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Ciência Rural

Print version ISSN 0103-8478On-line version ISSN 1678-4596


NASCIMENTO, Eduardo Melo et al. Megaesophagus in sheep and goats. Cienc. Rural [online]. 2016, vol.46, n.8, pp.1450-1455.  Epub May 10, 2016. ISSN 0103-8478.

Megaesophagus is a rare disease in ruminants characterized by regurgitation of rumen contents. In this paper it was described cases of megaesophagus in two sheep and two goats on a farm in the state of Paraíba, Northeastern Brazil. All animals showed regurgitation of rumen contents and weight loss, with a clinical course of several months. At necropsy all animals presented megaesophagus. Histological examination showed segmental muscle necrosis in the esophagus and skeletal muscles. Serum samples from one sheep and one goat were negative for the presence of blue tongue antibodies by ELISA, and whole blood and muscle samples from one goat were negative for this virus by RT PCR. Epidemiological data and pathology suggested that the disease could have been caused by some toxic plant, but known plants causing segmental muscle necrosis were not observed in the areas where the disease occurred.

Keywords : megaesophagus; regurgitation; muscle necrosis; ruminants.

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