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Related Experiment Videos

Rapid microbiological assay for 5-fluorocytosine.

D J Schiavone, M D Page, J K Dawborn

    British Medical Journal
    |November 17, 1973
    PubMed
    Summary

    A new microbiological assay accurately measures 5-fluorocytosine levels by monitoring pH changes caused by Candida albicans. This method provides reproducible results for serum and urine drug concentrations within four hours.

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    Molecular microbiology·2000

    Area of Science:

    • Microbiology
    • Clinical Chemistry
    • Pharmacology

    Background:

    • 5-fluorocytosine is an antifungal agent used to treat Candida infections.
    • Monitoring drug levels is crucial for optimizing therapy and minimizing toxicity.
    • Existing methods for quantifying 5-fluorocytosine may be complex or time-consuming.

    Purpose of the Study:

    • To develop and validate a novel microbiological assay for determining 5-fluorocytosine concentrations.
    • To establish a rapid and reproducible method for measuring drug levels in biological fluids.

    Main Methods:

    • A microbiological assay was designed utilizing the inhibition of pH drop by 5-fluorocytosine.
    • The assay employs Candida albicans as the test microorganism in a synthetic liquid culture medium.
    • Drug levels were quantified by measuring the inhibition of pH change.

    Main Results:

    • The assay demonstrated reproducibility in measuring serum and urine levels of 5-fluorocytosine.
    • Accurate drug quantification was achievable within a four-hour timeframe.
    • The method relies on the drug's ability to inhibit the pH decrease induced by Candida albicans.

    Conclusions:

    • A validated microbiological assay for 5-fluorocytosine has been successfully developed.
    • This assay offers a reliable and efficient method for therapeutic drug monitoring.
    • The assay's speed and reproducibility make it suitable for clinical application.

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