Serotype and antibiotic susceptibility about Mannheimia haemolytica isolated from Yamaguchi Prefecture
2019
Sano, H. (Yamaguchi Prefectural Chubu Livestock Hygiene Service Center, Yamaguchi, Yamaguchi (Japan))
In this report, 16 strains of Mannheimia haemolytica (Mh) was examined serotyping with immunized rabbit serum and antibiotics susceptibility test with disk method. Researched 16 strains of Mh is almost isolated from cattle in Yamaguchi prefecture from 2005 to 2018, developed pneumonia or respiratory sign. But only one strain is isolated from peritonitis case. The number of serotype 1 is 4, serotype 2 is 5, serotype 6 is 6, and serotype 11 is 1.The Mh is almost isolated from calf but some strains are isolated from fatting or adult cattle. In antibiotics susceptibility test, No strains of serotype 1, 2 of 11 showed resistance three or more antibiotics ;however, among six strains of serotype 6, three showed resistance 3 or more antibiotics. That said there is a tendency that serotype 6 Mh isolated from Yamaguchi prefecture gets multi drug resistance.
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