332 TRYPANOSOMA PECAUDI [CH. 



REFERENCES. 



Austen (1911). Handbook of Tsetse Flies. 



Bruce (1895). Preliminary Report on the Tsetse Fly disease or Nagana 



in Zitlnland. Ubombo, Zululand. Further Report, 1896. 

 Bruce, Hamerton, Bateman and Mackie (1910). Proc. Roy. Sac. B, 



vol. LXXXIII. 



Kleine (1909). Deutsche Med. Woch. Nos. 11, 21, 29 and 45. 

 Kleine and Taute (191 1). Arb. a. d. Kais. Gesundheitsamte, vol. xxxi. 

 Laveran andMesnil (1912). Trypanosomes et Trypanosomiases. Paris: 

 Masson et Cie. 



Baleri (T. pecaudi Laveran, 1907). 



General account. In 1904, Cazalbou observed a trypanosome 

 in the blood of a horse from the Bani region of Northern Nigeria. 

 This animal was suffering from a disease known by the natives 

 as Baleri. In 1907, Laveran described the trypanosome under 

 the name of T. pecaudi, and since this time Baleri has been 

 recorded from many parts of Tropical Africa. 



It is common in the Upper Senegal and Nigeria, especially 

 in the basins of the Niger, Bani, and the Upper Volta. It has 

 also been observed in the Lower Senegal, Ivory Coast, Dahomey, 

 French Congo, and in the region of Chari. In Bahr el Ghazal, 

 Balfour and Wenyon have observed in dromedaries and horses 

 infections probably due to T. pecaudi. 



Baleri is especially a disease of horses and donkeys, but 

 cattle are also susceptible to infection. The disease is charac- 

 terised by the occurrence of febrile attacks that are repeated 

 every three, four or five days. The trypanosomes are generally 

 numerous during the first attacks, becoming rare towards the 

 end of the infection. In horses the disease is practically always 

 fatal, after a duration of from three to four months. Donkeys 

 are less susceptible and may remain infected for nearly two 

 years before death supervenes. 



A large number of animals may be experimentally infected 

 with T. pecaudi and the symptoms vary according to the species. 

 Cattle, goats, sheep and pigs are very resistant to the infection 

 and generally recover. On the other hand, monkeys, dogs, 

 cats, guinea-pigs, rats and mice are all susceptible and the 



