CN104830955A - Nocardia asteroid selective medium for sputum samples - Google Patents
Nocardia asteroid selective medium for sputum samples Download PDFInfo
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- CN104830955A CN104830955A CN201510300131.6A CN201510300131A CN104830955A CN 104830955 A CN104830955 A CN 104830955A CN 201510300131 A CN201510300131 A CN 201510300131A CN 104830955 A CN104830955 A CN 104830955A
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Abstract
The invention discloses a nocardia asteroid selective medium for sputum samples and belongs to the field of detection of microculture. The nocardia asteroid selective medium is characterized in that 1000 ml of culture medium comprises ox liver powder, malt extract powder, yeast extract powder, sodium chloride, agar, ferroporphyrin, calcium lactate, nalidixic acid, Incarvillea argute ketone, vitamin K1, casein phosphopeptides and sterile defiber sheep blood and the balance of distilled water. Compared with the prior art, the nocardia asteroid selective medium has the advantages of reliability in detection and high separation efficiency of nocardia asteroid.
Description
Technical field
The present invention relates to inspection microorganism culturing field, be specifically related to a kind of sputum sample nocardia asteroide Selective agar medium.
Background technology
Microorganism culturing is a kind of technology making microbial growth by artificial means, and the substratum that selective medium is used to promote or suppress the organism (as cell or bacterium etc.) of certain type and designs, utilize this substratum required microorganism can be separated from the microorganism mixed.Nocardia asteroide (Actinomyces eppingeri) is aerobic soil saprophytic microorganism, belong to actinomycetic one, it is conditioned pathogen, this bacterium is extensively present in air, dust, soil and domestic animal body surface, cause morbidity by respiratory system, also can invade through skin wound or traumatic surface, cause the nocardiasis of people, actinomyces eppingeri causes the primary of people, suppurative pulmonary infection mainly through respiratory tract, can occur phthisical symptom.Pulmonary lesions can be transferred to subcutis, forms abscess, ulcer and multiple fistula, also can be diffused into other organs.Similar to pulmonary tuberculosis, pulmonary aspergillosis, lung Wegner granuloma in clinical symptom, be easy to mistaken diagnosis.
In recent years, nocardia asteroide disease is unrare, have or without the crowd of dysimmunity in all can occur.Early diagnosis early treatment, can 100% to cure.If delay in diagnosis, case fatality rate can reach 30 ~ 50%, and the correct and Rapid identification therefore as the clinical bacteria inspection of making a definite diagnosis unique foundation is very important.At present, this Pseudomonas identify that gold standard is PCR qualification, but PCR test set requires and running cost is all higher, therefore multiplex common blood agar culture plate (BAP) cultivation of clinical cultivation.And nocardia asteroide belongs to severe bacteria, namely harsher to growing environment, nutritional requirement bacterium, or can not be difficult to growth in conventional environment.Nocardia asteroide poor growth, and the pathogenic bacteria such as streptococcus aureus, pneumonia ball chain bacterium, other actinomycetes is faster than nocardia asteroide growth on current substratum in sputum sample, cover substratum soon, actinomyces eppingeri cannot grow, and positive rate is low, uses traditional method to need 96 hours can have positive performance, within about 1 week, qualification can be made more exactly, the result delay time at stop, causing many places focus transfer, very easily causing death as being transferred to brain.
Summary of the invention
Technical assignment of the present invention is for above the deficiencies in the prior art, provides a kind of Selective agar medium being suitable for the growth of sputum sample nocardia asteroide.
The technical scheme that the present invention solves its technical problem is: a kind of for sputum sample nocardia asteroide Selective agar medium, its feature exists, and contains in the formula of preparation 1000ml substratum:
Beef liver powder 5.0 ~ 15.0g;
Fructus Hordei Germinatus leaching powder 2.0 ~ 5.0g;
Yeast extract powder 5.0 ~ 10.0g;
Sodium-chlor 5.0g;
Agar 15.0 ~ 20.0g;
Ferrous porphyrin 0.01 ~ 0.05g;
Calcium lactate 0.01 ~ 0.05g;
Nalidixic acid 0.01 ~ 0.05g;
2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.001 ~ 0.005g;
Vitamin K
10.01 ~ 0.1g;
Phosphopeptide caseinate 0.1 ~ 0.5g;
Aseptic defiber Sheep Blood 80 ~ 100ml;
Distilled water adds to 1000ml.
The preparation method of above-mentioned substratum is: take beef liver powder; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone mixing distilled water dissolves, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin K
1; Sterilizing network protein phosphatase polypeptide; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Wherein: described beef liver powder, Fructus Hordei Germinatus leaching powder provides carbon source, nitrogenous source, the nutritive ingredients such as yeast extract powder rich in proteins, amino acid, polypeptide, Nucleotide, VITAMIN, somatomedin, trace element, for microorganism provides balanced nutritious, these materials are all very important factors to the Growth and Reproduction promoting nocardia asteroide; Sodium-chlor maintains balanced osmotic pressure; Agar is the peptizer of substratum; Ferrous porphyrin is nutrition agent, for nocardia asteroide flourish provides required ferro element; Calcium lactate, except doing nutrient intensifier, can also suppress Gram-positive bacteria growing; Nalidixic acid suppresses the growth of Gram-negative bacteria; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone (2-Ethoxymethylene-3,5-dihydroxy-y-pyrone), laboratory study shows that 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone can suppress the growth of the miscellaneous bacterias such as streptococcus aureus, Staphylococcus albus, Hemolytic streptococcus, pneumococcus, micrococcus catarrhalis, diphtheria corynebacterium, Bacillus proteus, bacillus enteritidis, but under this concentration due to Nocardia without antibacterial and bacteriostasis, therefore improve the separation rate of nocardia asteroide.Be inoculated into by same nocardia asteroide on 2 BAP substratum by experiment, one of them BAP substratum adds 0.1% sterilizing vitamin k
1cultivate at 37 DEG C, after 48 hours, observe bacterial strain, find to add vitamin k
1bAP substratum have little nocardia asteroide bacterium colony, do not add vitamin k
1bAP substratum do not find nocardia asteroide bacterium colony, vitamin k
1promote cell's growth, differentiation are the somatomedins of nocardia asteroide; Aseptic defiber Sheep Blood provides energy environment; Phosphopeptide caseinate is activator, can promote that nocardia asteroide is to the picked-up of ferro element, calcium constituent; L-asparagine is nutrition-fortifying agent, promotes that nocardia asteroide is to amino acid whose picked-up; Radix Rehmanniae is the fresh of goatweed Radix Rehmanniae or dried root, and modern medicine study shows, containing more than 20 kind of glycoside in Radix Rehmanniae rhizome; 8 kinds of carbohydrates; More than 20 seed amino acids and more than 20 plant inorganic elements, and Radix Rehmanniae Aqueous extracts is good nutrition-fortifying agent, and have the effect suppressing staphylococcus aureus growth.
The present invention compared with prior art, has and detects the feature reliable, nocardia asteroide separation rate is high.
Embodiment
Below in conjunction with practical situation, the specific embodiment of the present invention is elaborated.
Embodiment 1, contains in the formula of preparation 1000ml substratum: beef liver powder 15.0g; Fructus Hordei Germinatus leaching powder 2.0g; Yeast extract powder 5.0g; Sodium-chlor 5.0g; Agar 15.0g; Ferrous porphyrin 0.01g; Calcium lactate 0.05g; Nalidixic acid 0.05g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.001g; Vitamin K
10.1g; Aseptic defiber Sheep Blood 100ml; Distilled water adds to 1000ml.Preparation method takes beef liver powder; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone mixing distilled water dissolves, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 2, contains in the formula of preparation 1000ml substratum: beef liver powder 10.0g; Fructus Hordei Germinatus leaching powder 5.0g; Yeast extract powder 8.0g; Sodium-chlor 5.0g; Agar 15.0g; Ferrous porphyrin 0.01g; Calcium lactate 0.03g; Nalidixic acid 0.03g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.003g; Vitamin K
10.01g; Network protein phosphatase polypeptide 0.1g; Aseptic defiber Sheep Blood 80ml; Distilled water adds to 1000ml.Preparation method takes beef liver powder; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone mixes, and distilled water dissolves, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin k
1; Sterilizing network protein phosphatase polypeptide; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 3, contains in the formula of preparation 1000ml substratum: beef liver powder 15.0g; Fructus Hordei Germinatus leaching powder 3.0g; Yeast extract powder 10.0g; Sodium-chlor 5.0g; Agar 20.0g; Ferrous porphyrin 0.02g; Calcium lactate 0.05g; Nalidixic acid 0.05; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.005g; Vitamin K
10.05g; L-asparagine 0.01g; Aseptic defiber Sheep Blood 90ml; Distilled water adds to 1000ml.Preparation method takes beef liver powder; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone; L-asparagine mixes, and distilled water dissolves, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 4, contains in the formula of preparation 1000ml substratum: beef liver powder 5.0g; Fructus Hordei Germinatus leaching powder 5.0g; Yeast extract powder 8.0g; Sodium-chlor 5.0g; Agar 20.0g; Ferrous porphyrin 0.03g; Calcium lactate 0.03g; Nalidixic acid 0.01g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.001g; Vitamin K
10.03g; Aseptic defiber Sheep Blood 90ml; 200g/L Radix Rehmanniae Aqueous extracts 200ml; Distilled water adds to 1000ml.Preparation method: (1) is got 40g Radix Rehmanniae and added water boil 30min, filters, gets filtrate, according to filtrate volume, taking the concentrated or adjustment volume that adds water to be 200g/L to concentration, obtaining Radix Rehmanniae Aqueous extracts 200ml; (2) beef liver powder is taken; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone; Mixing is dissolved in the Radix Rehmanniae extracting solution of step 1 gained, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 5, contains in the formula of preparation 1000ml substratum: beef liver powder 15.0g; Fructus Hordei Germinatus leaching powder 2.0g; Yeast extract powder 5.0g; Sodium-chlor 5.0g; Agar 15.0g; Ferrous porphyrin 0.05g; Calcium lactate 0.05g; Nalidixic acid 0.03g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.003g; Vitamin K
10.01g; Network protein phosphatase polypeptide 0.5g; L-asparagine 0.05g; Aseptic defiber Sheep Blood 90ml; Distilled water adds to 1000ml.Preparation method takes beef liver powder; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone; L-asparagine mixing distilled water dissolves, and 210 DEG C, sterilizing 15min, is cooled to 45 DEG C, adds sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing network protein phosphatase polypeptide; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 6, contains in the formula of preparation 1000ml substratum: beef liver powder 5.0g; Fructus Hordei Germinatus leaching powder 3.0g; Yeast extract powder 5.0g; Sodium-chlor 5.0g; Agar 20.0g; Ferrous porphyrin 0.02g; Calcium lactate 0.03g; Nalidixic acid 0.01g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.001g; Vitamin K
10.03g; Network protein phosphatase polypeptide 0.3g; Aseptic defiber Sheep Blood 90ml; The Radix Rehmanniae Aqueous extracts 250ml of concentration 200g/L; Distilled water adds to 1000ml.Preparation method preparation method: (1) is got 50g Radix Rehmanniae and added water boil 45min, filters, gets filtrate, according to filtrate volume, taking the concentrated or adjustment volume that adds water to be 200g/L to concentration, obtaining Radix Rehmanniae Aqueous extracts 250ml; (2) beef liver powder is taken; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone mixing is dissolved in the Radix Rehmanniae extracting solution of step (1) gained and mixes, and 210 DEG C of sterilizing 15min, are cooled to 45 DEG C, add sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing network protein phosphatase polypeptide; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 7, contains in the formula of preparation 1000ml substratum: beef liver powder 10.0g; Fructus Hordei Germinatus leaching powder 5.0g; Yeast extract powder 8.0g; Sodium-chlor 5.0g; Agar 15.0g; Ferrous porphyrin 0.05g; Calcium lactate 0.01g; Nalidixic acid 0.03g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.003g; Vitamin K
10.05g; L-asparagine 0.1g; Aseptic defiber Sheep Blood 100ml; The Radix Rehmanniae Aqueous extracts 300ml of concentration 200g/L; Distilled water adds to 1000ml.Preparation method: (1) is got 60g Radix Rehmanniae and added water boil 60min, filters, gets filtrate, according to filtrate volume, taking the concentrated or adjustment volume that adds water to be 200g/L to concentration, obtaining Radix Rehmanniae Aqueous extracts 300ml; (2) beef liver powder is taken; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone; L-asparagine mixing is dissolved in the Radix Rehmanniae extracting solution of step (1) gained and mixes, and 210 DEG C of sterilizing 15min, are cooled to 45 DEG C, add sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Embodiment 8, contains in the formula of preparation 1000ml substratum: beef liver powder 10.0g; Fructus Hordei Germinatus leaching powder 3.0g; Yeast extract powder 10.0g; Sodium-chlor 5.0g; Agar 20.0g; Ferrous porphyrin 0.01g; Calcium lactate 0.05g; Nalidixic acid 0.05g; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.005g; Vitamin K
10.05g; Network protein phosphatase polypeptide 0.3g; L-asparagine 0.01g; Aseptic defiber Sheep Blood 100ml; The Radix Rehmanniae Aqueous extracts 300ml of concentration 200g/L; Distilled water adds to 1000ml.Preparation method: (1) is got 60g Radix Rehmanniae and added water boil 60min, filters, gets filtrate, according to filtrate volume, taking the concentrated or adjustment volume that adds water to be 200g/L to concentration, obtaining Radix Rehmanniae Aqueous extracts 300ml; (2) beef liver powder is taken; Fructus Hordei Germinatus leaching powder; Yeast extract powder; Sodium-chlor; Agar; Calcium lactate; 2-Ethoxymethylene-3,5-dihydroxy-y-pyrone; L-asparagine mixing is dissolved in the Radix Rehmanniae extracting solution of step (1) gained and mixes, and 210 DEG C of sterilizing 15min, are cooled to 45 DEG C, add sterilizing ferrous porphyrin; Sterilizing nalidixic acid; Sterilizing network protein phosphatase polypeptide; Sterilizing vitamin K
1; Aseptic defiber Sheep Blood mixing, packing after sterile purified water constant volume to 1000ml.
Described Radix Rehmanniae Aqueous extracts concentration 200g/L refers to often liter containing crude drug 200g.
Gained nocardia asteroide Selective agar medium of the present invention is used for sputum sample, and have and detect the feature reliable, nocardia asteroide separation rate is high, be clinical data sufficient proof, pertinent data is as follows.
1 object and method.
1.1 medium preparing: experimental group establishes 4 groups altogether, are respectively embodiment 1 scheme group; Embodiment 2 scheme group, embodiment 6 scheme group, embodiment 8 scheme group and control group, control group is common blood agar culture plate (BAP) substratum, and its formula is: beef powder 5g/L, peptone 12g/L, agar 15g/L, sodium-chlor 5g/L, aseptic defiber Sheep Blood 100ml/L.
1.2 sputums gather cultural method: highly doubtful nocardia asteroide patients with pneumonia 26 example, get phlegm in morning, first use 20ml brine twice, after 10ml normal saline dilution, after adding the trypsin solution digestion 90min of the pH 7.6 of 1%, be inoculated in embodiment 1 scheme group with transfering loop sectional streak; Embodiment 2 scheme group; Embodiment 6 scheme group; Embodiment 8 scheme group and control group substratum.37 DEG C of insulations, insulation can is cultivated the tiny bacterium colony of 48h, 96h picking and is carried out identification of bacteria.Each sample number censorship PCR does molecular biology identification.
1.3 detect positive criteria: take out culture dish, observe small colonies on substratum, growth is slow, bacterium colony gauffer, in particulate state, without mycelia, with colony growth situation that is yellow or darkorange, select object bacteria smear, gramstaining, sediments microscope inspection goes out the positive, checks according to " clinical microbiology diagnosis and diagram ", and net result gold standard is PCR qualification.
2 results: what 26 parts of highly doubtful nocardia asteroide patients with pneumonia sputum samples were finally accredited as the nocardia asteroide positive through PCR is 21 examples.Each group of 48h detects the positive, false positive, feminine gender, false negative bacterial strain number of cases see the following form,
| Grouping | Sum | PCR is positive | Positive | False positive | Negative | False negative |
| Embodiment 1 | 26 | 21 | 17 | 1 | 9 | 5 |
| Embodiment 2 | 26 | 21 | 19 | 1 | 7 | 3 |
| Embodiment 6 | 26 | 21 | 19 | 0 | 7 | 2 |
| Embodiment 8 | 26 | 21 | 20 | 0 | 6 | 1 |
| Control group (BAP) | 26 | 21 | 5 | 0 | 21 | 16 |
The above results can be found out, cultivate after 48 hours, each embodiment group and control group positive rate more all have pole notable difference (P<0.001), and false negative rate is starkly lower than control group (P<0.001).Each embodiment group compares with PCR detected result, positive rate no significant difference (P>0.05).
Each group of 96h detects the positive, false positive, feminine gender, false negative bacterial strain number of cases see the following form,
| Grouping | Sum | PCR is positive | Positive | False positive | Negative | False negative |
| Embodiment 1 | 26 | 21 | 22 | 1 | 4 | 0 |
| Embodiment 2 | 26 | 21 | 20 | 0 | 6 | 1 |
| Embodiment 6 | 26 | 21 | 20 | 0 | 6 | 1 |
| Embodiment 8 | 26 | 21 | 21 | 0 | 5 | 0 |
| Control group (BAP) | 26 | 21 | 15 | 1 | 11 | 7 |
The above results can be found out, cultivate after 96 hours, each embodiment group compares with control group positive rate, all has notable difference (P<0.05), and false negative rate is starkly lower than control group (P<0.05).Each embodiment group compares with PCR detected result, positive rate no significant difference (P>0.05).
Above result shows, sputum sample is after embodiment of the present invention culture medium culturing, nocardia asteroide positive rate and PCR checkout discrepancy no difference of science of statistics, and 48 hours separation rates are apparently higher than existing substratum, after 96 hours, each embodiment and control group positive rate comparing difference reduce, but difference still has statistical significance, common BAP substratum under-nutrition bacterial growth is slow, more than 96h is needed just to occur bacterial strain Growth positive, substratum 48h of the present invention just can obtain as far as possible bacterial strain positive rate accurately, nocardia asteroide detects reliably, separation rate is high, thus the time is made a definite diagnosis in shortening.
Claims (1)
1. a sputum sample nocardia asteroide Selective agar medium, is characterized in that containing in the formula of preparation 1000ml substratum:
Beef liver powder 5.0 ~ 15.0g;
Fructus Hordei Germinatus leaching powder 2.0 ~ 5.0g;
Yeast extract powder 5.0 ~ 10.0g;
Sodium-chlor 5.0g;
Agar 15.0 ~ 20.0g;
Ferrous porphyrin 0.01 ~ 0.05g;
Calcium lactate 0.01 ~ 0.05g;
Nalidixic acid 0.01 ~ 0.05g;
2-Ethoxymethylene-3,5-dihydroxy-y-pyrone 0.001 ~ 0.005g;
Vitamin K
10.01 ~ 0.1g;
Phosphopeptide caseinate 0.1 ~ 0.5g;
Aseptic defiber Sheep Blood 80 ~ 100ml;
Distilled water adds to 1000ml.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113171382A (en) * | 2021-03-25 | 2021-07-27 | 贵州省中国科学院天然产物化学重点实验室(贵州医科大学天然产物化学重点实验室) | Herba lysimachiae extract and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102559841A (en) * | 2012-03-06 | 2012-07-11 | 王京军 | Nocardia culture medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559841A (en) * | 2012-03-06 | 2012-07-11 | 王京军 | Nocardia culture medium |
Non-Patent Citations (3)
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| 张媛等: "诺卡菌的培养和染色特征研究", 《中国人兽共患病学报》 * |
| 杨模坤等: "马桶花抑菌新活性成分马桶花酮的分离及化学机构", 《药学学报》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113171382A (en) * | 2021-03-25 | 2021-07-27 | 贵州省中国科学院天然产物化学重点实验室(贵州医科大学天然产物化学重点实验室) | Herba lysimachiae extract and preparation method and application thereof |
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