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Appl Environ Microbiol. 1977 December; 34(6): 745-750

Isolation of Yersinia enterocolitica from well water and growth in distilled water.

ABSTRACT

Yersinia enterocolitica was recovered from well water during a large water-borne outbreak of gastrointestinal illness. Isolates were predominantly Nilehn biotype 1, of which 57% were serologically nontypable. Isolation and enumeration of these Y. enterocolitica strains were made on M-Endo broth. Laboratory studies were conducted on selected isolates to establish the growth of Y. enterocolitica in distilled water and the competitive growth of this organism in various enteric media. Growth was obtained in sterile distilled water without added nutrients at 4, 25, and 37 degrees C. M-Endo medium gave equal or better recovery of Y. enterocolitica in competitive growth studies than did other commonly used enteric media using the membrane filter technique and incubating at 35 degrees C. All well water isolates were confirmed biochemically at 25 and 35 degrees C and serotyped, and antibiotic susceptibility tests were performed.