236 



DISEASES DUE TO HELMINTHS 



TREATMENT. 



In cases of diarrhoea of obscure causation examine the fcTces, urine 

 and sputum microscopically. 



Be careful about domesticated animals ; they are often a source of 

 infection. 



All green vegetables should be cooked. 



Avoid the so-called edible snail. 



For the specific treatment see the following paragraphs. 



THE CLASSIFICATION OF TREMATODES. 



There are three important families : — 

 (i) Fasciolidce, having two testes. 



(2) Schistosomid^e, having one testis. 



(3) Paraphistomidie, having two testes. 

 For other details see previous tables. 



THE PATHOGENIC VARIETIES. 



These will now be dealt with serintim. 



Watsonius watsoni causes diarrho'a and anaemia. 



It lives in the small intestine and inflames the mucosa. 



It has two pharyngeal pouches. 



The oesophagus divides into tAvo long intestinal caeca arranged 

 laterally. 



The testes are lobulated and lie the one behind the other in the 

 mid-line. 



The ovary lies behind the testes. 



Treat Avith eucalyptus and chloroform as in Ankylostomiasis. 



Fasciola hepatica has usually been found in the liver of man, but 

 it has been .found also in the blood-vessels, in the cranial cavit>-, and 

 about the feet, forming there superficial abscesses. 



It is the common liver fluke of herbivorous animals. 



It is very common in Africa, Burmah, Egypt and other parts. 



It is very widelv spread. It is the cause of the dreaded " sheep 

 rot." 



The intestine divides into two principal lateral c^eca, which in turn 

 give olT man}' branched c^eca. 



The two testes are much branched and lie behind each other in the 

 mid-line. 



In front of the ventral sucker is a cirrus pouch. 



The ovary is tubular and branched. It lies above and in front of 

 the testes. 



These worms are situated in the bile ducts and cannot be dislodged. 



