woEMS. 237 



abundant they cause emaciation, weakness, lameness, 

 and poverty of blood. The flesh of an animal badly 

 infested with measles may be pale, watery, or even 

 greasy, while pork not so much diseased may seem 

 all right, though it is really unfit for food, since if 

 eaten in an insufliciently cooked state by human 

 beings it would produce tapeworms. The measles 

 are most abundant in the muscles of the breast and 

 neck, and next to them in those of the hams and 

 shoulders. From twelve to twenty thousand measles 

 may be present in a single pig. 



The Unarmed Tapeworm of Man {Taenia saginata) 



lives in the intestine of man, and, as a bladder-worm 

 (CysticerGus), in the connective tissue of the muscles 

 of the ox (and especially in the calf). It is from 

 twelve to twenty feet, with as many as a thousand 

 joints, but does not possess a circlet of hooks. The 

 joints generally leave the intestine one by one, and 

 creep on to grass and herbs, where they burst, so that 

 the eggs are set free, and therefore get widely dis- 

 tributed. The ox scarcely ever takes in several joints 

 of Tcenia saginata, and consequently only a certain 

 number of eggs. Beef never, therefore, contains so 

 many measles as pork, and there is not a special 

 measle disease of oxen. As, however, the eggs of 

 Tcenia saginata are more widely distributed, calves 

 and oxen are more frequently infected with bladder- 

 worms than is the case with swine. 



The Coenurus Tapeworm of the Dog (Tcenia ccenurus) 



is the cause of the bladder- worm, producing sheep-gid, 

 or sturdy (Ccenurus cerebralis). This tapeworm, 

 which may live in the intestine of other animals 

 besides the dog, has a circlet of hooks, is from fourteen 

 to sixteen inches long, and consists of about two 

 hundred joints. It generally lives in the intestine 

 of the sheep-dog, in correspondence with which is the 



