212 REPORTS ON" TSETSE-FLY DISEASE IN NYASALAND. 



12. Mombera. 



(a) Trypanosomiasis. No deaths. 



-(b) Other causes. Disease appeared in 1902. In 1907 an epidemic broke 



out resulting in 550 deaths, equal to 2^ per cent. In January, 1908, a 



imilar outbreak with 250 deaths, or 1 to 1;^ per cent. Disease disappeared 



n April. From blood-slides, disease first diagnosed as East Coast Fever. 



From subsequent examinations this is refuted. Yeterinnry expert now 



investigating. 



13. North Nyasa. 



(a) Trypanosomiasis. Not known. 



(b) Other causes. Outbreaks similar to that experienced in Mombera 

 district, though younger cattle about 12 months old generally attacked. 

 In 1907 an outbreak was diagnosed as Catarrh. It recurred in 1908 and 

 resulted in 75 per cent. o£ the total deaths, which were about 1 per cent.. 

 Dr. Davey made exhaustive investigations, but failed to discover much 

 except that in the stomachs o£ most calves blood-sucking v/orms * were 

 found, and in others ulcerated intestines. He considers the disease is more 

 likely to be due to a bacillus than a parasite. 



Total mortality amongst 11,208 head estimated at I- to 1 per cent. 



(Signed) JOHN B. KEEBLE, 



Acting Chief Assistant Secretary.. 

 Zomba, 7tli October, 1909. 



* \_Haemonchiis confortus — which might well account for some of the deaths. — Ed. 



