124 INFECTIOUS DISEASES DUE TO PROTOZOA 



within red corpuscles though parasites are found free in the blood. 

 Parasites were found by Nocard and Motas within 36 hours after 

 inoculation in the most rapid case, usually, however, it was two 

 days before they were found even after intravenous inoculation; 

 after subcutaneous or intermuscular inoculation it was usually 





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Fig. 13. Babesia cams (Nuttall and Graham-Smith). 



five or six days before the parasites were found. Robertson did 

 not find them before the fourth day after inoculation though the 

 blood from a dog three days after inoculation proved to be virulent. 

 Nuttall and Graham-Smith found that the parasites made their 

 appearance in appreciable numbers in the peripheral blood im- 

 mediately before the onset of fever. In one case parasites were 

 first found in films on the sixth day of the disease; in most of their 

 other cases parasites appeared between the eighth and twelfth 

 days after infection. 



Babesia canis has a striking resemblance to the parasite of 

 Texas fever. Piana and Galli-Valerio from its morphology named 

 it Pyrosoma bigeminum var. canis. Nocard and Motas state that 

 morphologically the hematozoan is identical with that of cattle. 



