BEEF MEASLES. 



83 



In seven to eight months the cysts undergo degeneration, the liquid 

 is absorbed, and calcium salts are deposited throughout the mass. The 

 lesions ^Yhich remain have, in the ox, the appearance of interstitial 

 disseminated tuberculosis. 



There is no curative treatment. The infested animal recovers spon- 

 taneously with the lapse of time, for the cysticerci undergo degenerative 

 processes, but the flesh of such animals is of little commercial value. 



From a preventive standpoint we can only hope to improve matters by 

 a gradual and progressive change in social and public hygienic conditions. 



When the life of the nomad shall have been entirely replaced by 

 that of the highly-civilised European and private hygienic precautions 



Fig. 43. — Sexually mature segment of beef-measle tapeworm (tcenia 

 saginata). c.p., Cirrhus pouch with cirrhus ; d.c, dorsal canal; 

 (/.J)., genital pore; n., lateral longitudinal nerves; ov., ovary; 

 s^., shell-gland; ^., testicles ; z^^., median uterine stem, enlarged (in 

 part after Leuckart) ; v., vagina ; v.c, ventral canal, connected by 

 transverse canal ; tc, vd., vas deferens; vg., vitellogene gland. 



have rendered it impossible for animals to obtain access to segments or 

 eggs of the Tcenia saginata, beef measles will disappear. 



At present, in the countries where the disease is common, one 

 exj^eriences a feeling of astonishment that it is not far more frequent; 

 for experiment has shown that a person infected with one unarmed 

 tapeworm expels with the faeces an average of four hundred proglot- 

 tides per month, each proglottis or segment of the worm containing 

 about 30,000 eggs, each of which is capable of developing into a 

 tapeworm. 



G 2 



