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Acta Veterinaria Scandinavica logoLink to Acta Veterinaria Scandinavica
. 1985 Mar 1;26(1):13–20. doi: 10.1186/BF03546560

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

Truls Nesbakken 1,
PMCID: PMC8202719  PMID: 4036749

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.

Keywords: Yersiniae, enterotoxigenicity, serotype, biotype, food intoxication

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