EN
The aim of the works was to determine the pathomorphological picture of the liver, kidneys and heart of SPF chicken embryos inoculated at day 5th of incubation with sublethal doses (10⁵‧⁰—10¹‧⁵ EID₅₀) of CELO virus (FAV-1). Between 8—10 days after inoculation there were observed some lesions and sporadically basophilic inclusion bodies in the liver cells and epithelial cells of kidney tubules. The embryos remained alive to the hattching following infecion with 10⁰‧⁵ of CELO virus.