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if not identical trypanosome occurs in Togo, German 
East Africa, Transcaucasia and India (T. lingardi). 
Symptoms. —(i) Progressive anaemia ; (2) Slight 
fever lasting a few days only. The disease in South 
Africa is often complicated by infection with Piroplasma 
or Spirochaetes. The trypanosome is strictly specific, 
i.e., only cattle can be infected. 
Blood Examination .—Trypanosomes are found 
during the first fortnight of the disease. 
Morphology. —(1) It is the largest of known try¬ 
panosomes. Two forms occur (a) T. theileri , (i) large 
forms 60-70/* by 4-5/*; (ii) small forms 25-530/* 
by 2-3/*. (b) E. transvaaliense. In this form the 
oval nucleus is posterior almost touching the blepharo- 
plast 18-50/* by 4-6/*. Whether these two forms are 
different, or varieties, or developmental forms of one 
another, is doubtful. 
(2) Another characteristic feature is the extremely 
drawn-out posterior end. 
(3) The blepharoplast is oval, situated at right 
angles to the long axis (cp. E. lewisi ), and often 
appears as if partly divided (diplosome). 
In this trypanosome, from its great size, the 
mynoneme fibres are fairly readily seen, in stained 
specimens, in those parts where the trypanosomes have 
suffered compression. 
Pathology .—There is icterus of the tissues. The 
spleen and mesenteric glands are enlarged. Whether 
these changes are due to the trypanosomes or some 
other co-existent infection is doubtful. 
Transmission .—The disease in South Africa is 
transmitted by Hippobosca rufipes. 
7. E. dimorphum (Laveran and Mesnil, 1904).— 
The cause of a chronic disease in horses in Gambia. 
