trematode centrocestus formosanus infection and distribution in ornamental fishes in mexico.the aim of this study was to determine the ornamental fish species affected by the metacercariae of the digenean trematode centrocestus formosanus and its distribution in 48 fish farms in morelos, central mexico. the parasite was found to form various numbers of branchial cysts in 11 of the 25 species analyzed. goldfish carassius auratus was the most commonly affected species; 20 of 30 farms were positive for this parasite, the fish showing severe clinical signs and having a high mortality rate. ...200919485122
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