HAEMOSPORIDIA 



621 



velop into mature gametes in 1-2 minutes after blood is obtained 

 from an infected duck; macrogametes about 8ju in diameter; 4-8 mi- 

 crogametes, 15.7-24. In long, from a single microgametocyte; zygotes 

 are found in stomach contents of fly in 10-20 minutes after sucking 



Fig. 267. The life-cycle of Leucocytozoon simondi (Brumpt, modified), 

 a-c, development of macrogamete; d-f, development of microgametes; 

 g, fertilization; h, ookinete; i, j, ookinete piercing through the stomach 

 wall; k-m, development of sporozoites; n, sporozoites entering endo- 

 thelial cells; o-r, schizogony. 



in the infected blood of bird ; motile ookinetes abundant after 5 hours, 

 measure 33. 3m by 3-4.6^; 22 hours after sucking duck blood, oocysts 

 are found on outer wall of stomach; sporozoites mature probably in 

 24-48 hours; 5 days after a duck has been bitten by infected black 

 flies, schizogonic stages are noticed in endothelial cells of capillaries 

 of lungs, liver, spleen; on about 7th day gametocytes appear in blood ; 

 liver and spleen become hypertrophied ; the infection among duck- 



