Table 3: Commonly used antimicrobials in the farms and antimicrobial susceptibility of E. coli and staphylococci isolated from the poultry faecal samples.

Antimicrobial agent Frequency Percentage of Usage Percent Resistance
E. coli Staphylococci
Penicillin 18 30.0 90 80
Amoxicillin 9 15.0 100 100
Ampicillin NU NU 90 100
Cloxacillin NU NU 80 90
Augmentin NU NU 90 80
Tetracycline 20 33.3 90 10
Oxytetracycline 29 48.3 NT NT
Doxycycline 17 28.3 NT NT
Streptomycine 10 16.7 70 50
Gentamicin 3 5.0 50 30
Erythromycin 17 28.3 80 NT
Neomycin 40 66.7 NT NT
Chloramphenicol 27 45.0 90 70
Cotrimoxazole 43 71.7 90 NT
Metronidazole 7 11.7 NT NT
Nalidixic Acid NU NU 100 NT

NU: Not Used; NT: Not Tested.