HAEMOSPORIDIA 



infected blood into gut lumen, isogametes, 5.5-6> long, are produced; 

 isogamy results in motile club-shaped ookinetes, 7- 12m long, which 

 pass through gut wall and invade larger ova (1-2, in one case about 

 50, ookinetes per egg) ; each ookinete rounds itself up into a sporont 

 7.5-12m in diameter, which grows in size and whose nucleus divides 

 repeatedly; thus are produced multinucleated (4-32 nuclei) amoe- 

 boid sporokinetes, up to 15m long, which now migrate throughout 



Fig. 268. The life-cycle of Babesia bigemina (Dennis), a-f, division in 

 erythrocytes of cattle; g, h, gametocytes; i, isogametes; j, fertilization; 

 k, zygote; 1, ookinete penetrating through the gut wall; m, ookinete in 

 host egg; n-p, sporoblast-formation; q, sporokinetes in a large em- 

 bryonic cell; r, sporozoites in salivary gland. 



