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Staphylococcus epidermidis biotype 4: epidemiological conclusions from five different typing methods

P M Tierno, G Stotzky

    Annals of Clinical and Laboratory Science
    |September 1, 1978
    PubMed
    Summary
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    Identifying individual Staphylococcus epidermidis strains is crucial for epidemiology. Serotyping and aminopeptidase profiling are the most effective methods for strain differentiation, aiding in infection control.

    Area of Science:

    • Microbiology
    • Epidemiology
    • Clinical Diagnostics

    Background:

    • Staphylococcus epidermidis is a common cause of hospital-acquired infections.
    • Accurate strain identification is essential for tracking infection transmission and implementing control measures.
    • Current methods for differentiating S. epidermidis strains are limited.

    Purpose of the Study:

    • To evaluate and compare the epidemiological efficacy of five different methods for typing Staphylococcus epidermidis strains.
    • To determine the most reliable methods for individual strain identification in a clinical setting.

    Main Methods:

    • Comparison of biotyping, serotyping, proteinase grouping, aminopeptidase profiling, and antibiograms.
    • Assessment of each method's ability to distinguish between individual S. epidermidis strains.

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  • Application of selected typing methods in a one-year hospital-based epidemiological study.

    • Main Results:

    • Biotyping and proteinase grouping offered limited strain discrimination but were useful for initial categorization.
    • Antibiograms showed low discriminatory power due to similar susceptibility patterns among isolates.
    • Serotyping and aminopeptidase profiling demonstrated the highest efficacy in identifying individual S. epidermidis strains for epidemiological purposes.

    Conclusions:

    • Serotyping and aminopeptidase profiling are recommended as the most effective methods for epidemiological typing of Staphylococcus epidermidis.
    • These methods can reliably differentiate strains, aiding in the investigation of outbreaks and the implementation of targeted infection control strategies.