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Pseudomonas resistance due to inactivated susceptibility disks

L J Griffith

    Antimicrobial Agents and Chemotherapy
    |December 1, 1973
    PubMed

    Insights

    Carbenicillin deterioration mirrors other penicillins. Improper storage and humidity exposure during susceptibility testing can lead to inaccurate false resistance results, necessitating correct handling.

    Area of Science:

    • Microbiology
    • Pharmaceutical Science

    Background:

    • Carbenicillin, a penicillin antibiotic, is susceptible to degradation.
    • Penicillin-class antibiotics share common degradation pathways.

    Purpose of the Study:

    • To investigate the deterioration patterns of carbenicillin.
    • To assess the impact of environmental factors on carbenicillin stability.
    • To evaluate the reliability of susceptibility testing under suboptimal conditions.

    Main Methods:

    • Comparative analysis of carbenicillin degradation with other penicillins.
    • Assessment of susceptibility testing using humidity-exposed disks.
    • Evaluation of storage and handling protocols.

    Main Results:

    • Carbenicillin exhibits degradation kinetics similar to other penicillins.
    • Humidity exposure of susceptibility disks can yield false-resistant interpretations.
    • Optimal storage and handling are crucial for maintaining drug integrity.

    Conclusions:

    • Carbenicillin stability is comparable to other penicillins.
    • Accurate antibiotic susceptibility testing requires controlled environmental conditions.
    • Adherence to proper storage and handling procedures is essential for reliable clinical outcomes.

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