[Pathohistological picture of the neural form of listeriosis in sheep].

Gross and histopathologic investigations were carried out on the viscera, the brain, and the spinal cord of sheep spontaneously infected with listeriosis. It was found that with the protracted course of the disease the gross lesions were found in the various sections of the spinal cord too. Besides, with the chronic course of the nervous form of listeriosis in sheep the morphologic lesions consist of purulent necrotic meningoencephalitis and of myelitis. Histopathologically, myelitis is manifested by lymphohistiocytic infiltrations around the vessels and diffuse or focal infiltration of neutrophile leukocytes.