SURRA 



135 



trypanosomes. A discussion of the relationship of the several 

 trypanosomes is outside the scope of this work. The following 

 diseases caused by trypanosomes affect the domesticated animals: 



Table XL. — Trypanosomatoses 



In all of these, except dourine, transmission is supposed to be 

 by means of biting insects; in dourine the disease is transmitted 

 by copulation. 



SURRA 



The greatest losses from surra are among horses, mules and 

 asses. It is also naturally acquired by the camel, elephant, dog 

 and cat; cattle, buffaloes and caraboa are less susceptible. The 



