328 ECONOMIC IMPORTANCE OF NEMATODES. 



Heteralds perspicilluni is found in the intestine of 

 fowls, turkeys and guinea-fowls; H . vesicularis in 

 poultry and game birds; H. coluvihae in pig-eons. 



Oxyurus cnrvula has been found in the intestine of 

 the horse, mule and donkey; 0. coin par in cats; 

 O. amhigua in rabbits. 



III. — Some Nematodes Paeasitic in Man. 



The Nematode parasite fauna of man is very large and 

 A^ry diverse in character, consisting- of members of nearly all 

 the genera of the group. Some of the examples recorded may 

 be regarded fts only " accidental " or occasional parasites, 

 but the large majority depend upon man for their normal 

 host, in whom they j)ass their larval development or adult 

 parasitic phase. 



The following list includes only some of the most import- 

 ant parasites, no attempt being made to exhaust the record of 

 human Nematode parasites : — 



ANGVILLVLIDAE. 



Rhahditis (Lepfodera) pellio, from the vagina ; 

 B. nieliyi has been found in skin papules in a child. 



AnyuiUuIa aceti, the " vinegar eel-worm," has 

 been recorded from the human bladder and from vomits. 

 A. pntrefacieufi has also been found in vomits. 



ANGIOSTOMIDAE. 



Strongyloides stercoialis. — The causal agent of a 

 type of diarrhoea first described from soldiers in Cochin 

 China. 



GNA THOSTOMIDAE. 



GnatJio stoma sianiense (P= G. spinigerum). — 

 Recorded from the skin of a Siamese, where it produces 

 nodules. 



FH YSA LOPTERIDA E. 



Physalopfoa inonlcns and /"*. caiicasia. — Parasitic 

 in stomach and small intestine. 



FILAIUIDAE. 



Filaria hancrofti. — Adults found in lymphatic 

 system. There is a microfilaria! stage, Mf. nocturno, 

 found in the blood. Causes elephantiasis, chyluria and 

 lymphang'itis in tropical countries, e.g., China. India, 

 West Indies and Queensland. Transmitted by mos- 

 quitoes. 



F. demarquayi. — Adiilt females found in the 

 mesentery, larvae in the blood. Distribution: West 

 Indies, British Guiana. 



F. taiii guchi .—Vixvixsiiic in the lymphatic glands. 

 Japan. 



