Epidemiological investigation on amphistomiasis through examination of viscera and faeces of 267 cattle, 120 goats, 67 sheep and 36 buffaloes in some parts of flood plains, hilly and coastal areas of Bangladesh during July, 1998 to June, 2001 revealed all types of animals infected with at least three or more species of amphistomes in all seasons of the year. The amphistome species were Gastrothylax crumemfer, Paramphistomum cervi, Cotylophoron cotylophorum; GiOntocotyle explanatum and Hom—alogaster ploniae. Simultaneous examination of 10,404 freshwater snails revealed 9 species of which at least five species namely Indoplanorbis exustus, Lymnaea spp. Thiara tubrculata, Bithynia tentaculata and Gyraulus convexiusculus were detected as the possible intermediate host of amphistome flukes. The vector snails were prevalent rouhd the year in almost all areas of the country except the extreme sea shores. There was a significant (p4 years) than in young (<2 years)
