210 



TROPICAL MEDICINE AND HYGIENE 



Whilst it seems clear that the African relapsing fever 

 is even clinically a distinct disease the differences between 

 the three other forms are less marked. As regards the 

 parasites, Mackie proposes to call that in Asiatic relapsing 

 fever S. carteri, and in the American S. novyi. S. ober- 

 meieri is the name used for the parasite in European 

 relapsing fever S. recurrentis is more correct and 

 S. duttoni in the African. The differences in the para- 

 sites are shown in the following table : 



The form of relapsing fever occurring in Algeria, 

 Egypt and the Sudan is not the African species S. duttoni. 

 Possibly it is a new species and is considered to be so by 

 Balfour. 



