80 



DISEASES OF MUSCLES AND TENDONS, 



simply to oxen swallowing eggs or embryos of the unarmed tsenia, a 

 fact which explains the frequency of the disease in places where the 



Fig. 39. — Anatomy of the Cysticercus celluloscB (after Robin). A, Cyst; 

 B, scolex with hooks ; C, hooks ; D, magnified fragment of cyst. 



inhabitants are of nomad habits, and consequently disregard the most 

 elementary rules of public and general hygiene. 



Furthermore, cattle in the Sahara, in Senegal and in the Indies, 



have a very marked habit of eat- 

 ing ordure, and as no attempts are 

 made to prevent it, the risk to these 

 animals is greatly increased. 



As in the pig, the embryos 

 which reach the stomach and intes- 

 tine penetrate into the circulatory 

 system, and are thereby distributed 

 throughout the entire organism. 



The development of the cysti- 

 cercus is complete in forty days, 

 and if swallowed by man in infected 

 meat after this period it again gives 

 rise to the Tcenia saginata. 



The age of the animals seems of 



less importance than in the case 

 Fia. 40 -Section of a beef tongue heavily ^^ ^^^^ ■ ^^^, ^^^ ^^^^^ ^^^^.^^ 



mfestecl with beet measles, natural size -^ '=' ■ ■, n i • 



(Stiles, Annual Report U.S.A. Bureau l^'^ve seen cases ot beef measles ni 

 of Agriculture, 1901). animals of ten years old. 



