Dr. Murai Éva szerk.: Parasitologia Hungarica 25. (Budapest, 1992)

valley with subalpine conditions in the Vel'ka Fatra Protected Area (VFPA) Lubochnianska dolina - (Murai et al. 1983). The last two samples are in the Western Carpathians, Slovakia. We have the possibility to compare faunisticdata and host-parasite relationships of the present sampling, Balaton shoreline region - Balaton Protected Area (BPA) - with the former ones. The aim of the present work was to study the parasitic helminths, recovered from mammals in the environs of Lake Balaton in connection with the research project involving mammalian communities in littoral territories of Lake Balaton and conducted at the Pannon University of Agricultural Sciences, Keszthely. MATERIAL AND METHODS Animals were collected by students of the University in the valley of the Csókakői stream arising from the Keszthely Mountains, in different habitats (bank of the stream, wood, grazing ground, reeds). Trap setting for micromammalians was done 20 occasions with 50-100 pitfall traps between October 1990 and February 1992, except the summer months. The collections generally lasted 4-6 days. As regards their species composition, the samples contained four species of shrews (Soricidae, 36 individuals), six species of mice (Muridae, 135 individuals) and three species of voles (Microtidae, 40 individuals). Predators, including 3 foxes (Vulpes vulpes), 1 badger (Mêles mêles), 1 beech-martin (Martes foina) and one deer (Capreolus capreolus) were badged by the rifle club. Muskrats (Ondatra zibethicus, 22 individuals) were purchased from professional collectors. In 1989, Sey investigated muskrats (17 individuals) in Keszthely Bay and recorded two trematode species (Sey 1990). These findings were also included in the faunistical and helminthological analysis. The dead animals were dissected in fresh condition. The helminths were fixed and preserved in 70 % ethyl alcohol. Whole mount preparations of trematodes and cestodes were stained with alum-carmine or iron-acetic-carmine. Nematodes were prepared for translucence in lactophenol. Rostellar hooks and eggs were observed in Berlese solution. Trematodes were identified by Sey, cestodes by Murai and Nematodes by Mészáros, using the above-mentioned literature as well as the papers of Vaucher and Hunkeler (1967), Vaucher (1971) and Genov (1984), respectively. RESULTS AND DISCUSSION Mammalian species examined from the valley of Csókakői stream in the period 1990 through 1992 (ratio of examined and infected specimens are in parenthesis) INSECTIVORA Sorex minutus Linnaeus, 1766 - (10/6); Sorex araneus Linnaeus, 1758 - (11/7); Neomys fodiens Pennant, 1771 - (3/2); Crocidura leucodon Hermann, 1780 - (12/6).