighing a certain amount of medicine to be measured, dissolving the medicine with a proper solvent, and preparing a 30mg/mL solution for later use. Then preparing a solution with the concentration of 2000 mug/mL by using a proper solvent, and measuring the minimum inhibitory concentration (minimum inhibitory concentration, MIC) and the minimum bactericidal concentration (minimum bactericidal concentration, MBC) of the solution, and storing the solution in a refrigerator at the temperature of minus 40 ℃ for standby. The day before the experiment, the salmonella Sal17241 of the invention stored in a refrigerator at the temperature of minus 40 ℃ is taken out, and after the salmonella Sal17241 is cooled to the room temperature, a small amount of bacterial colonies are respectively picked up by an inoculating loop, respectively inoculated on MH agar medium, and cultured for 18 to 24 hours in a constant temperature cabinet at the temperature of 37 ℃. On MH agar medium with newly grown colony, small amount of activated colony is selected by inoculating loop, diluted with sterile physiological saline to obtain 1×10 7 cfu/mL of bacterial suspension (standard turbidimetric tube control) is preparedIs used.
The drug to be tested sensitive to the drug resistant strain was screened and the sensitivity of the strain to the different drugs was determined according to the paper diffusion method recommended by the american Clinical Laboratory Standardization Institute (CLSI). Dipping the prepared standard bacteria concentration with a sterile cotton swab to be 1 multiplied by 10 7 cfu/mL of the bacterial suspension was spread evenly onto the corresponding MH agar medium with a spreading bar. Placing the sterilized oxford cup on the coated MH agar medium, and adding 50 mu L of the prepared liquid medicine (30 mg/mL) into the oxford cup by using a micropipette; culturing in a 37 deg.C incubator for 18-24 hr, and measuring the size of the inhibition zone. An equal volume of MH broth medium was taken and vehicle was added as a blank.
Screening for drug-resistant strains for drug-sensitive assays MIC values of the strains for the different drugs were determined according to the american Clinical Laboratory Standardization Institute (CLSI) recommended broth dilution method, and each group was run 3 times in parallel to obtain concentration averages. When MIC values were measured, 1X 10 portions were prepared with sterile physiological saline 7 The cfu/mL bacterial suspension is diluted again to a concentration of 1X 10 5 cfu/mL. Sterile 96-well flat bottom microplates were selected, 100 μl of MH broth medium was added to each row of wells 1, then 100 μl of the drug to be tested was added to each row of wells 1, mixed well, and 100 μl was removed and transferred to wells 2, and similarly 100 μl was aspirated and discarded after mixing well up to wells 12. Finally, the Salmonella of the present invention Salmonella 17241 (1×10) after being mixed uniformly is added into each well 5 cfu/mL) of 100. Mu.L of the bacterial suspension. Selecting a proper hole site, adding 200 mu L of MH broth culture medium as a negative control; as positive controls, 100. Mu.L of Sal17241 broth and 100. Mu.L of MH broth were added. The plates were incubated in an incubator at 37℃for 18-20h for observations and MIC values were determined. And taking out the culture plate from the incubator, and reading an OD value by using an enzyme-labeled instrument to obtain a drug sensitivity result and an analysis report. Or judging the negative and positive results of each hole by naked eyes, wherein the turbidity is positive and the clarity is negative. When the MIC value is determined, the mixture of bacteria and MH broth in the 3-5 holes before the MIC value is taken, transferred onto MH agar medium, placed in an incubator at 37 ℃, and after 22 hours of culture, taken out for observation, and the minimum drug concentration with average number less than 5 is determined as MBC of the compound.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
SEQUENCE LISTING
<110> Guangdong province microorganism institute (Guangdong province microorganism analysis and detection center)
<120> Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof
<160> 6
<170> PatentIn version 3.3
<210> 1
<211> 20
<212> DNA
<213> Synthesis
<400> 1
gcgaccttgc gagagaaatt 20
<210> 2
<211> 20
<212> DNA
<213> Synthesis
<400> 2
ggcagccgtt aatcacttcc 20
<210> 3
<211> 20
<212> DNA
<213> Synthesis
<400> 3
ggatcccctg ttaatgagcg 20
<210> 4
<211> 20
<212> DNA
<213> Synthesis
<400> 4
cgggatatct gttgccatgc 20
<210> 5
<211> 20
<212> DNA
<213> Synthesis
<400> 5
ttccgtgaaa atgcaggacc 20
<210> 6
<211> 20
<212> DNA
<213> Synthesis
<400> 6
ttcagttgtt ccagtacgcc 20
Claims (3)
1. The salmonella typhimurium is characterized in that the salmonella typhimurium carries four quinolone drug resistance mutation sites simultaneously, and the four quinolone drug resistance mutation sites are respectively:
gyrAserine at position 83 of the gene encoding product is mutated to phenylalanine;
gyrAaspartic acid at position 87 of the gene encoding product is mutated to glycine;
parCthe 80 th serine of the gene coding product is mutated into arginine;
parEserine 458 of the gene coding product is mutated into proline;
the salmonella typhimurium is salmonella typhimurium @Salmonella enterica subsp. enterica serovar Typhimurium) Sal17241, classified as Salmonella typhimuriumSalmonella enterica subsp. enterica serovar Typhimurium) has been deposited at 30.9 in 2020 with the cantonese collection of microorganism strains, accession number: guangzhou city first middle road 100 # college 59 # building 5, deposit number: GDMCC No:61226.
2. a microbial agent comprising salmonella typhimurium as defined in claim 1.
3. Use of salmonella typhimurium as defined in claim 1 as a model strain for screening novel antibacterial agents.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011495870.2A CN113913318B (en) | 2020-12-17 | 2020-12-17 | Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011495870.2A CN113913318B (en) | 2020-12-17 | 2020-12-17 | Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113913318A CN113913318A (en) | 2022-01-11 |
CN113913318B true CN113913318B (en) | 2024-03-08 |
Family
ID=79231276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011495870.2A Active CN113913318B (en) | 2020-12-17 | 2020-12-17 | Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113913318B (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014170614A1 (en) * | 2013-04-19 | 2014-10-23 | Universite De Reims Champagne-Ardenne | Method for characterising the chromosomal mutations of genes coding bacterial topoisomerases |
WO2016024098A1 (en) * | 2014-08-11 | 2016-02-18 | Redx Pharma Plc | Antibiotic-resistant bacteria and their uses |
CN107034160A (en) * | 2017-05-04 | 2017-08-11 | 中国农业科学院上海兽医研究所 | The dual-gene gene-deleted strains of Salmonella typhimurtum aroA and luxS and its attenuated vaccine of preparation |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI349704B (en) * | 2004-08-10 | 2011-10-01 | Food And Drug Administration Dept Of Health | A method for rapidly detecting quinolone-resistant salmonella spp. and the probes and primers utilized therein |
WO2016020836A1 (en) * | 2014-08-06 | 2016-02-11 | Novartis Ag | Quinolone derivatives as antibacterials |
TWI778025B (en) * | 2017-02-24 | 2022-09-21 | 碁米庫斯生物科技股份有限公司 | Antibiotic testing and screening system |
-
2020
- 2020-12-17 CN CN202011495870.2A patent/CN113913318B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014170614A1 (en) * | 2013-04-19 | 2014-10-23 | Universite De Reims Champagne-Ardenne | Method for characterising the chromosomal mutations of genes coding bacterial topoisomerases |
WO2016024098A1 (en) * | 2014-08-11 | 2016-02-18 | Redx Pharma Plc | Antibiotic-resistant bacteria and their uses |
CN107034160A (en) * | 2017-05-04 | 2017-08-11 | 中国农业科学院上海兽医研究所 | The dual-gene gene-deleted strains of Salmonella typhimurtum aroA and luxS and its attenuated vaccine of preparation |
Non-Patent Citations (3)
Title |
---|
CM Bebear 等.Mutations in the gyrA,parC and parE genes addociated with fluoroquinolone resistance in clinical isolates of Mycoplasma hominis.Antimicrob agents chemother.1999,第954-956页. * |
Molecular mechanisms of fluoroquinolone resistance in Enterobacteriaceae clinical isolates in Azerbaijan;Azagun R等;Gene reports;第21卷;第100924页 * |
食源性沙门氏菌耐药性及质粒介导喹诺酮耐药基因检测;刘贵深 等;生物技术通报(第8期);第202-207页 * |
Also Published As
Publication number | Publication date |
---|---|
CN113913318A (en) | 2022-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Yang et al. | Magnetic nano-beads based separation combined with propidium monoazide treatment and multiplex PCR assay for simultaneous detection of viable Salmonella Typhimurium, Escherichia coli O157: H7 and Listeria monocytogenes in food products | |
CN114214238B (en) | Multi-drug-resistant Indiananas and application thereof | |
CN112961805B (en) | Salmonella typhimurium with quinolone drug resistance genes gyrA and parE mutated simultaneously and application thereof | |
CN112961804B (en) | Salmonella typhimurium and application thereof | |
Maheux et al. | Method for isolation of both lactose-fermenting and–non-fermenting Escherichia albertii strains from stool samples | |
CN114891902A (en) | Primer-probe combination for rapidly detecting five virulent pathogenic bacteria based on liquid drop digital PCR and application method thereof | |
CN111621451B (en) | Bacillus, method for detecting antibiotic residue by using bacillus and application of method | |
CN102851384A (en) | Multi-PCR (polymerase chain reaction) detection method of four diarrhoeic Escherichia coli and primer group thereof | |
CN114250181B (en) | Indiananas with five quinolone drug resistance mutation sites and application thereof | |
CN116083275B (en) | Indiana salmonella and application thereof | |
Tarh | A Review on Diagnostic Methods for the Identification of Vibrio cholerae | |
CN113913318B (en) | Salmonella typhimurium carrying four quinolone drug-resistant mutation sites simultaneously and application thereof | |
CN115960753A (en) | Method for screening lactic acid bacteria with strong colonization ability based on in vivo evolution | |
RU2425877C1 (en) | BACTERIOPHAGE Escherichia coli V32 STRAIN FOR IDENTIFICATION OF Escherichia coli BACTERIA SEROGROUP O157 | |
RU2744203C1 (en) | Strain of bacteria salmonella enterica sbsp_ enterica serovar kentucky b-9045 of the international multiresistant clone of salmonella kentucky st198 used as a control strain for phenotypic and molecular studies in diagnosing salmonellosis | |
CN109825557A (en) | A kind of method of Sulfonamides-resistant genes sulI in detection atmospheric environment | |
Mohammed et al. | Molecular identification and characterization and phylogenetic study in Escherichia coli in Baghdad province | |
CN112646906B (en) | Diarrhea-causing escherichia coli standard reference strain containing specific molecular target and detection and application thereof | |
CN114196768B (en) | Specific molecular target for identifying pseudomonas aeruginosa serogroup and rapid detection method thereof | |
CN113388539B (en) | Salmonella standard strain containing specific molecular target and detection and application thereof | |
JP7538125B2 (en) | Methods for detecting and enumerating low levels of Listeria | |
CN100497592C (en) | Mycobactrium tuberculosis protein for diagnosing rifampicin dependent mycobacterium tuberculosis | |
CN115725462A (en) | Colibacillus EC382-2-2 capable of resisting polymyxin and producing extended-spectrum beta-lactamase and application thereof | |
Thomson‐Carter | General recovery, characterisation and typing protocols for VTEC | |
Perera et al. | DETECTION OF TETRACYCLINE RESISTANCE IN COLIFORM BACTERIA FROM DRINKING WATER SAMPLES, OBTAINED FROM PANADURA, SRI LANKA |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |