DAŽĀDA JERSĪNIJU SASTOPAMĪBA CŪKU LIEMEŅOS TRIJĀS KAUTUVĒS LATVIJĀ. (Latvian)

DIFFERENT PREVALENCE OF YERSINIAE ON PIG CARCASSES IN THREE SLAUGHTERHOUSES IN LATVIA. (English)

The aim of the present study was to detect yersiniae species and their prevalence on carcasses of slaughter pigs. A total amount of 90 surface swabs of pig carcass were collected in three slaughterhouses in Latvia. All the samples were tested with direct plating, selective enrichment and cold enrichment according to the ISO and NCFA methods. Colonies, which resembled yersiniae on CIN agar plates, were confirmed with API 20E kit. Y. enterocolitica strains were bio-serotyped. In total, non-pathogenic yersiniae -- Y. enterocolitica biotype 1A, Y. kristesenii and Y. fredriksenii, and pathogenic yersinia -- Y. enterocolitica bioserotype 4/O:3 species and/or bioserotypes were isolated from pig carcasses. The prevalence of non-pathogenic and pathogenic yersiniae on pig carcasses was 52 and 9 %, respectively. Non-pathogenic yersiniae were isolated in all three slaughterhouses, while pathogenic Y. enterocolitica 4/O:3 in two slaughterhouses. In total, the prevalence of yersiniae on carcasses was 56 %, 66 % and 60 % in slaughterhouses A, B and C, respectively. The prevalence of non-pathogenic yersiniae in slaughterhouses B and C was significantly higher than in slaughterhouse A (p<0.05). The prevalence of pathogenic yersiniae was significantly higher in slaughterhouse A, than is slaughterhouses B and C (p<0.05). [ABSTRACT FROM AUTHOR]

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