Prevalence and Risk Factors of Sub-clinical Mastitis in Lactating Dairy Cows with Special Emphasis on Antibiogram of the Causative Bacteria in Bangladesh

Background: Mastitis is one of the most devastating conditions for dairy farms because its alarming impact on production. Khulna intensive regions Bangladesh but comprehensive epidemiological studies regarding prevalence and risk factors sub-clinical mastitis with antibiogram causative bacteria are scant. Therefore, an study was conducted in district to investigate factor lactating cows bacteria. Methods: Five were selected a total 400 quarter milk samples 100 subjected California Test detect mastitis. Antibiogram performed determine sensitivity resistant pattern isolated Results: An overall cow level recorded as 28%. Risk like type breed, body condition score, yield, grass feeding, udder washing before milking, drying after washing, production system, dry therapy, stimuli milking techniques statistically significant occurrence revealed that 33.03% E. coli 16.96% Staphylococcus sp. sensitive amoxicillin, gentamicin trimethoprim/sulphamethoxazole.