S6o 



Sleeping Sickness 



some forms of the parasite appear in the blood in about a week, 

 then may disappear. The animals Hve a month or two. 

 Diagnosis.— As the trypanosomes are present in the circulating 





t; 







*vjsri®J-J «•■ 





1 i ^if J 



*5 



(4^ V I 









\ 



J X l,.X. "o'w 'Xiv' /r ujA' 



Xf li^w 



>T3l'..'U" 



.'^')'".. "> 









■iWKf^Sb^ 



V"SIS"^ 







R,L.<,J1tpPAKD. 



Fig. 2i8. — Schizotrypanum criizi developing in the tissues of the guinea-pig. i. 

 Cross-section of a striated muscle fiber containing Schizotrypanum cruzi: Note 

 dividing forms. 2. Section of brain showing a Schizotrypanum cyst within a 

 neuroglia cell, containing chiefly flagellated forms. 3. Section through the 

 suprarenal capsule, fascicular zone. 4. Section of brain showing a neuroglia cell 

 fllled with round forms of Schizotrypanum (From Low, in Sleeping Sickness 

 Bulletin, after Vianna). 



blood of human beings in somewhat small numbers, and only at 

 certain times, it is unwise to rely upon them as a means of making 



