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Prevalence of resistance to selected antimicrobial agents among Escherichia coli isolates obtained from broiler and layer chickens in Arusha and Mwanza by district (%). ETP = ertapenem, C = chloramphenicol, CRO = ceftriaxone, CIP = ciprofloxacin, AMP = ampicillin, STX = trimethoprim/sulfamethoxazole, CN = gentamicin.
