SPECIAL BACTERIOLOGY 
191 
of the development. The prevention of malaria requires 
the destruction of swamps and marshes—the breeding 
places of mosquitos, the screening of the houses and the 
administration of quinine, which is a specific for ma¬ 
laria. 
The Typhus Fever 
Typhus fever, which has nothing to do with typhoid 
fever, is very seldom met with in this country, hut is 
very frequent in. some parts of Europe—Russia, 
Roumania, Servia, etc. The disease is characterized by 
severe fever, rash and intoxication symptoms, and is a 
very dangerous malady. The organism causing it was 
discovered in 1914, by an American bacteriologist, Plotz. 
It is an anaerobic bacillus, and has been definitely proved 
to be the true cause of typhus fever. No definite work 
has yet been completed with regard to immune treat¬ 
ment, but it is well known that the prevention depends 
on cleanliness, as the bacilli very often are carried by 
body lice. 
