To provide a theoretical basis for guiding the clinical rational use of antibiotics and improving the effect of antibiotics on the prevention and treatment of bovine mastitis. Streptococcus agalactiae were isolated and identifed from bovine mastitis of some pastures in fve provinces and cities in Heilongjiang, Shanghai, Hebei, Shandong and Inner Mongolia, meanwhile, the drug sensitivity was analyzed. A total of four hundred and ninety-seven milk samples were isolated and cultured, and eighteen strains of Streptococcus agalactiae were isolated by Gram stain, exposure to enzyme, CAMP and BD microbial identification system. The results showed that Streptococcus agalactiae isolated from Inner Mongolia was resistant to eleven kinds of antibacterials. Streptococcus agalactiae isolated from Heilongjiang Province was resistant to seven kinds of antibacterials.
China Dairy Cattle