华东地区规模化猪场的回肠炎流行病学调查

华东地区规模化猪场的回肠炎流行病学调查曲向阳 1,2 姚火春 2* X 璇 1 黄涛 1 李喜焕 1（1. 美国礼来亚洲公司 XX 代表处，XX， 200020；2.XX 农业大学动物医学院，XXXX， 210095；）中图分类号：S855.1 文献标识码：C 文章编号：摘要：为调查回肠炎在华东地区三省一市规模化猪场的感染状态，我们利用商品化的胞内劳森氏菌快速检测试剂盒Lawsonia FirsttestTM对来自21个规模化猪场的321份粪便样品进行胞内劳森氏菌检测。结果表明，所检测的21个规模化猪场100％存在回肠炎感染。而且感染率随着猪只日龄增长而逐渐升高。4周龄仔猪即存在感染,感染率为9.1%，8周龄（41.5%）～10周龄(67.9%)为主要感染开始期，12周龄(94.3%)～14周龄(87.9%)为感染高峰期，所检测样品的总体阳性率为59.81%，强阳性率为31.2%，结果表明：华东地区规模化猪场普遍存在亚临床型回肠炎感染。此外，检测结果受药物保健方案影响较大。关键词：猪回肠炎；胞内劳森氏菌；流行病学调查；Lawsonia FIRSTtestTM；粪便；Epidemiological survey of Porcine Ileitison Intensive Swine Farms in East ChinaQU Xiangyang1,2 ,YAO Huochun2*, ZHANG Xuan1, HUANG Tao1,LI Xihuan1 (1. Elanco China,Shanghai 200020,China 2.Veterinary Medicine College of Nanjing Agricultural University,Nanjing,210095,China)Abstract：The epidemiological survey of porcine ileitis onintensive swine farms inEast China was carried out by using mercialized Lawsonia intracellularis test kit(Lawsonia FIRSTtestTM). A total of 321 fecal samples of pigs with different weeks-old were collected for detection of L.intracellularis. The results showed thatL.intracellularis infection was 100% on the 21 intensive swine farms. The positiverate of the pig infection was increased as the pigs growing. The earliest positive samples were detected from 4 week-old piglets with 9.1% positive. Onset of ileitis in pigs on most of the farms was between 8 weeks old with 41.5% positive to 10 weeks old with 67.9% positive. Pigs with the highest positive rat of ileitis were during 12 we...