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Related Experiment Videos

Endocarditis due to Citrobacter diversus developing resistance to cephalothin.

D MacCulloch, R Menzies, B M Cornere

    The New Zealand Medical Journal
    |March 9, 1977
    PubMed
    Summary

    A patient with bacterial endocarditis developed cephalothin resistance due to Citrobacter diversus mutants. This highlights the rapid emergence of antibiotic resistance in bacterial infections.

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    Area of Science:

    • Infectious Diseases
    • Microbiology
    • Pharmacology

    Background:

    • Bacterial endocarditis is a serious infection of the heart lining.
    • Antibiotic resistance poses a significant challenge in treating bacterial infections.
    • Citrobacter diversus is an opportunistic pathogen that can cause severe infections.

    Purpose of the Study:

    • To investigate the development of antibiotic resistance in Citrobacter diversus during treatment for bacterial endocarditis.
    • To identify the mechanisms behind cephalothin resistance in Citrobacter diversus.

    Main Methods:

    • Blood cultures and surgical aortic valve cusp samples were analyzed for bacterial isolates.
    • Antibiotic susceptibility testing was performed on Citrobacter diversus isolates.
    • Laboratory experiments were conducted to assess the potential for mutant development.

    Main Results:

    • Citrobacter diversus initially susceptible to cephalothin was isolated from blood cultures.
    • A cephalothin-resistant strain of Citrobacter diversus was isolated from the aortic valve cusps.
    • Laboratory findings confirmed that the blood culture isolate could rapidly produce highly cephalothin-resistant mutants.

    Conclusions:

    • The study demonstrates the rapid emergence of cephalothin resistance in Citrobacter diversus.
    • This highlights the clinical significance of monitoring antibiotic resistance during endocarditis treatment.
    • Understanding resistance mechanisms is crucial for effective antimicrobial therapy.

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