Using the Kirby-Bauer disc diffusion method [23], E. Coli were tested for their susceptibility to 12 commonly used antimicrobials. On disks containing; Ampicillin (AMP 10 thermal g), Amoxycillin - clavulanic acid (AMC 30, thermal g), Tetracycline (TE 30 thermal g), sulfamethoxazole-trimethoprim. (SXT 30 thermal g), Ciprofloxacin (CIP 5 thermal g), Ceftriaxone (CRO 30 thermal g), Ceftazidime (CAZ 30 thermal g), Kanamycin (K 30 thermal g), Streptomycin. (S 10 thermal g), Gentamicin (CN 10 thermal g), Nalidixic acid (NA 30 thermal g) and Chloramphenicol (C 30 thermal g). The concentrations of the antimicrobial. Disks were selected based on the internationally recognized standards and guidelines on antimicrobial routine testing and. Reporting on Enterobacteriaceae provided by the Clinical and Laboratory Standard Institute. E. Coli strain 25922 was used. To control for bacterial growth and potency of antibiotic disks. Inoculated agar plates were incubated at 37 ° C for 24, H. The susceptibility zones were also measured and interpreted according to criteria set by the Clinical and Laboratory Standards. Institute.
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