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Investigation on Mastitis Pathogens of Diary Cattle in Xinjiang Corps

Liu Wenjin 1,Chen Chuangfu 1,Wang Yuanzhi 1,Wu Jie 2,Ren Xueyan 1 (1. College of Animal Science & Technology, Shihezi University, Shihezi 832003,China; 2.Shihezi Domestic Animal Hospital, Shihezi 832003,China;  
positive samples were collected after clinical investigations and reagent diagnosis among 712 dairy cattle selected from seven cattle farms in Xinjiang Corps. Positive detecting rate for subclinical mastitis is 36.3% averagely but detecting rate for clinical mastitis is 16.7%. In the positive samples, G + bacteria are still the main pathogen causing diary cattle mastitis. S. aureus , which detecting rate is 78.98%, has become the most important pathogen instead of streptococcus basically. In addition, salmonella and E. coli , two common environmental pathogens, decrease obvious, detecting rates are 21.1% and 9.24%, respectively. In contrast, P. aeruginosa and B. cereus increase evident, detecting rates are 5.41% and 11.15%, respectively. P. aeruginosa and Cryptococcus are causing an outbreak of clinical mastitis. Cryptococcus , in some degree, becomes another new pathogen causing pertinacious mastitis.
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