MALARIA 



225 



chronously with which we have the chill. By this 

 bursting young forms are again set free in the blood, 

 each capable of entering other red blood cells. Of 

 course, not all the cells are affected, but in severe cases 

 one of every thirty red blood cells may contain the 

 parasites, but as the disease progresses and successive 



FIG. 68. In Culex the palpse (a) of the female are very short, 

 of the male arc longer than the proboscis; in Anopheles the palpaj 

 (6) of both sexes are about equal in length with the proboscis. (From 

 Kolle and Hetsch.) 



crops of corpuscles are destroyed the sum total of the 

 damage may be great. As a result of this, severe 

 grades of anemia result. The cycle of development 

 from the young form to the bursting requires forty- 

 eight hours for the tertian malaria and seventy-two 

 hours for quartan malaria, while in estivo-autumnal 

 malaria there is a slowly progressive attack on suc- 

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