832 MICROBIOLOGY OE DISEASES OF MAN AND DOMESTIC ANIMALS 



Trypanosoma equinum (Voges) ; it is probably transmitted by a biting 

 fly, Stomoxys. 



All through Asia, Surra, caused by Trypanosoma evansi (Steel), is a 

 s^evere disease of cattle and equines; it is probably transmitted by a 

 biting fly. 



Trypanosoma dimorphon (Laveran and Mesnil) and many other 

 trypanosomes, more or less closely aUied to it, cause diseases of 

 horses, cattle, and other domestic animals in many parts of Africa; 

 they are probably all transmitted by the bites of flies. 



Fig. 177. — Colonization in Trypanosoma lewisi (Kent). {From Doflein.) 



One of the commonest trypanosomes is Trypanosoma lewisi (Kent). 

 It is usually a harmless parasite and it is found in rats in all parts of 

 the world. It is transmitted by the flea and possibly by the lice 

 which infest these animals. It is not transmissible to other mammals. 



Dourine or maladie de coit, is a serious disease of equines; it is 

 caused by Trypanosoma equiperdum (Doflein). This disease was 



