Abstract
When chickens were given an attenuated cell-culture-adapted infectious bursal disease virus at 1 day of age, virus could be detected in cell culture inoculated with homogenates of bursa of Fabricius, spleen, thymus, liver, kidney and lung for up to 14 days postinfection (PI) in 1 experiment and 10 days PI in another. Virus was no longer detectable after levels of virus-neutralizing antibody became significant. The virus was not detected in tissues from birds given the virus at 3 wk of age.