514 



Colonel Daniel B} 



[April 22, 



hospital suffering from other diseases were found to harbour these 

 parasites. 



Now, having seen that this trypanosome is found in the 

 blood aud cerebro-spinal fluid of all cases of sleeping sickness, and 

 that it is not found in the cerebro-spinal fluid of natives suffering 

 from other diseases, let me ask you to consider that in a slow and 

 chronic disease such as this, sometimes taking years to develop, 

 there must be many natives living in tbe sleeping sickness area 

 who have these trypanosomes in their blood without as yet showing 



