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Atypical campylobacters associated with gastroenteritis.

W Tee, B N Anderson, B C Ross

    Journal of Clinical Microbiology
    |July 1, 1987
    PubMed
    Summary

    This study identified novel Campylobacter strains from diarrhea patients, revealing distinct characteristics and potential new species. Further research is needed to understand their clinical significance.

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    Ribosomal RNA Gene Restriction Pattern Analysis (Ribotyping) of H. pylori.

    Methods in molecular medicine·2011

    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Bacteriology

    Background:

    • Campylobacter species are significant causes of bacterial gastroenteritis worldwide.
    • Non-jejuni, non-coli, non-laridis Campylobacter species are less understood but can cause human infections.
    • Accurate identification of Campylobacter strains is crucial for epidemiological studies and patient management.

    Purpose of the Study:

    • To characterize and identify nine non-jejuni, non-coli, non-laridis Campylobacter strains isolated from patients with acute diarrhea.
    • To differentiate these strains from known Campylobacter species using phenotypic and genotypic methods.
    • To investigate the potential for novel Campylobacter species or distinct strains within the genus.

    Main Methods:

    • Isolation of Campylobacter strains from patient samples.
    • Phenotypic characterization using conventional microbiological tests (e.g., hippurate hydrolysis, nitrate reduction, catalase production, antibiotic resistance).
    • Genotypic identification using DNA-DNA dot blotting for relatedness to known Campylobacter type strains.

    Main Results:

    • Three strains were phenotypically and genotypically similar to Campylobacter jejuni.
    • Two strains exhibited weak or negative catalase activity and were hippurate negative.
    • Three strains showed characteristics consistent with Campylobacter cinaedi.
    • One unique strain, isolated from an HIV-positive individual, displayed distinct growth and biochemical properties, differing from all reference strains.

    Conclusions:

    • The study identified diverse Campylobacter strains beyond the common species, highlighting the complexity of the Campylobacter genus.
    • Some strains showed close relation to C. jejuni, while others resembled C. cinaedi.
    • A novel Campylobacter strain with unique characteristics was identified, warranting further investigation and potentially classification as a new species.
    • These findings underscore the importance of comprehensive identification methods for Campylobacter to fully understand their role in human health.

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