Pathologoanatomic Changes in Birds with Associated Infections (Infectious Bronchitis and Esherichiosis)

Abstract

Infectious diseases tend to be widespread in large poultry complexes containing a large number of birds in limited areas. It is an actual problem for industrial poultry farming. The presence of infectious diseases of viral and bacterial etiology in poultry farms has a negative effect not only on the exacerbation of the epizootic situation, but also it leads to a sharp decline of economic indicators. These infectious diseases are often associated and considered as a medical and environmental problem, due to the risk of spread among people. Experimental infection of chickens causes a slowdown in the growth and loss of cilia of epithelial cells, dilatation of tubular glands, infiltration of lymphocytes, mononuclear cells, plasma cells, as well as edema and fibroplasia of the proper layer of all parts of the oviduct. So, the clinical signs of IBC and its mixed course with escherichiosis, pathological changes and histological examination allow us to establish a preliminary diagnosis.