Development and application of an aerosol challenge method for reproduction of avian colibacillosis.

摘要: We have developed a reliable aerosol challenge method for reproduction of avian colibacillosis. This involves intranasal administration infectious bronchitis virus (IBV) to 1-day-old birds followed by three administrations .E. coli at 3 4-day intervals. In four separate experiments there was no significant difference in virulence single isolate (E3) whereas other field isolates ranged from highly virulent avirulent. also observed that the dominant population isolated flock broiler breeders but same 2 weeks later The this sensitive all antimicrobial agents tested 2-week-old multiresistant. A previous study has shown it is likely changed resistance pattern linked agents.