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Chloramphenicol bioassay.

R M Bannatyne, R Cheung

    Antimicrobial Agents and Chemotherapy
    |July 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    A new plate diffusion bioassay accurately measures chloramphenicol using Beneckea natriegens. This sensitive method, effective with capillary blood, offers rapid and reliable antibiotic quantification.

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    Area of Science:

    • Microbiology
    • Analytical Chemistry
    • Pharmacology

    Background:

    • Accurate quantification of antibiotics like chloramphenicol is crucial for therapeutic drug monitoring and infection control.
    • Existing bioassays may lack sensitivity, speed, or require large sample volumes.
    • Development of a rapid, sensitive, and blood-based assay is needed.

    Purpose of the Study:

    • To describe a novel and accurate plate diffusion bioassay for chloramphenicol.
    • To establish the sensitivity, speed, and reliability of this new assay.
    • To assess the feasibility of using capillary blood for chloramphenicol quantification.

    Main Methods:

    • Utilized the fast-replicating bacterium Beneckea natriegens in a 1.5% salt agar medium.
    • Employed a plate diffusion technique to measure zones of inhibition.

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  • Investigated the assay's sensitivity and the effect of co-administered gentamicin.

    • Main Results:

    • Achieved well-defined zones of inhibition within 3 hours.
    • Demonstrated a limit of sensitivity of approximately 2 µg/ml for chloramphenicol.
    • Confirmed that the presence of gentamicin did not interfere with the assay.
    • Showcased the assay's efficiency, requiring only 100 µg of capillary blood for duplicate measurements.

    Conclusions:

    • The described plate diffusion bioassay provides an accurate and sensitive method for chloramphenicol determination.
    • The assay is rapid, reliable, and suitable for use with small volumes of capillary blood.
    • This method offers a practical approach for clinical and research applications requiring chloramphenicol quantification.