The first pathogenicYersinia enterocoliticabioserotype 4/O:3 strain isolated from a hunted wild boar (Sus scrofa) in Poland

Abstract

SUMMARYThe objective of this study was to identify the bioserotypes and virulence markers ofYersinia enterocoliticastrains isolated from wild boars in Poland. Bacteriological examination of 302 rectal swabs from 151 wild boars resulted in the isolation of 40Y. enterocoliticastrains. The majority of the examined strains (n= 30), belonged to bioserotype 1A/NI. The presence of individualY. enterocoliticastrains belonging to bioserotypes 1B/NI (3), 1A/O:8 (2), 1A/O:27 (2), 2/NI (1), 2/O:9 (1) and 4/O:3 (1) was also demonstrated. Amplicons corresponding toailandystAgenes were observed only in oneY. enterocoliticastrain – bioserotype 4/O:3. TheailandystBgene amplicons were noted in 11Y. enterocoliticabiotype 1A strains, although single amplicons ofystBgene were found in 28 of the tested samples. In four out of eight cases when twoY. enterocoliticastrains were isolated from the same animal, the strains differed in biotype, serotype or virulence markers. The European population of wild boars continues to grow and spread to new areas, therefore, wild boars harbouring potentially pathogenicY. enterocolitica4/O:3 strains pose a challenge to public health.