EPIDEMIOLOGICAL, CLINICAL AND MORPHOPATOLOGICAL RESEARCHES IN AN OUTBREAK OF REOVIROSIS IN A BROILER FLOCK

Avian reovirosis is an infectious and contagious di-sease spread in intensive poultry, especially broilers, evolving with anatomoclinical multiple forms. In this paper are presented the results of epidemiological, cli-nical and morphopathological exams conducted in a broiler flock, in which the two syndromes of avian reo-virosis have occurred. The epidemiological investiga-tion has shown that reovirosis was present only at the respective generation of broilers, and that the disease was transmitted vertically. Specific symptoms of mal-absorption syndrome have occurred after 7 days, be -ing well expressed up to 3 weeks. It was observed an unevenness in broilers, suggesting the existence of broilers of different ages. Specific signs of the tenosy-novitis-arthritis syndrome appeared after 3 weeks of age. Histological lesions in proventriculus, small intes-tine, pancreas and liver, show an alteration of diges-tion, followed by a poor conversion of food, and infil-trative and hyperplasic lesions, show a local and gene-ral infectious process. A confirmation of reovirosis di-agnosis was done through RT-PCR.