Listeriosis in a dairy sheep herd in Rio Grande do Sul state, Brazil: case report

Clinical cases of listeriosis in two Lacaune rams, fed silage in a lot, are reported. Histological examination of nervous tissue revealed purulent meningoencephalitis, and L. monocytogenes was detected in nervous tissue by immunohistochemistry procedures. This disease should be suspected when oral lesions are visible in dairy sheep fed low quality silage.

sheep; Listeria monocytogenes; listeriosis; silage

Universidade Federal de Minas Gerais, Escola de Veterinária Caixa Postal 567, 30123-970 Belo Horizonte MG - Brazil, Tel.: (55 31) 3409-2041, Tel.: (55 31) 3409-2042 - Belo Horizonte - MG - Brazil