INTESTINAL FLUKES 



229 



nostoma normally parasitic in other animals occur occasionally 

 in man in the Malay countries. They are distinguished from 

 other flukes by the crown of spines around the mouth sucker. 

 One species, E. ilocanum, about one-fifth of an inch long, was 

 found endemic among some Filipinos in a prison in Manila. 

 The other, E. malayanum, about two-fifths of an inch long, oc- 

 casionally parasitizes man in the Malay countries. 



Gastrodiscoides hominis (Fig. 78) is a species which is character- 

 ized by the expansion of the posterior end of the body into a great 



FIG. 78. Gastrodicoides hominis. A, ventral view, showing disc-like expansion 

 and posterior position of ventral sucker; B and C, dorsal views; D, lateral view; 

 E, eggs. A-D, X 3; E, X 65. (After Lewis and McConnell.) 



concave disc. It is a small reddish brown parasite a little over 

 one-fourth of an inch in length, which inhabits the cecum and 

 large intestine of hogs, and occasionally of man, in India. A 

 closely allied species occurs in horses and 

 asses in many parts of Africa. Watsonius 

 watsoni (Fig. 79) is a related species, also 

 reddish brown in color, found in the small 

 intestine of West African negroes. A closely 

 related species, Paramphistomum cervi, is 

 found in the stomach of sheep and cattle in 

 Egypt and has a life history almost identical 

 with that of the sheep liver fluke. This or a 

 very similar species occurs in the stomach of 

 cattle in the United States. (gen. ap.) and large 



Several large flukes of the genus Fasdolopsis j^to<v!). xTboul 

 occur occasionally in man, especially F. buski 35. (After Shipley, 

 (Fig. 80), found in many East Asian countries. 

 This species reaches a length of over an inch 

 with a width of about half an inch, and has the ventral sucker 

 very close to the mouth. It normally inhabits the small intestine 

 of the hog but occasionally parasitizes man. Goddard found it 

 in 5.5 per cent of all dispensary patients at Shaohing, China, 

 during 17 months, and in 28 per cent of 304 cases admitted to the 



FIG. 79. Watsonius 





