TRICHURIS 



677 



cated, with a terminal anus. Male with a spirally rolled posterior 

 end and one spicule; female with one ovary, and the vulva situated 

 at the junction of the thinner and thicker parts of the body. 

 Species in man : Trichuris trichiura 



Fig. 304. — Trichuris trichiura (LiNNiEUS, Fig. t,o 5. — Trichuris trichiura 

 1761): Male. (Linn/eus, 1761): Female. 



(B'rom a photograph by J. J. Bell.) 



Trichuris triehiura Linnaeus, 1761. 



Synonyms,— A scaris trichiura L., 1771; Trichocephalus hominis 

 Schrank, 1788; T. dispar Rudolphi, 1801. 



This worm is very commonly met with in the tropics. Its eggs 

 appear in the faeces, and it is met with in the cgecum and sometimes 



Figs. 306 and $<3y .-^Trichuris trichiura Linnaeus: Female and Male. 



(After Claus.) 



in the vetmiform appendix during post-mortems. Its anterior 

 end is frequently found buried in the mucous membrane, and while 

 in this position it is possible for bacteria to enter and cause disease 

 —e.g., appendicitis. 



