TEXAS FEVER 



119 



forming a straight line. The smaller forms appear as a rule 

 homogenous, the large forms contain a minute spherical body, not 

 over 0.1-0.2/x in diameter, which appears darker than the re- 

 mainder of the body of the parasite. In the largest pyriform bodies, 

 a larger rounded or oval body 0.5-1. 0/x in diameter may be ob- 



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Fig. 12. Babesia bigemina. 1, blood obtained postmortem; 2, before death 

 (Smith and Kilbourne); 3-10, different forms of the parasite (Kossel). 



served situated in the center of each broad rounded end. The 

 infected red corpuscles show crenated margins and may be darker 

 than the uninfected corpuscles; they have lost their flexibility, 

 retaining the disc form even after uninfected corpuscles have 

 become shrivelled and folded in preparations that have been made 



