2013 Volume 66 Issue 2 Pages 138-142
A total of 101 β-hemolytic streptococci isolates including 91 Streptococcus dysgalactiae subsp. equisimilis (S. equisimilis) and 10 Streptococcus porcinus (S. porcinus) were obtained from septicemia-type verrucous endocarditis samples of pigs slaughtered in Kagoshima Prefecture. These S. equisimilis isolates were categorized into Lancefield group C (74 isolates) and untypable (17 isolates). Antimicrobial strains for amynoglycosides, tetracyclines, and macrorides were 72 (79.1%), 74 (81.3%), and 38 (41.8%), respectively. Nineteen aminoglycosides-resistant isolates harbored the aph (3')- III a gene. The tet(O) and tet(M) genes were detected from 46 and 17 tetracyclines-resistant isolates, respectively. The ermB and mefA genes were detected from 31 and 6 macrolides-resistant isolates, respectively. Our study demonstrated that S. equisimilis harboring antimicrobial-resistant genes have emerged among pigs in Kagoshima Prefecture.
