Molecular and virulence characterization of highly prevalent Streptococcus agalactiae circulated in bovine dairy herds.

ABSTRACT: Bovine mastitis caused by Streptococcus agalactiae continues to be one of the major veterinary and economic issues in certain areas of the world. The more prevalent S. agalactiae strains that cause bovine mastitis in China dairy farms belong to a number of bovine-adapted sequence types (STs) ST67, ST103 and ST568. However, it is unknown why these STs can emerge as highly prevalent clones in bovine dairy farms. Here, to determine if a variety of virulence characteristics were associated with these highly prevalent STs, the molecular and virulence characterization of 116 strains isolated from bovine, human, fish and environment were analyzed. Our data showed that all bovine-adapted strains could be assigned to capsular genotype Ia or II, and carried pilus island 2b, and lactose operon. Impor

SUBMITTER: Pang M 

PROVIDER: S-EPMC5644065 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature