Concurrent experimental infection of E. coli and Newcastle disease virus in turkeys.
One thousand six hundred day old poults were randomly divided into four pens of 400 poults each . Twenty-five percent of the birds in pens 3 and 4 were inoculated orally, wih Eschericia coli (E. coli) 011 lab. Ten percent of the poults in pen 2 were inoculated, intratracheally with 109 EID50 of Newcastle disease virus (NDV), Al.315//12 and 10 percent of the poults in pen 3 (previously exposed to E. coli 011 lab) were also inoculated with NDV. A total of 19 E. coli 01 1 lab recoveries, was made out of 200 birds that were exposed to E. coli in pens 3 and 4. Sampling of the liver was superior to sampling of either the caecal junction or the yolk sac in E coli recoveries. Airsacculitis was first observed in birds dying at 3 weeks of age, but the severity of leisions was maximum at 7 to 10 weeks of age. High mortality and morbidity observed in th commercial farms in epizootics of concurrent infections of E. coli and NDV, were not observed in this study.
Key words: -Poults, Newcastle disease, Eschericia coli, airsacculitis.