KALA-AZAR 



203 



in whose presence they multiply without hindrance. 

 Only monkeys and dogs are susceptible to the amebae 

 causing disease in man. No therapy depending on 

 antitoxins or vaccines is practicable. 



MASTIGOPHORA 



Kala-azar. In the next group of protozoa, the flagel- 

 lata, several are pathogenic for man. Kala-azar is a 





Protozoa in a case of tropical ulcer. X 1500 approximately. (Aftei Wright.) 



peculiar, slow disease, called by various names, depend- 

 ing upon its locality dumdum fever, kala-azar, etc. 

 exhibiting a large spleen, hemorrhages, anemia, and 



