Oli 



VNl.MAI, lUVI-ANDSOMlASKS IN I'HK ANUljO-liUYPTlAN HIDAN 



Xucli II.-. l> situatL'fl in the iijiilcUu of tlic ti v[)iinos()iiio and is oval or louiMt in 

 structure. 



I'lidiiliiliiri/ iiifiiiliniiii . Well developed and shows well-pionounced folds and 

 undulations. 



Fliiiirlhnii. Free in ull lornis found, and as sucli, measures fi'oin 5 to 7 niicions. 



Animal Inocui.a tions and J{ inactions 



It will bu seen from these results that, though this trypanosomiasis sometimes runs 

 an acute course in gerbils, it also at times occurs as a chronic type, the trypanosomes 

 disappearinj; from the lilood for several days at a time, to reappear and swarm again 

 with another subsequent disappearance. 



In rabbits the disease is chronic, blepharitis and baldness being symptoms, and the 

 disease resembles in every way in this animal the effects produced by Surra. 



In guinea-pigs the disease is chronic and shows no marked characteristics. Dogs 

 are susceptible and die witli niark('d splenic (enlargement, the symptoms ajjpearing to he 

 indistinguishable from Surra. 



3. I'liltnrc. All experimental efforts, so far as culture goes, in these laboratories 

 have been failures. The cultivation evidently presents more dilliculties than that of 

 Type 1, certainly as far as our present methods go. 



4. ('arrier. In both the Red Sea Province and Kordofan the natives attribute the 

 disease to the agency of the seroot fly. As far as one can definitely say anything on 

 this heading in the first-named of these regions, Tahuuns nujix is the causal agent of 

 transmission ; in the latter Tdbuiiiis fn'in'ula. In both jdaces several species of Tn7«iM«.< 

 exist, and species of Hippoboyca are also found. 



5. Ueactiun tu dnif)s'. The disease in the laboratoiy animals available at jiresent 

 being of a chronic nature, it has been deemed unsatisfactory to quote any experiments 

 with this trypanosome as the chronicity of tlie disease tends to make the results 

 misleading. 



It is interesting here as a footnote to this section to state tliat Sir John McFadyean 

 is not quite in agreement with the writer of this paper on the close resemblance of our 

 Type 2 trypanosome to that of Indian Surra. He states in a letter to the Director of 

 these laboratories " I liave still tin? camel trypanosome running. I do not think that it 

 corresponds with the Indian T. cnnisi, but it is a very hard nuitter to distinguish between 

 some of the trypanosomes from morpliological characters." 



