Study on Outbreak of Transmissible Viral Proventriculis in Broiler Chickens

摘要

Transmissible viral proventriculitis (TVP) is an infectious diseaseevolving in broilers, was first reported in Holland, then in the U.S. and Australia. In intensiveaviculture this disease is associated with runting or stunting syndrome, causing significanteconomic harm.Goodwin et. al, in 1996 in USA identify through electron microscopy a virus whowas called by others researchers adenovirus-like. In this study was taken an outbreak ofbroiler chickens, 6120 in number, being made epidemiologic, clinic and anatomopathologicexamination. The frequent of TVP was followed by necropsy examination, made biweekly,and the results are shown in Table I.The clinic examination highlighted the uneven appearance of the chickens hasincreased from week III. Diseased chickens presented a cyclic polymorphism similar withmalabsorption syndrome.Macroscopic lesions were reported only in proventriculus. The organ and the isthmusare enlarged and friable, transition between the two organs are not well defined. Theproventriculus mucosa had pronounced lobular aspect because the glands are enlarged and onthe digital pressing is removed white-viscose content.