416 



SPECIFIC MICRO-ORGANISMS 



small oval parasite 1 situated at the side of the nucleus of 

 the blood cell. The latter appears to be an erythroblast, an 

 immature red blood cell in which there is little or no hemoglo- 



D 



FIG. i 86. Hamoproieus (Leukocytozoon) ziemanni in the blood of an owl with 

 a pure infection. A , Young parasite in an erythroblast. B, Growing parasite distort- 

 ing the nucleus of the host-cell. C and D, Further stages of growth with marked 

 distortion of the nucleus and of the outline of the host cell. E, Full-grown macro- 

 gametocyte. F, Macrogametocyte and microgametocyte in the same field. G, Forma- 

 tion of microgametes from the microgametocyte. (After micro photo graphs of Prof. 

 F. G. Novy.) 



bin. As the parasite enlarges, the host cell becomes swollen and 

 its nucleus much flattened and distorted. The parasite itself 



1 The description here given is derived in part from unpublished observations 

 by Novy and MacNeal. See Proc. Soc. Exp. Biol. and Med., 1904-05, Vol. II, 

 pp. 23-28; American Medicine, 1904, Vol. VIII, pp. 932-934. 



