A total of 334 Staphylococcus aureus isolates (219 beef isolates (143 beef livers and 76 other beef cuts) and 115 pork isolates) were screened for 18 different toxin genes that belong to six different toxin gene groups (Table 3). As shown in Table 3, S. aureus hemolysin genes were found at a higher percentage in beef and pork than other groups of toxin genes. Also, no isolates of beef and pork harbored enterotoxin genes seb-sec or see, the exfloliative toxin genes eta or etb, or the Leucocidin gene lukM. Also, the prevalence of hemolysin genes hla (93.2%) and hld (93.2%) in beef isolates were higher than in the pork ones, where hla was 86.9% and hld was 86.9%. Hemolysin gene hlb was present more often in beef than in pork.