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Anaerobes in human biliary tracts.

D M England, J E Rosenblatt

    Journal of Clinical Microbiology
    |November 1, 1977
    PubMed
    Summary

    Anaerobic bacteria are frequently found in biliary tract infections, often in mixed cultures. This highlights the importance of considering anaerobes in antimicrobial therapy for these infections.

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    Area of Science:

    • Microbiology
    • Infectious Diseases
    • Surgical Infections

    Background:

    • Biliary tract surgery is a common procedure.
    • Infections of the biliary tract can be polymicrobial.
    • The role of anaerobic bacteria in biliary tract infections requires further investigation.

    Purpose of the Study:

    • To determine the prevalence of anaerobic bacteria in patients undergoing biliary tract surgery.
    • To identify common anaerobic and aerobic organisms isolated from bile cultures.
    • To inform antimicrobial therapy strategies for biliary tract infections.

    Main Methods:

    • Prospective collection of bile samples from 371 patients undergoing biliary tract surgery.
    • Aerobic and anaerobic culture techniques were employed.
    • Identification and quantification of isolated microorganisms.

    Main Results:

    • Bile cultures were positive in 69% of patients.
    • Anaerobes were isolated in 41% of positive cultures, frequently in mixed infections.
    • Bacteroides fragilis was the most common anaerobe, followed by Pseudomonas aeruginosa and Clostridium perfringens.
    • Escherichia coli, group D streptococci, and Klebsiella were the most common aerobes.

    Conclusions:

    • Anaerobic bacteria are frequently present in patients with bactibilia.
    • Antimicrobial therapy for biliary tract infections should consider the potential involvement of anaerobes.
    • Comprehensive culture techniques are essential for effective treatment.

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