Three samples did contain S. aureus, although neither coagulase reactions nor enterotoxin assays were determined. One sample (sample Z) contained levels that by European Commission standards would qualify this cheese as being of unsatisfactory microbial quality. Other investigators, however, that also reported the presence of S. aureus in raw milk cheeses noted that that none of the 33 S. aureus isolates produced enterotoxins. In contrast, D’Amico and Donnelly (2011) isolated several strains of S. aureus from raw milk intended for cheese manufacture that were capable of enterotoxin production. However, the type of enterotoxin produced (type C) is usually not associated with foodborne illness