3.3 Frequently used antimicrobials on beef cattle farms
Beef farmers recounted usage of a range of different antimicrobials on beef production. Most frequently and significantly (p<0.05) used antimicrobials in beef farms were: tetracyclines (97.8% by intensive farmers and 93.2% by semi-intensive farmers), sulfonamides (96.5% by intensive farmers and 89.7% by semi-intensive farmers), and penicillin (93.2% by intensive farmers and 93.2% by semi-intensive farmers). Other significantly used antimicrobials were gentamicin (85.1% by intensive farmers and 78.2% by semi-intensive farmers), and ciprofloxacin (75.0% by intensive farmers and 53.3% by semi-intensive farmers) (Table 2).