Pathomorphology of chickens organs with respiratory, nefroso-nephritis and reproductive form of infectious bronchitis

Abstract

The article presents the data of pathomorphology of chicken organs for infectious bronchitis. The authors found that the lesions of the organs for infectious bronchitis of chickens are systemic in nature and manifests itself depending on the age of the bird and the form of the disease: in the respiratory form, the lungs are most affected in chickens of 20-day age; in the nephroso-nephritis formkidneys at 40, 90-day age; in the reproductive formovaries and ovaries at 285-day age. In this case, the respiratory form of infectious bronchitis in the lungs of chickens was observed hyperemia and edema of stroma, in pnevmocapillar and around the vessel contains a transudate. A significant number of pneumocapillars filled desquamated epithelium and lymphocytes. Some parts of the lung tissue and the tissue around the vessels are impregnated with transudate. In the lumen of parabronchus the presence of desquamated epithelium, lymphocytes, and muco-serous exudate noted. There were large areas of atelectasis, which bordered on areas of compensatory emphysema. The disease was accompanied by catarrhalhemorrhagic, croup inflammation of the bronchus. In many cases, hyperemia and hemorrhages on the mucous membrane of the trachea, often catarrhal bronchitis, were observed. For nephroso-nephritis forms of infectious bronchitis in the kidneys of chickens for infectious bronchitis, hyperemia and hemorrhages in the stroma, granular dystrophy, necrosis and desquamation of tubular epithelial cells were recorded, in the lumen of which the accumulation of protein mass was detected, as well as blood filling of the capillary plexus of the vascular glomerulus. According to the reproductive form of infectious bronchitis in the oviduct, the presence of cysts was noted, especially in the anterior part of it. The posterior part of the oviduct was predominantly atrophied. The ovary was significantly reduced and covered with yellow bodies. In the future, atresia and degenerative changes in the egg follicles occurred.

Immune response of the harderian gland in chickens to infectious bronchitis coronavirus

“…Avian infectious bronchitis virus (RNA-genome virus from Coronaviridae family, Coronavirus genus) affects the organs of breathing, excretion, and reproduc-tion (Jackwood M, 2012). Therefore, the respiratory, nephroso-nephrite and reproductive forms of this disease are distinguished (Sarah E et al, 2014, Bru T et al, 2017, Guralska S et al, 2019, Karimi V et al, 2019. The intestinal form is also detected (Dhinakar Raj G, Jones RC, 1997, Balestrin E et al, 2014.…”

“…This study is a continuation of a cycle of investigations, dedicated to the pathomorphology and preventive vaccination of avian infectious bronchitis. For instance, previously we have conducted the studies on the impact of AIB virus on the organs of hemopoiesis and immunogenesis (Guralska S, 2017), pathomorphological changes in parenchymatous organs of chickens under different forms of disease manifestation (Guralska S et al, 2019); the impact of vaccination on the morphology and immunohistochemistry of the harderian gland in chickens and the application of the immunomodulator under vaccination on the morphology of the harderian gland .…”