The data obtained could also be taken into account for a reliable risk analysis regarding the contamination of foods with an animal S. aureus biotype. Finally, although the role of the newly described SEs in SFP is still obscure, probably because commercially available diagnostic kits for their detection ar limited, further studies are needed in order to better understand the occurrence of these SEs in S. aureusisolates from foods and their relationship with the origin of the strain. A remarkable level of resistance to several antibiotics such as ampicillin, tetracycline, erythromycin and trimethoprim–sulfametoxazole was found in the enterotoxigenic S. aureus strains analyzed in this survey especially in the strains belonging to the Human biotype (Table 4).