江苏某猪场仔猪腹泻的临床调查与病因分析

Clinical investigation and etiological analysis of piglets diarrhea at a pig breeding farm in Jiangsu Province

调查江苏某集约化管理的大型种猪场的仔猪腹泻情况及分析病因,为有效防控仔猪腹泻提供参考。通过对该场腹泻仔猪的临床症状、病理变化进行观察、记录,对采集的发病仔猪病料进行细菌学和病毒学检查以及细菌的药敏试验,并统计、分析仔猪腹泻发病的主要原因。结果发现在临床上观察到仔猪发生严重的呕吐、腹泻和脱水症状,病理变化主要出现在胃肠道。腹泻主要发生于3~19日龄的仔猪,症状随着日龄增大而逐渐减轻。病原体为大肠杆菌的病例占70.0%、猪流行性腹泻病毒(PEDV)占42.5%、猪传染性胃肠炎病毒(TGEV)占15.0%、A群轮状病毒(GARV)占2.5%。本场的腹泻以大肠杆菌和流行性腹泻病毒感染为主,也存在一定的传染性胃肠炎病毒和轮状病毒病的混合感染,故发生仔猪腹泻病时做多种病原检测很有必要。

In order to investigate the causing agents of piglets diarrhea at a large-scale pig breeding farm in Jiangsu, the clinical symptoms and necropsy of some diarrhea piglets were observed and recorded and some clinical samples were taken for laboratory diagnosis. And then the statistical methods were used to analyze the main cause of diarrhea piglets. Serious vomiting, diarrhea and dehydration of piglets were ob- served clinically, and the pathological changes mainly occurred in the gastrointestinal tract. Diarrhea occurred mainly in the 3- to 19-day- old piglets and the symptoms were gradually alleviated with age. The laboratory tests showed the positive rates of Escherichia coli, porcine epi- demic diarrhea virus （ PEDV）, porcine transmissible gastroenteritis virus （TGEV） and group A porcine rotavirus （GARV） were 70%, 42. 5%, 15. 0% and 2. 5%, respectively in the diseased piglets. The main pathogens were determined to be E. coli and PEDV. Additionally, the mixed infection of TGEV and GARV could frequently be found. So it is necessary to perform the etiological detection when diarrhea occurs.