“…Although less associated with mortality than other groups of parasites, intestinal trematodes are responsible for significant morbidity, food safety and quality problems (Toledo et al 2006;Yu and Mott 1994), but they have not attracted the interest of international agencies until recently. The intestinal trematodes transmitted by fish belong to the Echinostomatidae, Heterophyidae, and Nanophyetidae but there are several other intestinal or liver trematodes within Diplostomidae, Fasciolidae, Gastrodiscidae, Gymnophallidae, Lecithodendriidae, Microphallidae, Paramphistomatidae, Plagiorchiidae and Strigeidae (Chai 2007;Chai et al 2005a;Dawer 1956;Kumar 1999;Mas-Coma and Bargues 1997;Yamaguti 1971;Yu and Mott 1994). All of these species are acquired by humans from ingestion of raw or undercooked fish, mollusks, amphibians, terrestrial snakes, aquatic insects and aquatic plants (Chai et al 2009;Yu and Mott 1994).…”