Protista. 13 



A trypanosome, said to cause a fatal disease in cattle, was received from 

 Sebwe river, Toro Province, Uganda Protectorate. It was identified as T. naniim^ 

 and proved to be easily capable of transmission by Glossina palpaUs. Develop- 

 ment in the fly appears to commence in the bind gut and to extend forward 

 until tbe proboscis is reached. The salivary glands are not infected. 



Lewin (Cambridge). 



38) Duke, H. L., Antelope and their Relation to Trypanosomiasis. 

 In: Proc. Roy. Soc, London, Vol. B. 85, S. 156—169, 1912. 



By inoculation of citrated blood of freslüy-killed Situtunga {^Tragelaphus 

 speJiei) into monkeys and goats it was found tliat this species of antelope occur- 

 ring on the Island of Damba in Lake Victoria Nyanza may be in a state of 

 natural infection with Trypanosoma gambknse. The fact that this antelope can 

 act as a reservoir for the trypanosome mentioned explains fully how the wild 

 Glossina palpalis of Damba Island continue to be infective to monkeys although 

 the Island has been uninhabited for two years. The continued infectivity of the 

 mainland flies to T. gamUcnse may probably be explained on a similar hypothe- 

 sis, including possibly as reservoirs the other species of antelope frequenting 

 the lake shore, i. e. waterbuck, bushbuck, duiker and reedbuck. Observations on 

 hippopotami shot on the mainland or on Islands gave no evidence that these 

 animals act as reservoirs. The Situtunga and other antelope act as reservoirs for 

 T. vivax and T. uniforme^ to which the lake-shore flies have shewn continued in- 

 fectivity. Lewin (Cambridge). 



39) Fräser, A. D. and Duke, H. L., Antelope Infected with Trypa- 

 nosoma gambiense. In: Proc. Roy. Soc. London, Vol. B. 84, S. 484 — 492, 

 1912. 



The infectivity of antelope which had been long infected with a human 

 strain of Trypanosoma gambiense was investigated by feeding flies on them and 

 by injecting small quantities of blood into susceptible animals. 



One antelope infected 315 days previously was still capable of infecting 

 laboratory-bred Glossina palpaUs. 



A white rat could be inoculated with the disease by injection of blood 

 taken from an antelope 327 days after infection. The infectivity of an antelope 

 appears to diminish as the interval after its infection increases. 



It was also shewn that a duiker (antelope) can be infected with a human 

 strain of T. gambiense by means of Glossina palpaUs. Lewin (Cambridge). 



40) Fräser, A. D. and Duke, H. L., The Relation of Vv^ild -Animals to 

 Trypanosomiasis. In: Proc. Roy. Soc. London, Vol. B. 85, S. 2 — 3, 1912. 



The examination of 32 lake-shore antelope from a region where Glossina 

 palpalis was knowp to be infected with Trypanosoma gambiense, T. vivax, and T. 

 uniforme, revealed the presence of T. uniforme only. The injection of infected 

 blood into, and the feeding of infected flies upon bushpig, crocodile, monitor, 

 frog and fowls, were equally unsuccessful in producing an infection with T. 

 gambiense. An edible rat was infected by injection. Lewin (Cambridge). 



41) Fräser, A. D. and Duke, H. L., An Antelope Trypanosome. In: 

 Proc. Roy. Soc. London, VoL 85, Nr. B. 576, S. 1—2, 1912. 



A trypanosome corresponding morphologically to T. uniforme was found in 

 blood smears made from bushbuck and a situtunga shot on the shores of Lake 

 Victoria Nyanza. A goat developed the same trypanosome te'n days after in- 



