Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 10. (Budapest, 1977)
were found in Europe (LÉGER and STANKOVITSH, 1921; LÉGER and BORY , 1932). Detailed data have also been reported on coccidia indigenous in fish populations of Siberian and FarEastern waters (SCHULMAN and ZAIKA, 1962; CHEN, 1956). In Canada the present writer and his coworkers (MOLNÁR and FERNANDO, 1974; MOLNÁR and HANEK, 1974) demonstrated a considerable number of fish coccidium species. In other parts of the world fish coccidia have been little studied, if at all; no data are available on their occurrence in Africa, South America and Australia. On studying the literature, one has the impression that the fish coccidium line has been pursued with success by only those few specialists or research teams which employed an adequate method of collection, but did not judge it as.worth of description, probably because of its simplicity. At the same time, failure of attempts at separation of oocysts may have led also recognized fish pathologists to the conclusion that no coccidian parasites occur in fish hosts in the region studied. In Canada, where no fish coccidia had previously been kown, 21 Eimeria species were found in fishes and 24 of the 29 host species studied were found infested by coccidia a few years ago, when the methods described in this paper were employed for aimed investigation (MOLNÁR and FERNANDO, 1974; MOLNÁR and HANEK, 1974). MOLNÁR, K.: A halcoccidiumok természetéről és gyűjtési módjáról A halélősködő eimeriák kevésbé tanulmányozott volta gyűjtésük és tárolásuk nehézségeivel magyarázható. Rendkívül vékony burkú és sérülékeny oocystáik az általánosan elterjedt szeparálási eljárások során károsodnak. Kimutatásukra'bélsár, bélnyálka, nyálkahártya-kaparék vagy szervelnyomatok natív vizsgálatán kívül a szövetekben lévő oocysták mesterséges emésztéssel (0,25- 0, 5%-os tripszin oldattal) való kiszabadítása ajánlható. A bélsárban, nyálkában vagy szövetben levő oocysták fedőlemez alatt 4%-os formaiinnal vaj*y 2, 5%-os glutáraldehiddel körülfolyatva és a fedőlemez kanadabalzsammal való szegélyezése után mikroszkópos vizsgálatra alkalmas állapotban hosszabb ideig tárolhatók. References CHEN CHIH-LEU, (1956): The protozoan parasites from four species of Chinese pond fishes. III. The Protozoan parasites of Arystichthys nobilis and Hypophthalmichthys mollitris.Acta Hydrobiol. Sinica, 279-299. LABBE, A. (1893): Sur les coccidies des oiseaux. - CR. Acad. Sei. (Paris), 116. 1300-1303. LÉGER, L. - BORY, T. (1932): Eimeria pigra n. sp. nouvelle coccidie juxtaepitheliale, parasite du Gardon rouge. - CR. Acad. Sei. (Paris), 148. 1710-1712. LÉGER, L. - STANKOVITSH, S. (1921): Sur la coccidiose des alevines de la carpe. - CR. Acad. Sei. (Paris), 173. 742-744. LOM, J. (1970): Protozoa causing diseases in marine fishes. - in: SNIESZKO, S.F.: A symposium on diseases of fishes and shellfishes. Washington, D. C. LOM, J. (1971): Remarks on the spore envelopes in fish Coccidia. - Folia Parasitologica (Praha), 18. 289-293. MOLNÁR, K. - FERNANDO, C.H. (1974): Some new Eimeria (Protozoa, Coccidia) from freshwater fishes in Ontario, Canada. - J. Canad. Zool., 52. 413-419. MOLNÁR,K. - HANEK, G. (1974): Seven new Eimeria spp. (Protozoa, Coccidia) from Freshwater Fishes of Canada. - J. Protozool. , 21. 489-493. MOLNÁR, K. - PELLÉRDY, L. (1970): Further studies on coccidia of freshwater fishes in Hungary. - Acta Vet. Acad. Sei. Hung., 20^ 45-55.
