For active immunisation of chickens and turkeys in order to reduce mortality and lesions (pericarditis, perihepatitis, airsacculitis) associated with Escherichia coli serotype O78.
Onset of immunity:
Chickens: 2 weeks after vaccination for the reduction of lesions. The onset of immunity has not been established for the mortality claim.
Turkeys: 3 weeks after second vaccination for the reduction of lesions and mortality.
Duration of immunity:
Chickens: 8 weeks for the reduction of lesions and 12 weeks for the reduction of mortality (spray). 12 weeks for the reduction of lesions and mortality (drinking water).
Turkeys: duration of immunity has not been established.
A cross protection study showed reduction of incidence and severity of airsacculitis caused by E. coli serotypes O1, O2 and O18 for spray application for chickens. For these serotypes no onset of immunity or duration of immunity was established.