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Enterotoxin production at refrigeration temperature byYersinia enterocolitica andYersinia enterocolitica-like bacteria

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Abstract

Enterotoxin production after cultivation for 7 days in a refrigerator (3–6°C) was indicated for 4 of 20 strains ofYersinia enterocolitica andY. enterocolitica-like bacteria, by use of the infant mouse assay. These four strains were isolated from wild-living small mammals and water. Three of these isolates (Y. kristensenii, serogroups 11 and 28) were enterotoxigenic at 22 and 37°C as well as at refrigeration temperature. The remaining strain (Y. enterocolitica sensu stricto, serogroup 6) produced enterotoxin only at refrigeration temperature and at 22°C. The results indicate thatY. enterocolitica andY. enterocolitica-like bacteria may be capable of causing food intoxication after food storage at refrigeration temperature. A potential clinical significance of theY. enterocolitica enterotoxin in cold-blooded animals such as fish is suggested.

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Authors and Affiliations

  1. Norwegian Defence Microbiological Laboratory, National Institute of Public Health, Geitmyrsveien 75, Oslo 4, Norway

    Georg Kapperud

  2. Department of Food Hygiene, Veterinary College of Norway, POB 8146 Oslo dep., Oslo 1, Norway

    Gunnar Langeland

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  1. Georg Kapperud
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  2. Gunnar Langeland
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Kapperud, G., Langeland, G. Enterotoxin production at refrigeration temperature byYersinia enterocolitica andYersinia enterocolitica-like bacteria. Current Microbiology 5, 119–122 (1981). https://doi.org/10.1007/BF01567432

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