The molecular epidemiology of four outbreaks of porcine pasteurellosis

Biochemical profiles, restriction endonuclease analysis (REA) and ribotyping were used to investigate a total of 38 Pasteurella multocida isolates from four separate outbreaks of pasteurellosis in Australian piggeries. Six isolates were obtained from Outbreak 1, 16 from Outbreak 2 and eight each from outbreaks 3 and 4. Outbreaks 1 and 2 were cases of pneumonic pasteurellosis while outbreaks 3 and 4 involved systemic pasteurellosis. Biochemical characterisation established that a number of different types of P. multocida were present in outbreaks 1 and 3 while outbreaks 2 and 4 were associated with a single type of P. multocida. Outbreaks 1 and 3 yielded isolates of P. multocida that belonged to the subspecies multocida and gallicida, with the subspecies multocida isolates being identified as biovar 3 (6 in total) or 12 (1 in total) and the subspecies gallicida isolates (7 in total) being identified as biovar 8. All 24 isolates from outbreaks 2 and 4 belonged to the subspecies multocida and were all biovar 3. REA and ribotyping showed that, in outbreaks 1 and 3, there were three different types of P. multocida in each outbreak with no common strains between the outbreaks. The molecular methods showed that only a single strain of P. multocida was associated with outbreaks 2 and 4, although the outbreaks were associated with strains that differed in REA profiles but shared a ribotype profile. This study has shown that both, systemic and pneumonic pasteurellosis can be associated with either a single strain or multiple strains of P. multocida. The results also indicate that the molecular typing methods of REA and ribotyping are superior to biochemical characterisation for epidemiological investigation of porcine pasteurellosis.     

Observations on avian pasteurellosis in Britain.

An investigation into the extent and significance of Pasteurella multocida infections of birds and poultry in Britain during a three year period (1974--1977) was undertaken. This was achieved by means of postal questionnaires, coupled with the biochemical and serological examination of bacterial isolates from 91 outbreaks in poultry and from nine cases in other avian species.     

牦牛巴氏杆菌病的调查与防治

1 基本情况 2005年8月2日至8月12日我县科才乡一牧场发生了牦牛急性传染病.该牧场位于科才乡西南端,海拔3500m以上,连日来阴雨连绵,空气潮湿寒冷,日平均气温5℃左右.2日一放牧员发现自家的3头牦牛突然死亡在圈场上.并有多头年龄不等的牦牛出现异常.主要表现为精神不振,呼吸困难,食欲废绝,严重者伸颈张口呼吸.     

绵羊巴氏杆菌病的调查及防治

20世纪80年代以来,红星四场发生绵羊巴氏杆菌病.由于发生数量较少,没有采取菌苗的防制,一般以治疗为主.90年代以后,该场羊总体数量很大,相对发病的数量也就多了.通过反复实践,摸索出了一些有效的防治措施,使该病的发生率、死亡率大大下降.但仍偶尔发生此病.该病有一典型剖检变化:肾发黑,当地都称"黑腰子病".现将绵羊的巴氏杆菌病的调查及防治情况报告如下.     

猪巴氏杆菌病的诊断与防治

某猪场所饲养的猪发生一场疾病,发病猪表现为精神沉郁、咳嗽、呼吸困难、体温升高、下痢（黄色）。根据临床症状、病理变化和实验室检查,确诊为由巴氏杆菌引起的猪肺疫。现将诊治过程报告如下。     

猪多杀性巴氏杆菌病预防与临床诊治

猪巴氏杆菌病是由多杀性巴氏杆菌引起的,又叫猪肺疫或俗称“锁喉风”。其主要临床表现为呼吸困难、发热、咽喉炎、肺炎和出血性败血症。该病的死亡率较高,给我国养猪业带来巨大经济损失。文章主要对猪巴氏杆菌的病原、流行特点、病理变化、临床症状、诊断以及防治进行剖析,进而给出科学的治疗方法,对防控猪巴氏杆菌病提供参考。     

犬巴氏杆菌病的预防与控制

巴氏杆菌病是由以多杀性巴氏杆菌为主的多种巴氏杆菌引起的一种细菌性传染病,哺乳动物和禽类均可感染发病,临床上犬的多杀性巴氏杆菌感染并不多见。2006年8月份,泰州市郊区某犬场犬群中发生一种以体温升高、食欲废绝、