New Sequence Types and Antimicrobial Drug-Resistant Strains of Streptococcus suis in Diseased Pigs, Italy, 2017-2019.

ABSTRACT: Streptococcus suis is a pathogen associated with severe diseases in pigs and humans. Human infections have a zoonotic origin in pigs. To assess circulating strains, we characterized the serotypes, sequence types, and antimicrobial susceptibility of 78 S. suis isolates from diseased farmed pigs in Italy during 2017-2019. Almost 60% of infections were caused by serotypes 1/2 and 9. All but 1 of the serotype 2 and 1/2 isolates were confined to a single cluster, and serotype 9 isolates were distributed along the phylogenetic tree. Besides sequence type (ST) 1, the serotype 2 cluster included ST7, which caused severe human infections in China in 1998 and 2005. A large proportion of serotype 9 isolates, assigned to ST123, were resistant to penicillin. The emergence of this clone threatens the su

SUBMITTER: Cucco L 

PROVIDER: S-EPMC8714200 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature