奶牛中型无绿藻性乳房炎

目前已有12个国家报道无绿藻性奶牛乳房炎,造成严重的经济损失并对公共安全存在潜在的危害.2010年春季,北京地区某奶牛场暴发中型无绿藻引起的临床型乳房炎.从患有临床型乳房炎的10头奶牛的11个乳区分离到8株酵母样微生物,鉴定为中型无绿藻.用16种抗生素药敏纸片进行药敏试验,结果显示中型无绿藻仅对庆大霉素、链霉素和阿米卡星等氨基糖苷类抗生素敏感.同化试验证明该分离株能发酵葡萄糖和丙三醇.本试验在我国首次报道了中型无绿藻能引起奶牛临床型乳房炎.     

Bovine mastitis caused by Prototheca zopfii: a case study

An outbreak of severe indurative mastitis in newly calved cows, from which Prototheca zopfii was isolated, is described. The refractory nature of this type of mastitis and the ineffectiveness of the presently available intramammary preparations are highlighted.     

Bovine mastitis therapy and why it fails

Treatment of bovine mastitis depends on the cause, the clinical manifestation and the antibiotic susceptibility of the agent. Mastitis therapy is commonly unsuccessful owing to pathological changes that occur in the udder parenchyma as a result of the inflammatory reaction to mastitogenic bacteria, pharmacokinetic properties of antimicrobial mastitis drugs, mastitogenic bacterial and related factors, and poor animal husbandry and veterinary interventions.