614 



PROTOZOOLOGY 





feiy w? iit* 



Fig. 263. Plasmodium of monkeys. Column 1, ring forms; 2, 3, growing 

 trophozoites; 4, segmenting schizonts; 5, macrogametocytes; 6, micro- 

 gametocytes. a-f, Plasmodium kochi, X1665 (Gonder and Berenberg- 

 Gossler); g-1, P. brasilianum, X1665; m-r, P. cynomolgi, X2000; s-x, P. 

 knowlesi, X2000 CTaliaferro and Taliaferro). 



P. knowlesi Sinton and Mulligan (Fig. 263, s-x). In Macaca irus; 

 experimentally man is susceptible; schizogonic cycle in 24 hours; six 

 to 16 merozoites; infected erythrocytes are somewhat distorted. 

 Morphology and development (Brug, 1934; Mulligan, 1935; Talia- 

 ferro and Taliaferro, 1949); infections in man (Milam and Cogge- 

 shall, 1938). 



P. berghei Vincke and Lips. In the tree rat, Thamnomys surdaster 

 of Congo (Vincke and Lips, 1948). White mice, white rats, cotton 

 rats, the field vole (Microtus guntheri) and the golden hamster 

 {Mesocricetus auratus) are susceptible; mosquito vector, Anopheles 

 dureni (Mercado and Coatney, 1951). 



Many species of Plasmodium have been reported from numerous 

 species of birds in which are observed clinical symptoms and path- 

 logical changes similar to those which exist in man with malaria 

 infection. In recent years the exoerythrocytic stages have been in- 

 tensively studied in these forms. According to Hegner and co- 



