Dr. Murai Éva - Gubányi András szerk.: Parasitologia Hungarica 28. (Budapest, 1995)
fishermen from the Balaton Fisheries Co. Ltd. In some instances, we caught fish in the littoral zone with our own 20-metre trawl-net. In each case, the fish were transported to the laboratory alive, in aerated cans or nylon bags inflated with oxygen. When samples were taken in the summer, the water used for transportation was cooled with ice. After arrival at our institute, the fish were placed into concrete basins with flow-through water or in large plastics tanks with air insufflation, and were then dissected within the shortest time possible (within a few days). As far as possible, all inner organs (liver, kidney, heart, intestines, swimbladder, gallbladder), the gill filaments, the eyes, the fins and the skin were examined during dissection. The examinations included dissections under stereomicroscope, a light-microscopic protozoological examination, and a histological processing of the most interesting cases. The taxonomical classification of the demonstrated parasites was done on the basis of Lorn and Dykova's manual ( 1992) and, for the metazoans, the parasite identification handbook edited by Bauer (1985, 1987). RESULTS The taxonomical position and species composition of the parasites recorded during the dissections are shown in parasite-host list. Data on the occurrence of parasites by fish species and depending on the season are contained in Tables 1-7. Parasite-host relationships PROTOZOA Mastigophora Kinetoplastidea TRYPANOSOMATIDAE Trypanosoma danilewskyi Laveran et Mesnil, 1904 — Abramis brama Diplomonadea HEXAMITIDAE Spironucleus elegáns Lavier, 1936 — Carassius auratus gibelio Apicomplexa Coccidia EIMER1IDAE Eimeria anguillae Léger et Hollande, 1922 — Anguilla anguilla Eimeria rutili Dogiel et Bychovsky, 1938 -— Abramis brama Goussia acerinae (Pellérdy et Molnár, 1971) — Gymnocephalus cernuus Gauss ia carpelli (Léger et Stankovitch, 1921) — Cyprinus carpio, Carassius auratus gibelio Goussia pannonica Molnár, 1989 — Abramis brama Goussia leucisci (Schulman et Zaika, 1964) — Abramis brama, Carassius auratus gibelio Goussia stankovitchi (Stankovitch, 1920) — Abramis brama Goussia sinensis (Chen, 1956) — Hypophthalmychthis molitrix Goussia sp. /. — Stizostedion volgense Goussia sp. //. — Stizostedion volgense Goussia sp. III. — Neogobius fluviatilis
