2016 Volume 69 Issue 8 Pages 475-480
Fifty-eight Salmonella Infantis isolated between 1998 and 2015 in Niigata Prefecture were classified by the PFGE pattern and microbial drug resistance profile. Of these fifty-eight strains, 32 were classified by the PFGE pattern, and 11 were classified by the antibiotic drug resistance profile. In regards to the 32 PFGE types, 3 PFGE types were further subdivided by the antibiotic drug resistance profile, and 58 strains were classified in 36 subtypes using typing combined with the PFGE pattern and the antibiotic resistance pattern. Because strains from human beings, broilers, and pigs were classified in the same subtype, it suggests that chicken and pork are potential sources of S. Infantis infection in humans. There were no strains from layers classified in the same strain subtype from humans, but some strains were identified genetically as closely related subtypes to the strains from humans. These results suggest that chicken eggs can be one source of S. Infantis infection in humans.
