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Enterotoxin Production at 4, 22, And 37°C by Yersinia Enterocolitica and Yersinia Enterocolitica-Like Bacteria Isolated from Porcine Tonsils and Pork Products

Enterotoksinproduksjon ved 4, 22 og 37°C hos Yersinia enterocolitica og Yersinia enterocolitica-lignende bakterier isolert fra tonsiller hos gris og matvarer med svinekjøtt som vesentlig bestanddel

Acta Veterinaria Scandinavica volume 26, pages 13–20 (1985)Cite this article

Abstract

Altogether, 71 strains of Yersinia enterocolitica and Yersinia enterocolitica-like bacteria from porcine tonsils and pork products were examined for their ability to produce enterotoxin using the infant mouse assay. Of these, 37 strains (52.1 %) produced enterotoxin at 22 °C, 3 were positive at 4 and 22 °C, and 1 was enterotoxigenic at 22 and 37°C. No strain was positive at all 3 temperatures. The highest prevalence of enterotoxin production at 22°C was detected in serotype 0:11 (80.0%), followed by 0:3/ biotype 4 (74.2 %), and 0:12 (66.7 %). Enterotoxin production at 4°C was recorded in 2 (15.4 %) of the Yersinia kristensenii strains (0:11, 0:12) and 1 of the Yersinia enterocolitica strains, (0:3) examined. One Yersinia kristensenii strain (0:11) was enterotoxigenic at 37 °C. The results indicate that enterotoxin production is a common feature of yersiniae isolated from porcine tonsils and pork products in Norway and may represent a possible source of food borne intoxication.

Sammendrag

I alt ble 71 stammer av Yersinia enterocolitica og Yersinia enterocolitica-lignende bakterier undersøkt for enterotoksinproduksjon in vitro (infant mouse assay). Trettisju (52,1 %) av stammene produserte enterotoksin ved 22° C, og 3 av dem ved 4 og 22° C, mens 1 stamme var enterotoksinproduserende ved 22 og 37°C. Høyeste frekvens av enterotoksinproduserende stammer ved 22°C ble funnet innen serotype 0:11 (80,0%), etterfulgt av 0:3/biotype 4 (74,2%) og 0:12 (66,7%). Enterotoksinproduksjon ved 4°C ble funnet hos 2 av Yersinia kristensenii — stammene (0:11, 0:12) og 1 av Yersinia enterocolitica — stammene (0:3) som ble undersøkt. En Yersinia kristensenii — stamme (0:11) var positiv ved 37°C. Resultatene viser at enterotoksinproduksjon er svært vanlig hos Yersinia-bakterier isolert fra svinetonsiller og matvarer med svinekjøtt som vesentlig bestanddel i Norge.

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  1. Department of Food Hygiene, Norwegian College of Veterinary Medicine, P. O. Box 8146, Dep., 0033, Oslo 1, Norway

    Truls Nesbakken

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  1. Truls Nesbakken
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Nesbakken, T. Enterotoxin Production at 4, 22, And 37°C by Yersinia Enterocolitica and Yersinia Enterocolitica-Like Bacteria Isolated from Porcine Tonsils and Pork Products. Acta Vet Scand 26, 13–20 (1985). https://doi.org/10.1186/BF03546560

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  • DOI: https://doi.org/10.1186/BF03546560

Keywords

  • Yersiniae
  • enterotoxigenicity
  • serotype
  • biotype
  • food intoxication

Acta Veterinaria Scandinavica

ISSN: 1751-0147