The efficacy trial of Enterisol(R) Ileitis by drinking water in a commercial swine farm

摘要

Porcine proliferative enteropathy(PPE), often called ileitis, is a common disease affecting the intestine of pigs. It is caused by bacterium Lawsonia intracellularis and transmitted through oral-faecal contact, and the farms suffer economic losses to the infection. Enterisol(R) Ileitis is a bacterium attenuated live oral vaccine developed by Boehringer-Ingelheim animal health, it has being sold in 19 European countries, North America, Australia and Philippines, and it provides an innovative health management method for the farm managers and veterinarians. The purpose of this study was to evaluate the efficacy of vaccination of Enterisol(R) Ileitis by drinking water method on the ileitis prevention and control and its economic benefits. Before the start of the trial, it was confirmed by veterinary experts through clinical observation, post-mortem necropsy and serological examination that clinical and sub-clinical ileitis affecting this farm. Six batches of a total of 4680 pigs were allocated into three experiment groups (with a start number of 890, 690, 802 pigs, respectively ) and three control groups(start with number of 787, 743, 768 pigs).The experiment groups were vaccinated with Enterisol(R) Ileitis at 3 weeks, 7 weeks and 9 weeks, respectively. The same management programs were adopted to both the experiment groups and the control. The bloody diarrhea feces,black soft feces, culling rate, mortality, ADG of growing pigs, average fattening days and FCR and pass rate for export of the experiment groups and the control were recorded, computed and compared. Results showed that the rate of pigs showing bloody diarrhea feces of the experiment and control were 0.37%,0.44%,0.07% reduction was observed. Other parameters like occurrence rate of black soft feces (6.76% experiment VS 15.26% control) , culling rate (3.08% VS 8.59%) , mortality (0.4% VS 1.79%) , ADG of growing pigs (733.8g VS 639.3g) , average fattening days ( 105 VS 114) and FCR (2.57 VS 2.74) and pass rate for export (96.54% VS 89.63%). All the results lead to the conclusion that using Enterisol(R) Ileitis can solve the problems of infection of ileitis, improve the farm performance and gain more economic benefits.