CHAPTER III 



SOME OTHER TRYPANOSOMES AND ALLIED 

 PARASITES 



THE human races are not the only victims of 

 trypanosomiasis. The disease may occur with 

 more or less disastrous results in many domestic 

 animals, such as cattle, horses and camels ; in the 

 big game of Africa, where bushbucks, antelopes, 

 gazelles, gnus, and other hoofed animals are 

 affected ; in birds, reptiles, amphibians, and fishes. 



Those pioneers of travel and industry to whose 

 efforts the opening up of Africa was due, were 

 hampered at practically every step by the death of 

 their transport animals. Horses and oxen alike fell 

 victims to the " fly " or " tsetse disease," and even 

 mules, asses, and dogs sometimes were attacked and 

 succumbed to the same pest. The pioneers in 

 Zululand recognized the difficulty, and that the 

 continuous destruction of their means of transport 

 was fatal to the development of the industries of the 

 land. In 1894 Sir D. Bruce investigated the prob- 

 lem of the fly-disease, or " nagana," in Zululand. 

 The " fly-belt " was the tract of country that meant 

 death to horses or cattle crossing it, and it was 



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