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Gastrodiscoides hominis (Lewis and McConnell, 1876) Leiper, 1913

Distribution

Malaysia, India (Assam, Bihar and Orissa), Pakistan, Philippines, Myanmar, Thailand, Vietnam, Guyana and CIS. In Kamrup district, Assam, 41% of the population is infected; in Burma 5%. Natural hosts include pigs, the mouse deer, rhesus monkeys and apes.

Characteristics

The fluke is reddish from haemoglobin pigment. When alive, it is very expansile and can elongate to 1 cm. Preserved specimens measure 5–7 3–4 mm at the widest point. The anterior end is conical, and the posterior discoidal, flattened ventrally to form a concave disc. Prominent genital papillae are seen and the common genital pore is 2.5 mm from the oral sucker. The ventral sucker (acetabulum) is ventrally situated in the caudal portion and measures 2 mm in diameter. The tegument is smooth. The alimentary canal consists of a pharynx with two pear-shaped pharyngeal pouches. The oesophagus is 1 mm in length and ends in a muscular bulb, where the …