5b« SWINE IN AMERICA 



a larval state. At the left the mature male worm is 

 shown, and in the center the female. The male is the 

 smaller of the two, and is easily distinguished from the 

 female. They reproduce themselves within a few days 

 after lodgment in the intestines and in great numbers, 

 one female yielding from 5,000 to 15,000 living young. 

 The young, which can be seen in the figure in the act of 

 emission, begin their migration soon after birth and 

 reach the voluntary muscles in a manner yet somewhat 

 in doubt, after which they become encysted, as shown 

 at the right. They remain in this state until they are 

 again taken into the stomach, where they are liberated 

 by the gastric juice and again reproduce themselves. 

 These parasites are only visible under the microscope, 

 and for this reason their presence in the system may 

 escape the notice of the ordinary practitioner. 



QUESTIONS AND ANSWERS 



If the embryo tapeworm is taken into the human 

 stomach, does it remain there in a different state, or does 

 it pass into a different part? Answer. When the measle 

 in its cystic form is taken into the stomach, the gastric 

 juice dissolves the cyst, liberating the embryo. It then 

 passes into the intestines, where it affixes itself and de- 

 velops into a mature worm. 



How does the pig get the measles? Anszvcr. By 

 eating the mature segments or eggs which are discharged 

 with the excrement by persons having Taenia solium, the 

 ordinary tapeworm. 



