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Related Experiment Videos

Microbiological evaluation of suture items before radiation sterilization.

B O Osterberg

    Applied Microbiology
    |September 1, 1973
    PubMed
    Summary

    Microbiological testing of sutures revealed higher contamination in dry products compared to wet-packaged ones. Fungi were the predominant contaminants, indicating areas for improved sterile manufacturing control.

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    Area of Science:

    • Microbiology
    • Manufacturing Science
    • Sterile Processing

    Background:

    • Surgical sutures require stringent microbial control to prevent healthcare-associated infections.
    • Assessing contamination at various manufacturing stages is crucial for product safety.
    • New hygienic controls necessitate validation of their efficacy.

    Purpose of the Study:

    • To quantify microbiological contamination in sutures during manufacturing.
    • To evaluate the impact of manual handling on suture contamination.
    • To assess the effectiveness of hygienic controls in a new manufacturing plant.

    Main Methods:

    • Membrane filtration technique used for microbiological analysis.
    • Suture samples analyzed at raw material, in-process, and finished product stages.
    • Comparison of contamination levels between dry and wet-packaged sutures (isopropyl alcohol-based fluid).

    Main Results:

    • Dry sutures averaged 2.1–14.8 contaminants/suture (n=1,787), while wet sutures averaged 0.7–4.2 contaminants/suture (n=2,980).
    • Maximum individual suture contamination: 400 (dry) and 89 (wet).
    • Fungi predominated, with spore-forming rods as the main bacterial contaminants.

    Conclusions:

    • Wet packaging significantly reduced microbial contamination compared to dry sutures.
    • Fungal contamination is a key concern in suture manufacturing.
    • Continuous monitoring and improved handling are essential for sterile suture production.

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