WO1999007722A1 - Oligonucleotide specifique de l'espece escherichia coli et procede de detection et de visualisation des bacteries de cette espece - Google Patents
Oligonucleotide specifique de l'espece escherichia coli et procede de detection et de visualisation des bacteries de cette espece Download PDFInfo
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- WO1999007722A1 WO1999007722A1 PCT/FR1998/001737 FR9801737W WO9907722A1 WO 1999007722 A1 WO1999007722 A1 WO 1999007722A1 FR 9801737 W FR9801737 W FR 9801737W WO 9907722 A1 WO9907722 A1 WO 9907722A1
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- oligonucleotide
- hybridization
- coli
- species
- shigella
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- 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
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
- C12Q1/689—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for bacteria
Definitions
- the invention relates to oligonucleotides for the detection and visualization of bacteria belonging to the genomic species Escherichia coli in a sample. More particularly, it relates to an oligonucleotide capable of hybridizing specifically with ribosomal RNA (rRNA) or with the corresponding gene (rDNA ) of the genomic species Escherichia coli (including Shigella with the exception of S boydu serotype 13) I Escherichia fergusonii
- a genomic species is a set of strains whose deoxy ⁇ bonucleic acid (DNA) has a homology of more than 70% with the DNA of the type strain of the species considered with a thermal instability of the hybrid DNA of less than 5 ° C. (Grimont, 1988, Wayne et al, 1987) According to these criteria, the genomic species E.
- E. coli is usually a commensal bacteria from the colon of humans and warm-blooded animals. For this reason, its presence in a sample of water, food, or the environment, is interpreted as an indication of faecal contamination (indicator bacteria).
- a food product must not contain more than a certain number of living E. coli cells (which can form a colony on a solid culture medium) in a defined mass of product (these numbers vary according to the products).
- E. coli cells which can form a colony on a solid culture medium
- drinking water should not contain a living E. coli cell in 100 ml (De Zuane, 1997).
- the enumeration of E. coli is essential to assess the hygienic quality of a food.
- E. coli can be pathogenic. Among these strains are all that is commonly called Shigella, agent of human bacillary dysentery. The strains commonly called E. coli, can cause different infections of humans or animals depending on the pathogenicity equipment (urinary tract infections, choleriform or hemorrhagic diarrhea, dysenteric syndrome, hemolytic uremic syndrome, sepsis, neonatal meningitis, infections various purulent).
- pathogenicity equipment urinary tract infections, choleriform or hemorrhagic diarrhea, dysenteric syndrome, hemolytic uremic syndrome, sepsis, neonatal meningitis, infections various purulent.
- the identification of a strain of the genomic species E. coli is important to suspect or demonstrate fecal contamination of water or food. It is also important in the case where the bacteria is isolated from a normally sterile or almost sterile biological medium (urine, blood, cerebrospinal fluid, fluid collection in a tissue or in a closed space of the body) In the open spaces of the body (digestive tract) or faeces, the presence of E. coli is commonplace and the identification of the pathogenicity factors of E. coli takes precedence over taxonomic identification. ' The taxonomic identification of E. coli is conventionally based on the isolation and culture of the bacteria on a solid agar medium and the application of some biochemical tests.
- Ribosomal nucleic acids may or may not have a sequence complementary (target) to the probe, the probe will bind to its target and will not be removed by washing. The bacteria which have thus retained the probe become marked (for example, fluorescent) and visible by microscopic examination.
- Ribosomal ribosomal acids (rRNA) constitute the preferred target in in situ hybridization because of the number of copies per cell (10,000 to 30,000), higher than the number of copies of messenger RNA after induction (100 to 200) or of a given gene (one to a few).
- ribosomal RNAs are identified according to their sedimentation constant (for bacteria: 5S, 16S and 23 S), present in the small subunit (16S rRNA) or the large subunit (23 S and RNA 5 S) of the ribosome.
- rRNAs 16S (approximately 1500 nucleotides) and 23S (approximately 3000 nucleotides).
- a nucleic acid probe complementary to part of an rRNA will be able to hybridize with this rRNA but also with the complementary strand of the gene (rDNA) which coded this rRNA.
- rDNA complementary strand of the gene
- rRNAs have in fact appeared as the most suitable molecules to serve as a molecular chronometer for the evolution of bacteria (Brenner et al., 1969; Doi & Iragashi, 1965; Moore and McCarthy, 1967; Pace & Campbell, 1971; Takahashi et al., 1967).
- the primary structure (sequence) of rRNAs contains highly conserved regions and others which are hypervariable (Sogin et al., 1972; Woese et al., 1975).
- the result greatly depends on the temperature and the molarity of sodium ions in the reaction medium.
- an optimal hybridization temperature is defined. If the temperature is raised, the reassociated strands will eventually separate. The temperature necessary for this separation depends on the length of the perfectly hybridized sequence part (perfect pairing) and on its nucleotide composition. A temperature allowing only the hybridization of the longest sequences is said to be restrictive (as opposed to optimal). Mismatches during hybridization cause the thermal stability of the hybridized molecules to drop.
- in situ hybridization will therefore depend on the quality of the probe capable of recognizing and hybridizing with a complementary sequence present in an rRNA.
- Galpin et al. (1981) used hybridization of genes encoding rRNA to detect Mycoplasma pidmonis infections in mice.
- US 4,851,330 describes a strategy for obtaining nucleic acid fragments which can be used as a probe reacting with rRNAs
- WO-A-84/02721 describes methods for detecting microorganisms infecting a human or animal body, using probes which hybridize with rRNAs. There is no guidance on how to detect or identify E. coli.
- French patent 2,596,774 proposes the use of an oligonucleotide complementary to bacterial rRNA as a probe and describes two universal oligonucleotide probes.
- the invention provides an oligonucleotide for the specific and rapid detection and visualization of bacteria belonging to the genomic species Escherichia coli in a sample. It therefore relates to an oligonucleotide capable of carrying out specific hybridization with
- this oligonucleotide is capable of hybridizing with the region 637-660 of the 16S RNA of E. coli ⁇ system of
- the oligonucleotide according to the invention may also specifically hybridize only to at least 10 consecutive nucleotides of the region 637-660 of the 16S RNA of E. coli. Indeed, with two oligonucleotides recognizing adjacent zones and then linked by a ligase, we obtain a longer oligonucleotide and therefore more
- the oligonucleotide according to the invention corresponds to SEQ ID No. 1.
- an oligonucleotide of 24 nucleotides, complementary to the above region 637-660 of the 16S RNA of E. coli has been synthesized. It was called Ec637 and identified SEQ ID N ° 1.
- the labeling was obtained by grafting two chromophores (fluorescein or Texas Red) at each end of the oligonucleotide.
- the probe oligonucleotide used in in situ hybridization at 42 ° C in the presence of 22% formamide followed by washing at 60 ° C, fluoresces the cells of Escherichia coli, Shigella dysenteriae, Shigella ⁇ exneri, Shigella boydii (except the serotype 13), Shigella rings i and Escherichia fergusonii (genomic group E. coli). It does not react with most of the other species and genera tested. However, it has been observed that the Citrobacter koseri species and the Cedecea species remain fluorescent after washing at 60 ° C.
- the present invention therefore also relates to an oligonucleotide enabling even better results in terms of specificity to be obtained.
- the oligonucleotide Ec637 was modified at the level of a nucleotide located at a conserved position (invariant) of the corresponding 16S rRNA sequence to create a voluntary mismatch.
- This mismatch was carried out in the central part of the oligonucleotide.
- the sequence obtained was called Colinsitu and identified SEQ TD N ° 2.
- the purpose of introducing a central mismatch is to weaken the hybrid that will be obtained. If a sequence differs by a single nucleotide from the sequence 637 to 660 of E. coli, this will cause two mismatches with the Colinsitu probe which will not hybridize under the experimental conditions chosen. This probe remains reactive towards the genomic species E. coli and becomes inactive towards all the other species and genera. This specificity is maintained over a wide range of washing temperatures from 51 ° C to 59 ° C.
- the Colinsitu probe can be used in situ hybridization but also in hybridization on a filter, in a liquid medium, in reverse hybridization, or as a specific primer in a gene amplification system.
- the invention also relates to oligonucleotides complementary to the oligonucleotides described below.
- oligonucleotides according to the invention can be labeled at their 3 'or 5' end or at the 3 'and 5' ends.
- the advantage of this probe is to be able to detect, identify, and count the cells of the genomic species E. coli in various samples such as clinical and veterinary samples (especially urine), water and other drinks, food, environment.
- the subject of the invention is also a method for detecting and visualizing bacteria of the genomic species Escherichia coli (including all Shigella with the exception of S.
- RNA of bacteria of said genomic species comprising a step of hybridization of the ribosomal RNA of bacteria of said genomic species with an oligonucleotic according to the invention, and more particularly with an oligonucleotic chosen from SEQ ID N ° 1 and SEQ ED N ° 2.
- the hybridization in question can be an in situ hybridization, a hybridization on a filter, a hybridization in a liquid medium or a reverse hybridization.
- reverse hybridization for the purposes of the present invention is meant a hybridization reaction in which the oligonucleotide probe of interest is immobilized on a support, the nucleic acid to be detected and / or the organism containing the nucleic acid to be detected being present in solution.
- the oligonucleotide probes can be implemented within a detection device comprising a matrix library of oligonucleotides.
- a matrix bank may consist of a matrix of probe oligonucleotides fixed on a support, the sequence of each probe of a given length being located one or more bases offset from the probe. previous, each probe of the matrix arrangement thus being complementary to a distinct sequence of the target DNA or RNA to be detected and each probe of known sequence being attached at a predetermined position of the support.
- the target sequence to be detected can advantageously be radioactive or non-radioactive. When the labeled target sequence is brought into contact with the matrix device, this forms hybrids with the probes of complementary sequences. A nuclease treatment, followed by washing, eliminates the probe-target sequence hybrids that are not perfectly complementary.
- An alternative to the use of a labeled target sequence may consist of the use of a support allowing “bioelectronic” detection of the hybridization of the target sequence on the probes of the matrix support, when said support consists or comprises a material capable of acting, for example, as an electron donor at the positions of the matrix at which a hybrid has been formed.
- a support consists or comprises a material capable of acting, for example, as an electron donor at the positions of the matrix at which a hybrid has been formed.
- Such an electron donor material is for example gold.
- the invention also relates to the use of an oligonucleotide corresponding to SEQ ID No. 1 or SEQ ID No. 2 or different from SEQ ID No.
- No. 1 with a nucleotide or a complementary oligonucleotide as a primer for the implementation of a gene amplification method, such as PCR.
- the oligonucleotides in accordance with the invention can also be used in a method of inhibiting hybridization.
- a support filter, cup or microchip
- a Identical or homologous oligonucleotide of region 637-660 of E. coli 16S RNA and labeling in any way an oligonucleotide complementary to this region according to the present invention.
- the two oligonucleotides must re-associate completely.
- the introduction into the system of a nucleic acid capable of reassociating with one or other of the nucleotides inhibits the binding of the free, labeled oligonucleotide according to the invention to the support.
- the present invention also relates to a method of detection and visualization of microorganisms by hybridization making it possible to optimize the specificity of the oligonucleotide probe used. Indeed, an oligonucleotide is all the more specific as it presents clear differences in its hybridization capacities with on the one hand the target sequences and on the other hand the other sequences.
- this difference is all the more detectable as there are differences in sequences (or mismatch) between the aforementioned oligonucleotide and the sequence with which it is capable of hybridizing. Consequently, it becomes advantageous to artificially increase the number of these mismatches by modifying the oligonucleotide used for hybridization at the level of a nucleotide generally very conserved at the level of the sequence which it is sought to detect.
- the present invention relates to a method for detecting and visualizing microorganisms (or a group of microorganisms) by hybridization using an oligonucleotide complementary to the target sequence of the microorganism with the exception of a nucleotide located in the central part of said oligonucleotide.
- the nucleotide in question is located at an invariant position of the target sequence of the microorganisms and is preferably in the central position.
- the non-complementary nucleotide is
- nucleotide 10 located between positions 7 and 13 inclusive according to a numbering of the oligonucleotide starting at its N-terminal end, preferably, the nucleotide in question is located at position 10.
- the invention therefore relates to a detection and visualization method as described above, applied to bacteria of the genomic species Escherichia coli (including all Shigella with the exception of S. boydii serotype 13) / Escherichia fergusonii.
- the complementary oligonucleotide used in the above method is an oligonucleotide in accordance with the present invention which does not differ from SEQ ID NO: 1
- No. 1 only with a nucleotide and preferably corresponding to SEQ ID No.
- E. coli infected patients or animals.
- Most urinary tract infections are due to E. coli and a urinary tract infection or colonization characterized by the presence of more than 1000 or 10 000 bacteria per ml, in situ hybridization with Colinsitu of an appropriate dilution of urine should allow note the presence and enumerate E. coli in the urine in 2 to 3 hours;
- Escherichia coli is the main biological indicator of faecal contamination of water and food. It suffices to filter a known and sufficient quantity of water and to carry out the in situ hybridization on the filters thus obtained. If, using a micrometer and a reticle, we know the filtered volume relative to a surface observed under the microscope, it is possible to quantify the number of E. coli cells in water. In the case of foods which are not filterable and which must not have an E. coli per 25 g, enrichment may be necessary from 25 g of food, the in situ hybridization then carried out on the medium of culture will indicate if E. coli is present.
- the invention is not limited to the above description but encompasses all the variants thereof. The examples below make it possible to understand it better while being mentioned for purely illustrative purposes.
- This Ec465 sequence corresponding to SEQ ID No. 3, was used for the purpose of comparison.
- a published method (Trebesius et al., 1994) was followed with some modifications.
- the cultures were diluted in sterile distilled water to obtain an absorbance at 600 nm of 0.010, and 100 ⁇ l were filtered through PC filters (Millipore, St Quentin-en-Yvelines, France) of 0.22 ⁇ m.
- the fixation was carried out with a 3% aqueous solution of paraformaldehyde.
- the formamide in the hybridization mixture represented 22% of the volume.
- the probe was added at the concentration of 25 pmole.
- Hybridization was performed at 42 ° C for 2 hours. After washing (step determining the specificity: 20 min at 51 ° C for Colinsitu, 60 ° C for Ec637, 48 ° C for Ec465), the filters were placed on glass slides, covered with 5 ⁇ l of Vectashield (Vector Laboratories, Burlingame, CA) and a coverslip.
- the slide-mounted filters were examined by epifluorescence using an Olympus BX60 microscope equipped with a WTBA (for fluorescein) or NG (for Texas Red) filter and a DEI-470 color camera (Optronics).
- the table shows the results obtained in in situ hybridization with the fluorescent probes Colinsitu, Ec637, and Ec465. All tested strains of Escherichia coli, Shigella (except S. boydii serotype 13), and Escherichia fergusonii, are made fluorescent by the hybridization reaction using the Colinsitu probe. No other genomic species reacts.
- the probe is Ec637, a reaction is obtained with Citrobacter koseri and the species of the genus Cedecea.
- the Ec465 probe used in comparison, reacted weakly with E. coli and with strains of Buttiauxella and the experiment was not carried forward.
- agglomerans group II 3123-70 group III (Pantoea dispersa) 1429-71 group IV 1471-71 group V 3482-71 group Vf (Pantoea pineapple) 6070-69 group VU 6003-71 group V ⁇ I 5422-69 group IX 4388- 71 group X 1600-71 group XI 5378-71 group XII 219-71 group X ⁇ i (Pantoea agglomerans) E20
- the "GeneAmp" DNA Amplification Reagent Kit “(Perkin Elmer Cetus, Norwalk, CT) was used according to the manufacturer's instructions, with the DNA polymerase” AmpliTaq 3 "'and a" Thermal Thermal Cycler 480 "thermocycler ( Perkin Elmer Cetus).
- the reaction volume was 100 ⁇ l comprising 10 ⁇ l of buffer, 2.5 units of AmpliTaq, 200 ⁇ M of each nucleotide dATP, dGTP, dCTP, dTTP, 100 pMole of each primer and 30 to 50 ng of total DNA.
- the amplification conditions were as follows: initial denaturation at 94 ° C for 3 minutes, 25 cycles from 60 s to 94 ° C for denaturation, 60 s at 65.5 ° C for reassociation, 120 s at 72 ° C for elongation.
- the amplification product was subjected to electrophoresis in 1.3% agarose (Applégéne, Illkirch, France).
- the expected size of the amplified fragment was about 600 base pairs. The use of this system effectively makes it possible to amplify this fragment specifically for the genomic species Escherichia coli-Shigella-E. fergusonii. EXAMPLE 3 Hybridization on a Filter
- Hybridization on a nitrocellulose, nylon or cellulose filter is a practical method allowing the same probe to be applied to a large number (hundreds) of DNA samples. Hybridization can be done on colonies. In this case, the membrane is applied to colonies, impregnated with sodium hydroxide (lyses the bacteria, destroys the RNA, and denatures the DNA), and brings the labeled probe into the presence of an adequate buffer. After a sufficient exposure time (several hours), the membrane is washed, dried in the oven (to irreversibly fix the DNA), and the labeling is revealed. This method requires having colonies on a dish, but allows to select a reactive colony among thousands. A similar protocol makes it possible to filter 96 samples on a membrane treated in the same way as the colonies.
- a sample is processed to lyse bacteria and extract DNA, it can be denatured and hybridized with a radioactive probe (1251, for example).
- the radioactivity associated with the hybrid DNA can be counted ( ⁇ count) after separation, by chromatography on hydroxyapatite, of the radioactivity associated with the non-hybridized probe.
- Oligonucleotide probes can be fixed on a support (filter, microplate, microchip). Several probes can thus be available on the same support.
- the target gene is amplified and labeled, and the amplicon is put into hybridization conditions with the panel of probes. After washing and revealing the marking, fixing the marking on one of the probes allows identification.
- This approach also allows the simultaneous detection of several organelles when the amplification is carried out on DNA extracted from a plurimicrobial sample (Rijpens et al., 1995).
- the published work uses as a target the intergenic space between the genes coding for the 16S and 23S rRNA, this approach is applicable to the gene coding for the 16S rRNA.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98941537A EP1003765A1 (fr) | 1997-08-04 | 1998-08-04 | OLIGONUCLEOTIDE SPECIFIQUE DE L'ESPECE $i(ESCHERICHIA COLI) ET PROCEDE DE DETECTION ET DE VISUALISATION DES BACTERIES DE CETTE ESPECE |
JP2000506224A JP2001512665A (ja) | 1997-08-04 | 1998-08-04 | 大腸菌種に特異的なオリゴヌクレオチド並びにその種の細菌の検出および視覚化法 |
AU89879/98A AU8987998A (en) | 1997-08-04 | 1998-08-04 | Oligonucleotide specific of the (escherichia coli) species and method for detecting and displaying bacteria of this species |
CA002299599A CA2299599A1 (fr) | 1997-08-04 | 1998-08-04 | Oligonucleotide specifique de l'espece escherichia coli et procede de detection et de visualisation des bacteries de cette espece |
US09/463,419 US6551776B1 (en) | 1997-08-04 | 1998-08-04 | Oligonucleotide specific of the Escherichia coli species and method for detecting and displaying bacteria of this species |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/09961 | 1997-08-04 | ||
FR9709961A FR2766825B1 (fr) | 1997-08-04 | 1997-08-04 | Oligonucleotide specifique de l'espece escherichia coli et procede de detection et de visualisation des bacteries de cette espece |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/463,419 A-371-Of-International US6551776B1 (en) | 1997-08-04 | 1998-08-04 | Oligonucleotide specific of the Escherichia coli species and method for detecting and displaying bacteria of this species |
US10/360,808 Continuation US20040219524A1 (en) | 1997-08-04 | 2003-02-10 | Oligonucleotide specific to the species Escherichia coli and procedure for detecting and visualizing bacteria of this species |
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Publication Number | Publication Date |
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WO1999007722A1 true WO1999007722A1 (fr) | 1999-02-18 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/FR1998/001737 WO1999007722A1 (fr) | 1997-08-04 | 1998-08-04 | Oligonucleotide specifique de l'espece escherichia coli et procede de detection et de visualisation des bacteries de cette espece |
Country Status (7)
Country | Link |
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US (2) | US6551776B1 (fr) |
EP (1) | EP1003765A1 (fr) |
JP (1) | JP2001512665A (fr) |
AU (1) | AU8987998A (fr) |
CA (1) | CA2299599A1 (fr) |
FR (1) | FR2766825B1 (fr) |
WO (1) | WO1999007722A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052034A1 (fr) * | 2000-12-26 | 2002-07-04 | Joji Oshima | Methodes de bioscopie et d'amplification d'acides nucleiques |
EP1464710A3 (fr) * | 2003-04-02 | 2004-12-22 | Canon Kabushiki Kaisha | Sonde et une série de sondes utilisé pour la détection des agents infectueux, un support, et une méthode de criblage genétique |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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NZ552462A (en) * | 2000-07-06 | 2008-09-26 | Bio Merieux | Method for controlling the microbiological quality of an aqueous medium and kit therefor |
JP2005515756A (ja) * | 2001-06-19 | 2005-06-02 | バーミコン アクチェンゲゼルシャフト | 飲料水中の関連細菌を特異的かつ迅速に検出するための方法 |
US8088572B2 (en) * | 2004-05-20 | 2012-01-03 | Aes Chemunex S.A. | Polynucleotides for the detection of Escherichia coli O157:H7 and Escherichia coli O157:NM verotoxin producers |
ATE531818T1 (de) * | 2006-05-02 | 2011-11-15 | Univ Paris Curie | Methode zur bestimmung und auszählung von mikroorganismen |
FR2912424A1 (fr) * | 2007-02-08 | 2008-08-15 | Biomerieux Sa | Milieu de detection et/ou d'identification de bacteries |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084565A (en) * | 1988-08-18 | 1992-01-28 | Gene-Trak Systems | Probes for the specific detection of escherichia coli and shigella |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5541308A (en) * | 1986-11-24 | 1996-07-30 | Gen-Probe Incorporated | Nucleic acid probes for detection and/or quantitation of non-viral organisms |
JPH05192147A (ja) * | 1991-11-15 | 1993-08-03 | Kirin Bibaretsuji Kk | Dna塩基配列の特定方法 |
US5780233A (en) * | 1996-06-06 | 1998-07-14 | Wisconsin Alumni Research Foundation | Artificial mismatch hybridization |
-
1997
- 1997-08-04 FR FR9709961A patent/FR2766825B1/fr not_active Expired - Fee Related
-
1998
- 1998-08-04 EP EP98941537A patent/EP1003765A1/fr not_active Withdrawn
- 1998-08-04 CA CA002299599A patent/CA2299599A1/fr not_active Abandoned
- 1998-08-04 AU AU89879/98A patent/AU8987998A/en not_active Abandoned
- 1998-08-04 WO PCT/FR1998/001737 patent/WO1999007722A1/fr not_active Application Discontinuation
- 1998-08-04 US US09/463,419 patent/US6551776B1/en not_active Expired - Fee Related
- 1998-08-04 JP JP2000506224A patent/JP2001512665A/ja active Pending
-
2003
- 2003-02-10 US US10/360,808 patent/US20040219524A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5084565A (en) * | 1988-08-18 | 1992-01-28 | Gene-Trak Systems | Probes for the specific detection of escherichia coli and shigella |
Non-Patent Citations (1)
Title |
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GENE, vol. 128, 1993, pages 13 - 17, XP002061371 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002052034A1 (fr) * | 2000-12-26 | 2002-07-04 | Joji Oshima | Methodes de bioscopie et d'amplification d'acides nucleiques |
EP1464710A3 (fr) * | 2003-04-02 | 2004-12-22 | Canon Kabushiki Kaisha | Sonde et une série de sondes utilisé pour la détection des agents infectueux, un support, et une méthode de criblage genétique |
US8080381B2 (en) | 2003-04-02 | 2011-12-20 | Canon Kabushiki Kaisha | Infectious etiologic agent detection probe and probe set, carrier, and genetic screening method |
Also Published As
Publication number | Publication date |
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US20040219524A1 (en) | 2004-11-04 |
AU8987998A (en) | 1999-03-01 |
US6551776B1 (en) | 2003-04-22 |
FR2766825B1 (fr) | 2001-04-13 |
EP1003765A1 (fr) | 2000-05-31 |
CA2299599A1 (fr) | 1999-02-18 |
FR2766825A1 (fr) | 1999-02-05 |
JP2001512665A (ja) | 2001-08-28 |
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