Dataset Information

Use of the omp50 gene for identification of Campylobacter species by PCR.

ABSTRACT: We studied the prevalence of the omp50 gene and the Omp50 protein in Campylobacter strains. Immunodetection assays and DNA-DNA hybridizations showed that most C. coli strains tested were negative and most C. jejuni and C. lari strains tested were positive. A PCR assay was developed, using the omp50 gene as a species-specific target. We propose a combination of a hippurate test and an omp50 assay to perform identification of Campylobacter species.

SUBMITTER: Dedieu L

PROVIDER: S-EPMC404618 | biostudies-literature | 2004 May

REPOSITORIES: biostudies-literature

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Use of the omp50 gene for identification of Campylobacter species by PCR.

Dedieu Luc L Pagès Jean-Marie JM Bolla Jean-Michel JM

Journal of clinical microbiology 20040501 5

We studied the prevalence of the omp50 gene and the Omp50 protein in Campylobacter strains. Immunodetection assays and DNA-DNA hybridizations showed that most C. coli strains tested were negative and most C. jejuni and C. lari strains tested were positive. A PCR assay was developed, using the omp50 gene as a species-specific target. We propose a combination of a hippurate test and an omp50 assay to perform identification of Campylobacter species. ...[more]

PMID: 15131219

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Project description:This study reports on the use of PCR to directly detect and distinguish Campylobacter species in bovine feces without enrichment. Inhibitors present in feces are a major obstacle to using PCR to detect microorganisms. The QIAamp DNA stool minikit was found to be an efficacious extraction method, as determined by the positive amplification of internal control DNA added to bovine feces before extraction. With nested or seminested multiplex PCR, Campylobacter coli, C. fetus, C. hyointestinalis, and C. jejuni were detected in all fecal samples inoculated at approximately 10(4) CFU g(-1), and 50 to 83% of the samples inoculated at approximately 10(3) CFU g(-1) were positive. At approximately 10(2) CFU g(-1), C. fetus, C. hyointestinalis, and C. jejuni (17 to 50% of the samples) but not C. coli were detected by PCR. From uninoculated bovine feces, a total of 198 arbitrarily selected isolates of Campylobacter were recovered on four commonly used isolation media incubated at three temperatures. The most frequently isolated taxa were C. jejuni (152 isolates) and C. lanienae (42 isolates), but isolates of C. fetus subsp. fetus, Arcobacter butzleri, and A. skirrowii also were recovered (</=2 isolates per taxon). Considerable variability was observed in the frequency of isolation of campylobacters among the four media and three incubation temperatures tested. With genus-specific primers, Campylobacter DNA was detected in 75% of the fecal samples, representing an 8% increase in sensitivity relative to that obtained with microbiological isolation across the four media and three incubation temperatures tested. With nested primers, C. jejuni and C. lanienae were detected in 25 and 67% of the samples, respectively. In no instance was DNA from either C. coli, C. fetus, or C. hyointestinalis detected in uninoculated bovine feces. PCR was more sensitive than isolation on microbiological media for detecting C. lanienae (17%) but not C. jejuni. Campylobacters are a diverse and fastidious group of bacteria, and the development of direct PCR not only will increase the understanding of Campylobacter species diversity and their frequency of occurrence in feces but also will enhance the knowledge of their role in the gastrointestinal tract of livestock and of the factors that influence shedding.

Dataset Information

Use of the omp50 gene for identification of Campylobacter species by PCR.

Publications

Use of the omp50 gene for identification of Campylobacter species by PCR.

Similar Datasets

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