420 



TRYPANOSOMID^ 



the same organism as that described by Scott Macfie in 1913 as 

 T. nigeriense. Yorke and Blacklock in 1915 consider that man 

 is the chief reservoir of this parasite in Sierra Leone, where sleeping 



1 



Fig. 105.- — Castellanella gambiensis [DviTON, 1902). (x 1,200 Diameters.) 

 Long form from the original Gambia fever case (Mr. K.) discovered by 

 Button. (Photomicrograph.) 



sickness is very chronic and difficult to recognize. A secondary 

 reservoir is in cattle. They record two cases with very mild 

 symptoms. Sartory, Lasseur, and Brissaud record C. gamhiensis 



Fig. 106. — Castellanella gamhiensis (Dutton, 1902). (X 1,200 Diameters.) 



Original Gambia specimens from a rat inoculated from the second case of 

 Gambia fever, showing polymorphism — i.e., long, intermediate, and short 

 forms. 



trypanosomiasis in a French soldier who had left Africa for eight 

 years, and had never been in a tsetse-fly area. In Africa he lived 



12 

 II 



10 

 9 



?7 



5; 



y 6 

 ^ 5 

 4 

 3 

 2 



Q 



15 



16 



17 



te 



!9 



20 



21 



22 



23 



24 



25 



26 



27, 



28 



29 



30 



31 



32 



33 





35 



36 

































































sJ 













































































































































































i\ 







































































































































































































































































































Fig. 107. — Castellanella gamhiensis JDvtto'n). Chart of Lengths. 



in Algiers, at El Golea, and went to Tiniimoun. Bagshawe draws 

 attention to Nepveu's 1888 and 1890 observations, which have 

 never been explained. 



