New enrichment method for isolation of pathogenic Yersinia enterocolitica serogroup O:3 from pork

Appl Environ Microbiol. 1988 Apr;54(4):851-4. doi: 10.1128/aem.54.4.851-854.1988.

Abstract

A new enrichment medium for the recovery of pathogenic Yersinia enterocolitica serogroup O:3 from naturally infected meat products based on three selective agents, Irgasan, ticarcillin, and potassium chlorate (ITC), was compared with several other one- or two-step enrichments. Y. enterocolitica serogroup O:3 was recovered from 96.5% of 29 pork tongues, 24% of 50 ground pork samples, 16% of 25 masseter muscle samples, and 61% of tonsils. ITC was by far the most sensitive method for the recovery of Y. enterocolitica O:3, especially from ground meat and masseter muscles, while cold and two-step enrichments yielded better results for nonpathogenic strains. Plating of ITC enrichments onto SS-deoxycholate-calcium agar gave overall better results than plating onto cefsulodin-Irgasan-novobiocin agar for serogroup O:3.

MeSH terms

  • Animals
  • Food Microbiology*
  • Meat*
  • Muscles / microbiology
  • Palatine Tonsil / microbiology
  • Swine
  • Yersinia enterocolitica / growth & development
  • Yersinia enterocolitica / isolation & purification*
  • Yersinia enterocolitica / pathogenicity