PATHOMORPHOLOGICAL CHANGES IN THE HEMOPOIETIC COMPONENTS OF THE SKELETON OF PIGS AT DIFFERENT STAGES OF THE DEVELOPMENT OF CLINICALLY EXPRESSED CIRCOVIRUS INFECTION TYPE II

Abstract

The author, on the basis of pathohistological studies, determined the pathological changes in
the hematopoietic components of the skeleton of piglets at different stages of the development of
clinically expressed PCV2-infection. It was established that pathological changes in the cellular
composition of the bone marrow in piglets at different stages of PCV2-infection development are
mainly have a compensatory and degenerative in nature, without marked inflammatory changes
and are manifested by the gradual depletion of the parenchyma with a decrease in the number of all
hemopoietic cells against the background of pathological proliferation of stromal cells with the
formation of cystic structures.
Key words: PCV2 infection stages, tissue and cellular hematopoietic components, bone
marrow