Isolates Antibiotic tested G (10) S  (100 ) R (5 ) K (30 ) A  (10 ) Se (100 ) P (100) T  (10 ) Cb (100) C (10) A-1 HR HR HR HR HR HR HR HR HR HR A-2 HR HR HR HR HR HR HR HR HR HR A-3 HR HR HR HR HR HR HR HR HR HR A-4 HR HR HR HR HR HR HR HR HR HR A-5 HR HR HR HR HR HR HR HR HR HR ACG-1 HR HR HR HR HR HR HR HR HR HR A-6 S HR R S S HR HR HR HR HR A-7 S R R R HR HR HR HR HR HR A-8 S R S S S HR HR R S R A-9 R HR R HR HR R HR S R HR A-10 S R S S S HR HR S S HR ASA-1 S R R S HR R HR R S R Symbols Radius of inhibition zone (mm) R 5-10mm HR <5mm S 11-20mm HS >20mm

Note: The figures in parentheses indicate units; G: Gentamicin; A: Ampicillin; T: Tetracycline; P: Polymyxin-B; C: Cloramphenicol; S: Streptomycin; K: Kanamycin; R: Rifampicin; Cb: Carbenicillin; Se: Spectinomycin

Table 7: Intrinsic antibiotic resistance profiles of isolates