420 



DISEASES OF THE BLOOD. 



clistm-bance is due to piroplasmosis is furnished by examination of the 

 l)lood, in which the parasites may be fomid in very small numbers in 

 certain blood cor|3UScles. 



Calves seldom take the disease except in the benign form. 



Fig. 194. — A, red blood corpuscles containing pear-shaped Pirojjlasma higeDiimim 

 (the typical form) ; B, red blood corpuscles containing round Piroplasma bige- 

 ■iiiimnii. (After Ijij^nieres.) 



Lesions. At first glance the lesions appear to resemble those of 

 anthrax, but may l>e differentiated from them in many details. 



The skin is covered with ticks or shows traces of their punctures. 



Fig. 195. 



The myocardium appears as if boiled, the spleen is invariably 

 hypertrophied and two or three times as large as in the normal state. 



The kidneys are violet in colour and congested, and the adipose 

 layer surrounding the kidney is infiltrated with a yellowish serosity. 



