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Citrobacter diversus isolated from clinical material.

G Altmann, I Sechter, D Cahan

    Journal of Clinical Microbiology
    |April 1, 1976
    PubMed
    Summary
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    This study analyzed Citrobacter diversus strains from Israeli hospital patients, finding most from urine and wounds. All isolates showed resistance to ampicillin and carbenicillin due to beta-lactamase production.

    Area of Science:

    • Clinical microbiology
    • Bacterial identification and characterization
    • Antimicrobial resistance

    Background:

    • Citrobacter diversus is an opportunistic pathogen.
    • Understanding its prevalence and characteristics is crucial for infection control.
    • Limited data exists on the epidemiology and antimicrobial susceptibility of C. diversus in specific regions like Israel.

    Purpose of the Study:

    • To characterize Citrobacter diversus isolates from a general hospital in Israel.
    • To determine the prevalence of different biotypes and serogroups.
    • To assess the antimicrobial susceptibility patterns, focusing on beta-lactamase production.

    Main Methods:

    • Isolation and biochemical characterization of 47 C. diversus strains from clinical samples over 12 months.

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  • Serological identification of strains to determine O groups.
  • Antimicrobial susceptibility testing against various antibiotics, including assessment for beta-lactamase production.

    • Main Results:

    • Forty-seven C. diversus strains were isolated, primarily from urine (38 strains) and wound discharges.
    • Biochemical analysis revealed five distinct biotypes, with one anaerogenic strain.
    • Serological typing identified strains belonging to seven O groups; all isolates were sensitive to tetracycline and nalidixic acid but resistant to carbenicillin and ampicillin due to beta-lactamase production.

    Conclusions:

    • Citrobacter diversus is an etiological agent in urinary tract and wound infections in the studied hospital.
    • The isolates exhibited significant resistance to beta-lactam antibiotics, mediated by beta-lactamase production.
    • These findings highlight the importance of monitoring C. diversus epidemiology and resistance patterns for effective patient management.