MALARIA 221 



nalis, and the Lajnblia intestinalis. These forms may 

 infest the vagina, intestine, or lung, and cause some 

 irritation, probably not particularly inflammatory. 

 They are held responsible oftentimes for the inflamma- 

 tion set up by bacteria gaining entrance at the site 

 of the irritation by the protozoa. However, the 

 vaginitis and cystitis caused by the T. vaginalis are 

 serious matters in children. These are usually pear- 



FIG. 62. Trichomonas vaginalis. FIG. 03. Lamblia intfestinalis. 

 (Blochmann.) (Schewiakoff.) 



shaped bodies, with prominent nucleus and well- 

 marked anterior flagella. The trichomonas has a 

 heavy undulating membrane. 



SPOROZOA. 



Malaria. The most important disease caused by 

 protozoa is malaria. This is an infectious disease 

 characterized by intermittent chills, fever, and sweats, 

 with prostration and progressive anemia. It is com- 

 mon in lowlands, where stagnant water collects, or 

 in the vicinity of slowly moving water, permitting the 



