Occurrences, treatment and antibiotic resistant pattern of colibacillosis and salmonellosis in broiler

Abstract

An experiment was conducted to investigate present occurrence of colibacillosis and salmonellosis in broiler and to find out the effective antibiotics for treatment of these diseases. The resistant pattern of Escherichia coli and Salmonella sp. against gentamicin, neomycin, oxytetracycline, amoxicillin, enrofloxacin and ciprofloxacin were also observed in Central Disease Investigation Laboratory (CDIL), Bangladesh. The occurrence of colibacillosis was 32.52% and salmonellosis was 13.17% but in mixed infection occurrence was 9.75% with colibacillosis and 2.92% with salmonellosis. Neomycin (38.00%) was mostly used for treatment of colibacillosis and enrofloxacin (25.93%) was used for treatment of salmonellosis. Efficacy of neomycin and enrofloxacin was 92.10% in colibacillosis and 85.81% in salmonellosis respectively. The study also revealed that Escherichia coli were resistant against neomycin (38.88%), oxytetracycline (50.55%), amoxicillin (60.68%), enrofloxacin (50.00%) and ciprofloxacin (30.55%). Salmonella sp. was resistant against neomycin (33.33%), oxytetracycline (63.33%), amoxicillin (63.33%), enrofloxacin (52.38%) and ciprofloxacin (52.38%) respectively. Gentamicin (100%) was highly sensitive for the treatment of colibacillosis and salmonellosis.