Fig. 1

PFGE clustering, API 20 Strep and antimicrobial susceptibility profiles of the S. halichoeri strains studied. Clonal clusters were determined by using an 85% similarity cut-off, which is marked as a dashed vertical line. Isolates designated with a bold font were selected for the phylogenetic analysis of the 16S rRNA and rpoB sequences (Fig. 2). aThe antibiogram is presented in the following order: benzylpenicillin, trimethoprim-sulfamethoxazole, erythromycin, clindamycin and tetracycline