Comparative studies on the isolation of "sublethally injured" salmonellae in nine European laboratories.

  • 1 January 1973
    • journal article
    • research article
    • Vol. 48  (2) , 167-74
Abstract
Artificially or naturally contaminated minced meat samples were distributed to nine laboratories and the isolation rates obtained using standardized pre-enrichment and direct enrichment methods were compared. In all laboratories the pre-enrichment method gave higher isolation rates but the difference was less marked with the naturally contaminated samples. Extending the duration of incubation of the liquid enrichment medium to 48 h and making a second subculture improved the isolation rates. The results obtained with selective plates of the laboratories' own choice were unexpectedly poor in comparison with the standard method.