53 



PART 11. 



THE PATHOLOGY AND TREATMENT OF 

 HUMAN ENTOZOA. 



Chapter I. 



GENEEAL EEMAEKS. 



The manneb or distbibittiok of the Ektozoa in vabious 



PABTS OP THE BODY. — ThE CONDITIONS "WHICH INFLUENCE 

 THE EXISTENCE AND EEEQUENCT OF EnTOZOA. — ThE EFFECTS 

 OF GEOGEAPHICAL POSITION, OF CLIMATE, OF THE SEASONS, 

 OF MOISTUEE, OF DIET, OF SEX, OF CONSTITUTION, AND OF 

 AGE, UPON THE PEOPAGATION OF EntOZOA. — ThE SYMPTOMS 

 AND COMPLICATIONS CAUSED BY WOBMS. 



No part of the body, in vertebrated animals, is free 

 from the attacks of entozoa. The most inacces- 

 sible situations, such as the interior of the eye, the 

 brain, and the spinal canal, are sometimes affected 

 by these parasites ; and even the medullary cavity 

 of bones has furnished instances of their invasion. 



As a general rule, entozoa of the same species 

 are not found in different organs ; the small intes- 

 tine of man is the habitat of the ascaris lumbri- 

 coides, of the taenia solium, and of the bothrio- 

 cephalus latus, but neither of these species is nor- 

 mally met with in the stomach or in the large 

 intestine. The principal viscera of the body are 



