昆明地区奶牛临床型乳房炎的病原与发生特点

Pathogenic organisms and Epidemical Features of Clinical Mastitis in Dairy Cows in Kunming

本文旨在探索昆明地区奶牛临床乳房炎的病原特点,为本病的防治提供科学依据。 1987～1990年期间,对昆明地区4个农场和个体户的93例临床型乳房炎的306份乳样进行了病原的分离与鉴定。从这些乳样共检出15个科,23个属的30种病原,共113株。其中包括主要病原81株,检出率为87.1％(81/93),混合感染病原32株,混合感染率为39.5％(32/81),培养阴性率为12.9％(12/93)。调查结果表明:该病在雨季发病率最高;年龄以3～6岁的牛发病率最高;在发病乳室中,以后乳室,尤其是右后乳室较为多见。

Mastitis is a common disease of dairy cows. It can cause Serious losses on economics and public health. This study is aimed to detect the pathogenic agents and epidemic features of the disease in dairy cows and provides a scientific control and treatment of the disease. In 1987～1990. 306 milk samples collected from 93 diseased cows on four farms and from private owneres, 113 isolates belonged to 15 families, 23 genera and 30 species of microbrganism were found. Among them 81 and 32 isolates strains were the main and mixed infective agents respectively. Positive isolation rates were 87.1% (81/93) ,mixe d infective rates were 39.5% (32/81), negative isolated rates were 12.9% (12/93). The result showed that the highest incidence of the disease occured in rainy season and is among 3-6 years old cows. It attacked the rear quarters more frequently, especidlly the right rear ones, than the front ones.