PARASITES INFECTIONS OF GOLDFISH (Carassius auratus L.)

Izdvajanje riba iz prirodnoga staništa i držanje u akvarijima, u kojima je velik broj riba na malome prostoru, djeluje ne samo stresno nego i povećava mogućnost nastanka i razvoja bolesti. U takvim, neprirodnim uvjetima, ali često povoljnim za razmnožavanje nametnika, nametnici mogu uzrokovati bolesti koje u konačnici dovode do uginuća. U našem smo radu istražili prisutnost nametnika u zlatnih karasa (Carassius auratus L.) držanih u akvariju, a podrijetlom iz triju trgovina za kućne ljubimce. Provedenim je istraživanjem utvrđena prisutnost ovih nametnika: Trypanoplasma sp., Trichodina sp., Ichthyophthirius multifiliis, Myxobolus sp., Dactylogyrus sp. i Gyrodactylus sp. S obzirom na utvrđeni broj nametnika u pregledanih riba, može se zaključiti da nametnici mogu biti jedan od uzroka ugibanja zlatnih karasa. Zbog toga posebnu pažnju treba posvetiti karanteni pri uvozu posebno egzotičnih akvarijskih riba kojima se mogu unijeti i egzotični uzročnici nametničkih bolesti, kao i stalnoj zdravstvenoj kontroli, a, u slučaju pojave bolesti, pravodobnom i odgovarajućem liječenju.Removing fish from their natural environment, and placing them in aquariums, where large number is concentrated on small space, causes not only stress but increases the possibility of disease. In these unnatural conditions but often adequate for parasite reproduction, parasites can cause diseases leading to death. In our work we investigated parasites presence in goldfish (Carassius auratus L.) kept in aquarium, from three different pet shops. The study showed presence of: Trypanoplasma sp., Trichodina sp., Ichthyophthirius multifiliis, Myxoboulus sp., Dactylogyrus sp. and Gyrodactylus sp. Considering the number of parasites found in examined fish, it can be possible that parasites can cause mortality in goldfish. Therefore, special caution has to be on quarantine and healthcare while importing especially exotic aquarium fish that may be infected with exotic parasites. In case of disease, proper treatment in due time has to be conducted

Melanoides tuberculata (Mollusca: Thiaridae) as an intermediate host of Centrocestus formosanus (Trematoda: Heterophyidae) in Brazil Melanoides tuberculata (Mollusca: Thiaridae) como hospedeiro intermediário de Centrocestus formosanus (Trematoda: Heterophyidae) no Brasil

Pleurolophocercous cercariae emerged from naturally infected Melanoides tuberculata from Minas Gerais State, Brazil, were used to perform experimental infection of laboratory-reared Poecilia reticulata. Mature metacercariae were obtained from the gills of fishes and force-fed to Mus musculus. The adult parasites which recovered from small intestines of mice were identified as Centrocestus formosanus. This is the first report of M. tuberculata as intermediate host of this heterophyid in Brazil.<br>Cercárias do tipo pleurolofocerca emergidas de Melanoides tuberculata naturalmente infectados coletados na represa da Pampulha, Belo Horizonte, Minas Gerais, Brasil, foram utilizadas para a infecção experimental de Poecilia reticulata criados em laboratório. Metacercárias maduras foram obtidas nas brânquias dos peixes e administradas por via oral a Mus musculus. Parasitos adultos recuperados no intestino delgado dos camundongos foram identificados como Centrocestus formosanus. Este é o primeiro relato de M. tuberculata como hospedeiro intermediário deste parasito no Brasil