Mastitis is one of the costliest diseases affecting the livestock and incurs huge production losses and also involves high cost of treatment. Milk samples were obtained from the suspected mastitis animals from different parts of the Krishna district. Milk samples collected from different areas and sources were put to mastitis field surf test, white side test. Then the samples found positive were cultured on tryptose agar, MacConkey’s agar and blood agar. The cultures thus obtained were subjected to antibiotic sensitivity test (Disc diffusion method) using 10 commonly used antibiotics in the field to determine the antibiogram.
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