2 MOSQUITO ERADICATION 



When man is infected, a non-sexual cycle, known as schizogony, 

 begins, which takes from 48 to 72 hours. The sporozoite bores 

 into a red cell, becomes round, increases in size and finally divides 

 into a number of sporozoites, each of which repeats this process. 



Fig. 1. — The malaria parasite and its life cycle. (After John B. Smith, New 

 Jersey Agricultural Experiment Stations.) 



Anopheles Mosquito and Malaria: A, larva; B, pupa; O, adult; D, the blast- 

 introduced into the blood by the mosquito; E to J, stages through which the 

 Plasmodium passes in the red blood corpuscles; K, the spores, which enter new 

 blood corpuscles; L, M, the microgamete; N, O, the macrogamete; P, flagellae 

 forming; V, union of a flagellum with a macrogamete; R, fusion of nuclei; S, 

 the vermicule; T to Y, formation of the zygote in the stomach of the mosquito, 

 the fully developed zygote, Y, rupturing to produce blasts. 



In about 2 weeks, the sporozoites become so numerous that the 

 toxin liberated at each division is sufficient to cause chills. 

 Eventually, sexual forms appear, the females being known as 

 macrogametes and the males as microgametocytes. When the 



