HAEMOSPORIDIA 



437 



P. vivax 



P. falciparum P. malariae 



Schizogony completed 



in 48 hours 



24-48 hours 



Diameter of ring form ^-^ of I of ery- 



erythrocyte throcyte, 

 delicate 



72 hours 



Wof 

 erythrocyte 



Size of infected cell 



Dots in infected cell 

 Grown schizonts 



Pigment granules in 

 organism 



Number of merozoites 

 from a schizont 



larger than 

 uninfected 

 one; paler 



Schtiffner's 

 dots 



amoeboid, 

 large 



rod-shaped 



15 or more 



same as unm- same as unm- 

 fected one fected one; 



distorted 



Maurer's dots not seen 



round, small elongate oval, 

 medium 



small triangu- large, irregu- 

 lar lar 



about 8-10 or 8-10 

 more 



Merozoites arranged in in 2 rings or 

 erythrocyte scattered 



Gametocytes 



rounded 



2 rings or 

 scattered 



crescentic 



one rmg 



aided 



P. praecox (Grassi et Feletti) (Fig. 199, a-e). In English and 

 Spanish sparrows; schizogony completed in 30-36 hours; number 

 of merozoites from a single schizont 8-15; gametocytes crescentic; 

 pigments occur in both schizonts and gametocytes; sexual cycle 

 takes place in female culicine mosquitoes ; organism maintains its 

 characteristics when inoculated into canaries, Serinus canaria. 



P. cathemerium Hartman (Fig. 199, /-O- In sparrows, cowbirds, 

 and red-winged blackbirds; schizogony completed in 24 hours; 

 number of merozoites 6-24; gametocytes spherical, with rod- 

 shaped pigment granules; pigment granules in microgametocytes 

 longer and more pointed than those in macrogametocytes ; macro- 

 gametocytes usually stain more deeply, schizonts without vacu- 

 oles; pigments in schizonts amorphous mass; merozoites 1^ long; 

 mature schizonts and gametocytes 7-8m in diameter; transmitted 

 by, or sexual reproduction in, Culex pipiens, C. salinarius, C. ter- 



