FIRST REPORT OF THE TRYPANOSOMIASIS 
EXPEDITION TO SENEGAMBI A (1902) 
I. INTRODUCTION 
WE arrived in Bathurst on the 2nd of September, 1902, and remained there tor 
three weeks. Cape St. Mary, seven miles from Bathurst, then became our 
headquarters, and we stayed there until the first week in January, when we 
went to McCarthy Island, which we made our base until we left for Senegal on the 
7th of May. Subsequent!-/, we remained in French territory until we left for England 
about the middle of June, 1903. While we were in the Gambia we arranged our 
movements so as to allow the study of the distribution and of the properties of the 
Gambian trypanosome to proceed simulta leously. To this end we established our 
laboratory at a convenient spot, as a base at which experimental work could be carried 
on, and from which short journeys could be made with the object of determining the 
frequency of trypanosomiasis among the natives. 
Our stay in Senegal was almost totally occupied in studying the sanitary 
conditions of the principal towns, and in drawing up a scheme, at the request of 
M. Roume, the Governor-General of French West Africa, on w hich to base an anti- 
mosquito campaign. 
A description of the work done in Senegal has been embodied in another report. 
This, 'The First Report' of our expedition, is intended to describe only a very small 
portion of the work done in the Gambia on trypanosomiasis. 
Although trypanosomes were found in men, horses, rats, mice, birds, snakes, 
tortoises, and frogs, we were able to study only those parasites found in men and 
horses. The distribution, clinical symptoms, and the m >rphology of these latter 
parasites, together with a synopsis of their reactions in experimental animals, will be 
first described ; there will then follow a brief description of the organisms seen in the 
remaining hosts. 
We shall only briefly mention our unsuccessful attempts to transmit the 
disease from infected to uninfected animals by means of biting flies. 
A second report will contain a more extended study of the results of animal 
inoculations of the various trypanosomata found in the Gambia. It will also contain 
our, at present incomplete, observations on their agglutinative powers and on the 
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