Name of antimicrobial agent Level Number of Salmonella isolated and percent of their susceptibility for different antimicrobial agents BS(1) CS(1) FF(1) HS(2) HM(1) KS(1) LN(3) TM(1) TS(1) Ampicillin S 0 100 0 0 0 0 0 0 0 I 100 0 100 0 0 0 66.7 0 0 R 0 0 0 100 100 100 33.3 100 100 Amoxicillin S 100 0 0 0 0 0 66.7 100 0 I 0 0 100 0 0 0 0 0 0 R 0 100 0 100 100 100 33.3 0 100 Streptomycin S 0 100 100 50 0 0 66.7 0 100 I 0 0 0 0 0 0 0 100 0 R 100 0 0 50 100 100 33.3 0 0 Kanamycin S 100 100 100 0 0 100 100 0 0 I 0 0 0 50 0 0 0 100 100 R 0 0 0 50 100 0 0 0 0 Nalidixic acid S 100 100 100 50 0 100 66.7 100 0 I 0 0 0 0 100 0 33.3 0 100 R 0 0 0 50 0 0 0 0 0 Ciprofloxacin S 100 100 100 100 100 100 100 100 100 I 0 0 0 0 0 0 0 0 0 R 0 0 0 0 0 0 0 0 0 Chloramphenicol S 100 100 100 50 100 0 66.7 100 100 I 0 0 0 0 0 0 33.3 0 0 R 0 0 0 50 0 100 0 0 0 Cefoxitin S 0 100 0 0 0 0 100 0 0 I 0 0 0 0 0 0 0 0 0 R 100 0 100 100 100 100 0 100 100 Gentamycin S 100 100 100 100 100 100 100 100 100 I 0 0 0 0 0 0 0 0 0 R 0 0 0 0 0 0 0 0 0 Sulfamethoxazole- Trimethoprim S 100 100 100 50 100 100 100 100 100 I 0 0 0 0 0 0 0 0 0 R 0 0 0 50 0 0 0 0 0 MDRa N 100 100 100 0 0 0 66.7 100 0 Y 0 0 0 100 100 100 33.3 0 100

Table 4: Antimicrobial resistance level of Salmonella isolated from different samples of dairy farms, abattoir and individuals working in the dairy farms and abattoir. BS: Bucket swab; CS: Carcass swab; FF: Faeces from farm; HS: Polled hand swab from abattoir; KS: Polled Knife swab; LN: Lymph node; TM: Tank milk; TS: Tank swab; HM: Polled hanging material; S: S Susceptible; I: Intermediate; R: Resistant; MDR: Multi-drug resistance; a: resistant to three or more of the tested antimicrobial agent.