a handbook of the mosquitoes of north america - Systematic Catalog ...

FIGURE 16. Diagrammatic representation of the life-cycle of the benign
tertian malaria parasite (PZU.WZO~~UWZ Gvax) in man and the mosquito. Nos.
I to 4 show the growth of the parasite in the red blood cell; Nos. 5 & 6,
the mature schizont dividing into merozoites and their escape is shown in
7; these merozoites invade new red cells and the cycle continues. Nos. 8,
g & IO show the development of the male and the female gametocytes. The
mosquito is shown obtaining these sex cells. No. II, the male cells being
discharged; No. 12, the sperm cell uniting with the female cell; No 13, the
fertilized zygote ; No. 14, the migrating egg, or ookinete; No. 15, the
oocyst outside the stomach wall ,of the mosquito; No. 16, a nearly mature
oocyst ; No. 17, the stomach of a mosquito showing oocysts attached ;
No. 18, the discharge of the sporozoites by the breaking of the oocyst;
No. 19, sporozoites in the salivary glands; No. 20, the salivary glands
of a mosquito; No. 21, an anopheline is seen discharging sporozoites into
the blood stream of a new host; Nos. 22 to 28 shows the asexual cycle
in new host. (Modified from James.)