H. S. St annus 
311 
wanting in many cases. It is conceivable that considerable variation 
may occur in the lesions, due to variable intensity of the infection, 
etc., and this might explain the absence of infarcts, of enlarged 
glands in the infrascapular regions in the cases observed by myself, in 
which the jelly-like collections were replaced by what 1 have described 
as a haemorrhagic-oedematous process. 
One of the chief points of difference however lies in the fact that 
“amakebe” attacks young animals, the reverse being more commonly 
seen in this country, and again here the occurrence of apparently 
chronic cases has been noticed. 
I have not seen any suggestions as to the nature of the “ blue 
bodies ” but in various spleen smears seen by myself, appearances 
would seem to show conclusively that they have origin in the breaking 
up of laige mononuclear leucocytes. (Plate XXVIII.) Smears show these 
cells as in normal spleen smears but also others with red granules in 
their blue protoplasm; various stages may be seen of the breaking up 
of these cells with the separation of the cytoplasm containing the red 
granules and the assumption of the latter of a more or less circular 
form; in many cases the bare nucleus is seen with the rounded blue 
body lying at its side. Thus I am of opinion that the “ blue body ” is 
a part of a laige mononuclear leucocyte; whether the red granules 
within them are of a protozoal nature is undetermined. 
PLATE XXVIII. 
Koch’s “blue bodies” encountered in spleen smears of Nyasaland cattle. (See con¬ 
cluding paragraph of the text and legend at foot of Plate.) 
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