Comparative susceptibility of two turkey strains to lymphoproliferative disease virus

The susceptibility to lymphoproliferative disease (LPD) of 1-day-old and 3-week-old poults of two turkey strains (A and B) was examined. Their susceptibility to infection with the causative virus was evaluated by the level and the duration of viraemia and by the presence of gross and microscopic lymphoproliferative lesions. Although in field conditions the incidence of outbreaks of LPD in strain A turkeys was much higher than in strain B, both lines were found to be of similar susceptibility to infection under experimental conditions.