The Histological Changes in Lungs on Chickens Vaccinated against Avian Infectious Bronchitis with Strains Ma5+Clon30 and H-120 N

Abstract

This paper presents a review of the histological modifications in lung on vaccinated chickens with “H-120” and “Ma5+Clon30” strains, administered by spray method. Were established that “H-120” vaccine strains against avian infectious bronchitis make the minor changes in lung tissue, which is observed at 10, 20 and 30 days after vaccination and expressed with lymphoblast and plasma cells, in some regions capillary congestion is observed and return to normal structure after 40 days after vaccination. After the vaccination with “Ma5+Clon30” vaccine strain in bronchial sub mucosa was isolated a diffuse infiltrations of lymphocytes and lymphoid clusters.