Occurrence and Genetic Correlations of spp. Isolated from Commensal Rodents in Northeastern Poland.

Rodents can be a potential spp. vector responsible for farm facilities contamination. The aim of the study was to determine the prevalence of spp. in commensal rodents found in the farms and fodder factory areas to characterize the obtained isolates and epidemiological risk. Intestinal samples were subjected to bacteriological, bioserotype, and PCR examination for virulence markers and presence. spp. was isolated from 43 out of 244 (17.6%) rodents ( n = 132, n = 102, n = 8, n = 2). was isolated from 41 rodents (16.8%), and from one and one . In three cases, two isolates were obtained from one rodent. All contained and belonged to biotype 1A, considered as potentially pathogenic. One isolate additionally had the gene typical for pathogenic strains. The sequence analysis of the and fragments showed a high similarity to those from clinical cases. The current study revealed a high prevalence of among commensal rodents, but the classification of all of isolates into biotype 1A and the sporadic isolation of do not indicate a high epidemiological risk.