26 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
Table Showing Frequency with which Native Horses are Infected with 
Horse Trypanosome in the Colony of the Gambia 
Origin of Horses 
Number 
Exii m tried 
Number 
Infected 
Cases 
Owned bv natives, Bakau and Cape St. Mary District - 
6 
5 
i, ii, 111, iv, v 
Officers of West African Frontier Force, Bathurst 
+ 
2 
vi, ix 
Governor Denton, Bathurst 
3 
1 
X 
At Maka, French Territory, French Commandant, 
Monsieur H. Porthes - 
8 
2 
vii, viii 
Sallikene 
i 
0 
Sakuta, Kommbo - 
2 
0 
Lammin ------ - 
2 
0 
Birkama, Kommbo 
+ 
0 
Vmtang 
3 
0 
Bathurst Trading Co., Bathurst 
2 
0 
McCarthy Island ------- 
I 
0 
36 
10 
The total number examined is again too small to permit of a final conclusion as 
to the prevalence of horse trypanosomiasis in the Gambia. That a large percentage 
of horses are affected there is, we believe, no doubt. We were frequently told by 
Europeans of horses which died (while in the Gambia) with symptoms of disease.* 
A glance at the names of the towns in which infected animals were found shews 
that, like human trypanosomiasis, the disease extends from the sea coast to the end of 
British territory. Judging from the scarcity of horses in the Kommbo district, and 
the larger percentage infected, one would imagine that it is there that the disease is 
most common. Nevertheless it seems improbable that it obtains in Bathurst 
itself. I 
* Mr. A. K. Withers, a Travelling Commissioner, described to us a disease of which three horses out of twenty, owned 
at Quinela, had died during the month of December, 1902. His description very strongly suggests that these animals were 
suffering from trypanosomiasis. 
■f" One of the two horses examined at the Bathurst Trading Company, coming originally from Barra Point, had lived for 
over twenty years at Bathurst, and had always been, and still is, in excellent condition. During all this time it had never been 
further away from Bathurst than Cape St. Mar-'. Bathurst is believed locally to be not unhealthy for horses. 
We were also told while in Senegal, both by Government officials and traders, that in the Soudan, at Koli-chor and in 
the neighbourhood of Kaolakh, horses died from a disease producing symptoms closely resembling those observed in cases of 
equine trvpanojomiasis in the Gambia. 
While at St. Louis and Dakar we examined, with negative results, the blood of a few horses, mules, cattle, and camels 
which w ere not in the best of condition, and had been in districts where this disease was said to occur. 
