Clavijo M J, Murray D, Oliveira S, Rovira A
College of Veterinary Medicine, Iowa State University, USA.
New Fashion Pork, Jackson, USA.
Vet Rec. 2017 Jul 15;181(3):68. doi: 10.1136/vr.104064. Epub 2017 Apr 19.
Mycoplasma hyorhinis is one of the causative agents of polyserositis and arthritis in postweaning pigs. Knowledge regarding colonisation frequency and age distribution in modern pig production is lacking. The objective of this study was to estimate the prevalence of M hyorhinis colonisation in different age groups across three commercial pig populations. Nasal swabs were collected from sows, piglets and nursery pigs of different ages. Oral fluids were collected from nursery pigs. Necropsies were performed to assess the presence of M hyorhinis-associated disease. M hyorhinis was detected in 5/60 sows in herd A, 3/60 in herd B and none in herd C. In herd A and B, the prevalence was low in preweaning piglets (∼8 per cent) and high in postweaning pigs (∼98 per cent). A total of 7/8 oral fluids tested PCR positive in herds A and B, while 1/8 tested positive in herd C. In herd C, the preweaning and postweaning prevalence was low. In herds A and B, necropsied pigs had polyserositis lesions where M hyorhinis was detected by PCR. This study showed that prevalence of M hyorhinis colonisation varies with pig age and across farms. Information generated will aid in the design and implementation of control and prevention strategies.
猪鼻支原体是断奶后仔猪多发性浆膜炎和关节炎的病原体之一。目前缺乏关于现代养猪生产中其定植频率和年龄分布的相关知识。本研究的目的是估计三个商业猪群中不同年龄组猪鼻支原体的定植率。从不同年龄的母猪、仔猪和保育猪中采集鼻拭子。从保育猪中采集口腔液体。进行尸检以评估是否存在与猪鼻支原体相关的疾病。在A群中，60头母猪中有5头检测到猪鼻支原体，B群中60头中有3头，C群中未检测到。在A群和B群中，断奶前仔猪的定植率较低（约8%），断奶后猪的定植率较高（约98%）。在A群和B群中，共有7/8的口腔液体PCR检测呈阳性，而C群中8份中有1份呈阳性。在C群中，断奶前和断奶后的定植率较低。在A群和B群中，尸检猪有浆膜炎病变，通过PCR检测到猪鼻支原体。本研究表明，猪鼻支原体的定植率随猪的年龄和不同猪场而变化。所获得的信息将有助于控制和预防策略的设计与实施。
