128 
REPORT OP TRAVELLING P XTHOLOOTST AND PROTOZOOLOCtIST 
Work at Hor, 
Rahr-El-Jeljel 
or Upper 
While Nile 
Fowl spirillosis 
Return 
journey 
Acknowledg¬ 
ments 
Detailed 
report, 
dysentery 
on the Sobiit, in the Hahr-El-Ghazal Province, and also in Uganda. At Bor several new 
hlood parasites were found, including a new form of Piroplasma in the zebra mouse. 
On January 31 the floating laboratory travelled North from Bor with the object of revisiting 
the Sobat. A stay of about a fortnight was made at the Mission Station, too short a time to 
thoroughly investigate the epidemic then prevailing amongst the cattle. I found, however, 
that dogs could be inoculated with T. nanim, though rats were practically always refractory. 
The infection proved fatal to dogs. I was unable to determine the transmitting agent. 
At Meshra-El-Eek, at Bor, and on one of the steamers running between Khartoum and 
Gondokoro, I saw chickens suffering from spirillosis. It would appear that this disease of 
fowls is very widespread throughout the Sudan. In a guinea fowl which died I found the 
peculiar intra-corpuscular bodies described by Dr. Balfour in the present volume as occurring 
in the blood of chickens which have suffered from an attack of spirillosis. Dr. Balfour has 
found that these bodies are derived from spirochtetes which have penetrated the corpuscles. 
It is evident, then, that guinea fowl are susceptible to chicken spirillosis. At Khartoum and 
elsewhere cattle were infected with sarcosporidia, while a curious eruption of white nodules on 
the ears of a wild rat was found to be due to one of the sarcosporidia. 
The return journey was commenced on February 16, and after a few days’ stay in 
Khartoum I left for home, reaching London on March 22, after an absence of a year and 
twenty-two days. 
The foregoing is a brief outline of the course taken by the floating laboratory on the 
Sobat and Jebel and in the Bahr-El-Ghazal Province, and the nature of the investigations 
undertaken. It will be seen that these are of a general nature, the length of stay at each 
place being too short for thoroughly investigating any one point. This plan was adopted 
as the Sudan is a comparatively new country, and it was desirable to investigate the dis¬ 
tribution of trypanosomiasis, piroplasmosis, and other similar conditions. In the following pages 
will be described in greater detail the results I have obtained. Before entering on tins part of 
my reijort I must take this opportunity of expressing my indebtedness to all those who have 
assisted me in my work in the Sudan. Wherever I have travelled on the Nile and wherever 
I have come in contact with them I have found the Government officials most willing to help 
me in every way, and many have put themselves to considerable trouble in order to render me 
assistance. I must not omit to mention my obligation to the Staff of the American Mission 
on the Sobat, wbo did much to facilitate my investigation of the cattle disease before 
mentioned. 
My tbanks are also due to Doctor Werner, who has identified reptiles and amphibia ; 
Professor Nuttall, who has identified ticks ; and Mr. Butler, Director of the Game Preservation 
Department in the Sudan, who identified birds and small mammals. Doctor Werner has 
written a report on the reptiles collected by me, and this is included in the present volume. 
Dr. Leiper, Helminthologist to the London School of Tropical Medicine, has described the 
collection of lielminthes {see patje 1S7). 
Human Conditions 
Dysentery 
While at Khartoum and later at Taufikia I conducted some investigations on the 
intestinal amoebee of man. On no occasion was I successful in finding an amoeba 
corresponding to Schaudinn’s Entamoeba histolytica, which is said by him to be the occasional 
cause of dysentery. •\moebiE corresponding with his Entarnceba coU were met with both in 
dysentery cases and in cases which appeared quite normal. Schaudinu gave certain 
