ABSTRACT
Strigeidiasis is caused by intestinal flukes which belong to three families, the Strigeidae, the Diplostomatidae, and the Cyathocotylidae. The body of these flukes may be distinctly divided into two regions, or the division may be very slight or indistinct. Members of Strigeidae Railliet family are intestinal parasites of mammals and birds. The body of these flukes is usually divided by a transverse constriction into two regions, a forebody and a hindbody. The clinostomes are parasites of birds and mammals where they are found in the mouth and esophagus. They are, in general, large- or medium-size flukes. Cercariae of these flukes are brevifurcate and pharyngeate; the oral sucker is replaced by an extensible penetration organ, similar to the one which is present in the schistosome cercariae. The cercariae develop in rediae; the clinostomes have a three-host life cycle. The body of flukes belonging to the genus Clinostomum Leidy, 1856 is spined, stout, linguiform, convex dorsally, and concave ventrally.
