ANIMAL PARASITES. 



137 



are 10-12 millimeters long by 5-6 millimeters broad; 

 and the length of the whole worm varies between 6 

 and 9 feet. The head is provided with four suckers, 

 and a double row of booklets, a fact from which has 

 arisen the name ''armed tape-worm." 

 The ingestion of insufficiently cooked 

 '^measled" pork is responsible for 

 infestment. 



Usually only a single worm is found 

 in one individual, but more may occur. 

 TcEiiia solium is a much more danger- 

 ous parasite than tcenia saginata be- 

 cause man may be the host for both 

 the adult and bladder- worms ; on this 

 account a person that harbors this 

 parasite should be especially careful 

 not to carry a soiled hand to the mouth 

 or allow it to contaminate food. 



The adult worm per se gives rise to 

 few or no symptoms, but if its eggs 

 are ingested, the embryos, besides be- 

 inff distributed to muscles, may also ^ ^., , . 



^ ' -^ Fig. is.—Dtbothrw- 



find lodgment in important organs, cephains latus. (Tyson, 



. , , . 1 . , after Leuckart.) 



e.g., the bram, eye, hver, etc. 



j^ This, the longest tape-worm met in man, 



cEPHALus ^^ commonest along the Baltic Sea, in 

 Latus (Both- Japan, and in Switzerland. It is also said 

 riocephalus to be of frequent occurrence in Munich, 

 latus). xhe parasite measures from 6 to 30 feet 



