Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 6. (Budapest, 1973)

Parasit. Hung. 6. 1973. Quantitative and Qualitative Analysis of Helminth Fauna of Microtus arvalis (Rodentia, Microtinae) in Europe Dr. Frantisek TENORA — Dr. Éva MURAI — Dr. Ferenc MÉSZÁROS Zoological Department of the University of Agriculture, Brno — Zoological Department of the Hungarian Natural History Museum, Budapest "Quantitative and Qualitative Analysis of Helminth Fauna of Microtus arvalis (Rodentia, Microtinae) in Europe" - Tenora, F., Murai, É., Mészáros, F. - Parasit. Hung. 6. 131-148. 1973. Results of a helminthological survey of 1026 Microtus arvalis collected from Czechoslovakia and Hungary are presented and compared to data of similar nature available from European countries. The geohelminth nematode species represent the majority of the common vole helminths. From the biohelminth species those are of more importance, whose intermediate hosts are mites living in the nest or on the body surface of the common vole. Dominant species: those of the genus Syphacia and Heligmosomum

. Influent species: Heligmosomoides polygyrus

, Trichocephalus muris and Aprostatandrya macrocephala

. The accessory species occur in those biotops, where the adequate host of the helminth lives together with Microtus arvalis. Introduction Ecological questions concerning the rodents and their helminth parasites have been dealt with from many aspects(see e.g. ELTON et col., 1931; KIRSENBLAT, 1938; ERHARD0VÁ, 1958; TEHORA, 1967b; WAHL, 1967; KISIELEWSKA, 1970, 1971). We have studied the structure of the helminth fauna of Microtus arvalis in order to obtain knowledge as a basis for further studies on the ecology of helminths. No data on this subject have been available in the literature. Material and Methods A great number of papers deal with the internal parasitic hel131