CHAPTER LXXV 



HELMINTH INFECTIONS 



General remarks — The intestinal trematodiases — The intestinal cestodiases — 

 The intestinal nematodiases — -Trichuriasis — Ankylostomiasis — Ascariasis 

 —Oxyuriasis — -Intestinal polyparasitism — Rare infections — References. 



General Remarks. 



In the present chapter we propose to consider the helminth 

 infections of the intestines, and in so doing exclude those found in 

 the liver or the bloodvessels of the intestines, though it is true that 

 the eggs in both cases may be found in the faeces. 



The Intestinal Trematodiases. 



Definition. — An intestinal trematodiasis is an infection of the 

 alimentary canal with adult trematode worms. 



Remarks. — The intestinal trematode worms of man are: — 



1. Watsonius watsoni (Conyngham, 1904). 



2. Gastrodisctis hominis (Lewis and McConnell, 1876). 



3. Fasciolopsis fiilleborni Rodenwalt, 1909. 

 f Fasciolopsis rathouisi Poirier, 1887. 



^' \ Fasciolopsis buski Lankester, 1857. 



5. Heterophyes heterophyes (von Siebold, 1852). 



6. Metagonimiis yokogawai (Katsurada, 1913). 



7. Echinostoma ilocanum Garrison, 1908. 



g ,-^.( Echinostoma (Euparyphium) Malay anum helper , 1911. 

 ' ^' ' yArtyfechinostomum sufrartyfex Clayton Lane, 1915. 



Euryirema pancreaticum (Janson), fully described by Loos {Annals of Trcp. 

 Medicine, 1907, vol. i., p. 128), has occasionally been found in man in China. 



In addition to adult worms, the ova of the Schistosomidse (Chapters 

 XXIV., LXIV., LXXVIL, and LXXXIII.) and those of the liver 

 flukes (Chapter LXXXI.) pass down the alimentary canal and 

 escape in the fseces. 



Fasciola hepatica is the cause of halzoun, described in Chapter 

 LXXIV., p. 1746. 



Symptomatology. — Diarrhoea has been described as being caused 

 by Watsonius watsbni (p. 562), while Fasciolopsis buski (p. 568) 

 causes dysenteric diarrhoea, F. rathouisi (p. 568) colic, F. fiilleborni 

 (p. 569) fever, and Kwan's fluke (p. 569) gastric disturbance, but 



1752 



