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  • Title: Evaluation of swab transport systems against a published standard.
    Author: Human RP, Jones GA.
    Journal: J Clin Pathol; 2004 Jul; 57(7):762-3. PubMed ID: 15220372.
    Abstract:
    BACKGROUND: Before the publication of the M40-A standard by the United States National Committee for Clinical Laboratory Standards (NCCLS), no quality control data for swab transport systems (STSs) had been available. AIMS: To compare three commercially available STSs against the published standard to ascertain bacterial survival after a set holding time. METHOD: Charcoal and non-charcoal containing swabs were inoculated with standard volumes and numbers of a range of bacteria commonly isolated from clinical material. Bacterial counts were taken at time zero, six, 24, and 48 hours, with the results being compared against the NCCLS standard. RESULTS: The standard clearly differentiated between the three STSs tested, with one product being superior to the other two products in providing better survival. CONCLUSION: The standard now provides manufacturers and users of STSs with meaningful data to provide, purchase, and compare an STS for routine clinical use.
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