SRI and infection: All the Brazilian isolates were negative for genes carried on mobile genetic elements and usually present in isolates involved in human infections, such as chp, scn, and sak. Moreover, they were negative for tsst, eta, mecA, and sec, sed, sel, sej. Out of 15 isolates, 5 (33.3%) were positive for seh, 8 (53.3%) for both sea and seh, while a single isolate (6.6%) harboured other 2 enterotoxin genes (seg, sei).