Ill
12. Are other varieties of trypanosomes found in Uganda ?
In addition to the Trypanosoma gambiense, trypanosomes from varions sources have been studied. In the last Report, it was shown that oxen in Entebbe belonging to the P.W.D. and sent for examination by Mr. Pordage, had trypanosomes in their blood. In the blood of government cattle at Jinja, Usoga, which were dying at the rate of five or six a day, a trypanosome was constantly found. In the blood of a dog kindly sent by Mr. R. J. Stordy, P.Y.O. Uganda and East Africa Protectorates, trypanosomes were present. This animal had accompanied the Abyssinian Boundary Commission. Lastly, in the blood of a mule of Col. Sadler’s at Entebbe, a trypanosome was found. The trypanosomes derived from these four sources have been studied side by side here.
13. The History and distribution of these trypanosomes in Uganda and East Africa.
A. The oxen of Mr. Pordage, as stated in the last Report, came to Entebbe from British East Africa about the end of 1900. They kept well until they were sent to graze in the forest near the Lake, in winch G-lossina palpalis is found. Since then they have been sick, and Mr. Pordage is of opinion that their illness was contracted whilst grazing there.
B. The cattle which became sick and died at Jinja Usoga, and in whose blood a trypanosome was found by us in August, 1903, came from the Bnkedi country in May, 1903. They had been in Wamia District to the south-Avest of Mount Elgon. The route by Avhich they were marched to Jinja Usoga was viâ Igagas, Kibuye, Baleale and Kitindis. They halted at each of these places, and at all of them a species of tsetse fly is found* To determine whether a trypanosoma occurs in the animals stationed at any of these places, the blood, of animals was examined at Kibuye. Mr. Grant kindly made slides from a number of animals in December, 1903. Of ten slides from different domestic animals, trypanosomes were found in tAvo, one in a slide from a donkey, and one from a cow. We were thus able to demonstrate that the necessary factors for the infection of the cattle were present at. the halting places.
C. A number of animals Avhich accompanied the Abyssinian Boundary Commission became sick and died, and an examination of one of the sick animals showed that trypanosomes were present in the blood. The animals affected Avere eleven Boran and Abyssinian ponies, as well as several camels and five English dogs. These all died. None of the Abyssinian donkeys or mules Avere affected. The English dog examined on August 26th, 1903, was half Airedale and half bull terrier. The animals marched from the boundary to Lake Rudolph, and thence viâ Baringo to Nakuru. Two ponies died at Nakuru. The journey from Baringo to Nakuru only occupies four days,
* Glossina pallidipes, see map by Mr. E. E. Austen, Report No. 13.