EN
The first two cases of adenoviral hemorrhagic enteritis in turkeys were described in Poland in 1987 and 1988. The first incidence was observed in turkeys aged 12 weeks, the second one in turkeys aged 16 weeks. The mortality rate among younger turkeys was 2%. In 16 week old turkeys pathogenic E. coli were also noted and the mortality rate was 2,2—3,4% daily. In both cases the virus was isolated from the duodenum and spleen after 5 subsequent passages in 6 week old sensitive turkeys. The presence of virus in the spleen was confirmed serologicaly by means of the agar gel immunodiffusion test.