The Transmission of Trypanosoma nanum (Laveran). 



5 



Animal Eeactions. 



The original goat (688) sent by Dr. van Someren shortly after inoculation 

 is at present (October 20, 1911) apparently in excellent health. Trypano- 

 somes are visible in its blood only at rare intervals. 



The following animals were sub-inoculated from goat, Experiment 688 : — 



17.3.11.., 

 27.3.11.. 

 15.4.11... 

 17.3.11... 

 27.3.11.. 

 19.4.11.. 

 19.4.11.. 

 26.5.11.. 

 17.5.11.. 



Monkey 6 



Puppy 11 

 „ 89 

 Wild pig 

 Sheep 59 

 Goat 64 



No trypanosoin 



a for 54 days. 



Transmission of Trypanosoma nanum by G-lossina palpalis. 



In the following experiments, laboratory-bred flies were employed, 

 hatched from pupte brought from Damba Island. The first six attempts 

 at transmission failed, and the brief summary of these experiments given in 

 Table I will suffice. 



It will be noticed that in every case the flies were first fed upon 

 Goat 688, the animal received from Toro. 



Table I. 



merit 

 No. 



Date of 

 commence- 

 ment. 



Number of days. 



Number of flies. 



Eesult. 



Animal 

 on which flies 

 were fed. 



On 

 Goat 688. 



Erperi- 



At 

 30tb day 



! Dissected 

 during 

 experiment. 



25 



27.4.11 



10 



50 



16 



17 





Normal Calf 43 



27 



29.4.11 



I 





19 



22 







32 



1.5.11 





49 



12 



1 16 







36 



3.5.11 



4 



47 



28 



28 







57 



15.5.11 



3 



56 



35 



47 







86 



25.5.11 



7 



47 



30 



| 43 







A further set of experiments were now started and Sheep 59 employed for 

 the first time for the infecting feeds. It was found that the flies fed much 



