Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 6. (Budapest, 1973)
vector of TBE, was found to extend to more than 15 0 species of vertebrates . The mentioned species of mammalian öynusia are not only important as maintenance hosts but also as very frequent and main hosts of larvae of I. ricinus in Central European natural foci of TBE. Prom this point of view"Clethrionomys glareolus, Apodemus flavicollis and A. sylvaticus are of primary significance. Small insectivores as a rule play a minor role as hosts of I . r icinus larvae and are less important than small rodents (Pigs. 1 and 2). The population" density of reptiles, birds and insectivores seems to be much more constant than that of small rodents during the year and during the successive years; thus when only a few small rodents are available, birds together with insectivores become an important source of blood for I .ricinus larvae in natural foci of TBE of theriodic type . However, in the years when the population density of small mammals is normal, only a small percentage of the larvae feeds on birds, most of them parasitizing the mammals . Pig. 1 : Humber of engorged larvae of Ixodes ricinus on small rodents and insectivores. Calculation was made by the formula of Olsufjev (1953): Humber of engorged tick = Density of ho3t per 1 hectare/Index of infestation longevity. 1. ábra: Vért szívott Ixodes ricinus lárvák száma kis rágcsálókon és rovarevő gazdákon. A számítás Olsufjev (1953) alábbi formulája alapján történt: Vérszívott kullancsok száma = Gazdaállatok száma 1 hektár területen/A fertőzöttség tartamának indexe. Collection localities in Hungary - Magyarországi gyűjtőhelyek: P = Pertőboz; G = Gic; T = Tómalom; M = Mosonmagyaróvár; D = Debrecen. Time of collection - A gyűjtés ideje: IV = April; V = May; IX = September; X = October. Hosts - Gazdák: I = Insectivora; R = Rodentia; Mm = Mus musculus; Clg = Clethrionomys glareolus; Af = Apodemus flavicollis; As = Apodemus sylvaticus; Aa = Apodemus agrárius; Ma = Microtus arvalis; Ps = Pitymys subterraneus; Sm = Sorex minutus; Ta = Talpa europaea; Sa = Sorex araneus; CI = Crocidura leucodon; Cs = Crocidura suaveolens.
