Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 27. (Budapest, 1994)

of 11 mg/kg body mass/day, on two consecutive days (Qureshi et al. 1994). In cattle, that dose is sufficient for a single treatment. In wapiti, which has a body size comparable to that of the European deer, the single, positively effective dose of triclabendazole has been set at 50-60 mg/kg body mass (Pybus et al. 1991). Taking into consideration the body mass ratios, this dose is not much lower than the 200 mg/kg body mass level reported to be toxic for sheep. Oxyclozanide and hexachlorophene have been tried out in white-tailed deer (Odocoileus virginianus) with good results (Foreyt and Todd 1973, Foreyt and Todd 1976c). Rafoxanide in most cases killed only the young flukes, while nitroxynil prevented egg production only during the time of medication. Dioxanide, diamphenetide and hexachloroethane proved to be ineffective. Albendazole, which is often used for treating different helminthoses in Hungary, was also found to be effective against the large American liver fluke both in whitetailed deer and in cattle (Foreyt and Drave 1978, Ronald et al. 1979). For satisfactory efficacy, this anthelmintic must be used at a dose of approx. 25-45 mg/kg body mass, i.e. at a dose much higher than that used for nematode control. The efficacy of closantel and clorsulon against this parasite has only been investigated in the domestic cattle and sheep. Closantel was completely effective against 8-week-old flukes at a dose of 20 mg/kg of body mass per os (Stromberg et al. 1984, Stromberg et al. 1985b). At the same time, clorsulon was effective at a dosages of 7 and 21 mg/kg of body mass in 65 and 100 %, respectively. However, it was less effective against 16-week-old flukes (Foreyt 1988). Initial eradication of the fluke could theoretically be accomplished by bagging of the entire game population in question. However, such an approach would be unfeasible not only on ethical and economic grounds, but also because the actual boundaries of infection are unknown and as that solution would not eliminate the risk of repeated introduction. Therefore, it seems to be highly probable that we will have to "coexist" with another exotic parasite, with all of its animal health implications, and to watch its gradual acclimatization in this new habitat. At any rate, from now on it will be advisable to perform faecal examination of cervids to be introduced to a new area or into a game preserve, even if we know that not even this in vivo testing method is absolutely reliable because of the incidental nature of egg shedding and the possible occurrence of young flukes not producing eggs. Majoros, G. és Sztojkov, V: A Fascioloides magna (Bassi, 1875) (Trematoda: Fasciolata) métely megjelenése Magyarországon A szerzők a nagy amerikai májmétely (Fascioloides magna) első magyarországi előfordulásáról számolnak be. A Szigetközben (Északnyugat-Magyarország) elejtett gímszarvastehén (Cervus elaphus) kórbonctani vizsgálata során a máj 10 csaknem teljesen kifejlett mételyt tartalmazott. A természetes élőhelyről gyűjtött 15 bélsár- (hullaték-) minta közül 11 tartalmazott F. magna petéket. A vadászok feltételezése szerint a szigetközi gímszarvasok mindegyike hordozza ezt a mételyt. A fertőzött szarvaspopuláció a Duna közelében él, ahol a métely köztigazdájaként szereplő törpe iszapcsiga (Lymnaea tnmcatida) nagy számban fordul elő. A szerzők a parazita magyarországi terjedésének veszélyeit és módjait tárgyalják.