Treponemal infections in wild European brown hares (Lepus europaeus) f
rom The Netherlands were diagnosed by means of serological tests for h
uman syphilis and histological demonstration of spirochetes by the Bos
ma-Steiner silver impregnation method in histological sections of skin
lesions. The treponeme should probably be classified as ''Treponema p
araluisleporis.''