The peculiarities of pathomorphogenesis of lymphoid leukemia in chickens

Pathomorphological picture of changes in organs and tissues in chickens, with lymphoid leukemia was studied, characteristic pathognomonic macro- and microscopic changes for underlying the disease were established and differential diagnosis of the disease with similar morphological signs - Marek’s disease was performed. The objects of the study were roosters and laying hens kept in one of the farms of Krasnoyarsk Territory, during 2019 an autopsy was performed on 11 birds’ corpses. The material was taken for histological examination - tissue fragments of the bursa, spleen, liver, kidneys, heart, small and large intestines, lungs, ovary, oviduct, testes, sections were made on “Tekhnom MZP-01” microtome, stained with Ehrlich hematoxylin and eosin. To conduct serological studies of hens’ blood serum for the occurrence of antibodies to ALV-A, blood samples were taken from the hens with clinical signs of the disease - 10 birds, specific antibodies were detected in all the cases in enzyme-linked immunosorbent assay (ELISA)...