2020年11月,某奶牛养殖场从外地引进一批奶牛,在隔离饲养期间发现奶牛出现体温升高、精神沉郁、食欲减退等临床症状。随着病情的延长,病牛出现腹痛、腹泻等症状,部分病牛结膜发绀,且在发病后24 h左右死亡。根据发病牛的临床症状和解剖后的病理变化,并通过实验室病原分离与诊断,确定此次疫情是由牛巴氏杆菌所引起的牛出血性败血症。本文主要对该次疫情的诊治过程进行介绍,以期为后续类似疫病的诊断与防控提供参考。

In November 2020,a dairy farm introduced a batch of dairy cows from other places.During the quarantine period,it was found that the dairy cows showed clinical symptoms such as elevated body temperature,depression,and loss of appetite.As the disease progressed,symptoms such as abdominal pain and diarrhea appeared Some sick cows died within about 24 hours after the onset,and the conjunctiva became cyanotic.Based on the clinical symptoms and pathological changes after anatomy of the affected cows,and through laboratory pathogen isolation and diagnosis,the author determined that the epidemic was caused by Pasteurella bovis.In order to provide reference for the subsequent diagnosis,prevention and control of similar epidemics,this article mainly introduces the diagnosis and treatment process of this epidemic.