[Listeria enzootic in newborn lambs].

Epizootological, clinical and pathomorphological studies were made of a meningo-encephalitic form of listeriotic enzooty in new born lambs. The clinical symptoms as well as the patho-anatomical and patho-histological changes in the brain and in the inner organs of dead lambs were described. Arisal of enzooty was connected with the inclusion of silage in the daily ration of ewes. It was assumed also that infection of suckling lambs possible by the milk of diseased mother-ewes also and in the prenatal period too. The meningo-encephalitic form of listeriotic enzooty established in new born lambs with symptoms of suppurative meningo-encephalitis was similar to that observed in sheep. L. monocytogenes was isolated from a suspension of various brain tissue parts of dead lambs.