EN
Intermediate hosts of Protostrongylus rufescens and Muellerius capillaris were examined in province and laboratory conditions; pasture infection with larvae of P. rufescens was found in snails from Helicella obvia. In laboratory conditions, a full larval development of both Nemathelminthes could be obtained only in snails from Succinea putris, Helicella obvia and Cepaea vindobonensis.