MALARIA 



193 



the mosquito sucks blood, to enter a red corpuscle and to recom- 

 mence the sexual cycle (U, Fig. 32). 



It is usually desirable, and sometimes very important, to be able 

 to diagnose the nature of the infection as well as the mere presence 

 of the parasite. To do this examinations should be made at intervals, 



FIG. 32. 



A-H, The asexual cycle in the human blood ; I-U, the sexual cycle 

 in the mosquito. 



(From the Malaria Number of the Practitioner, March, 1901). 



so as to observe the organism in various stages of its development. 

 Wet, living, preparations should on no account be forgotten, and 

 films should be carefully stained by a modification of the Romanowsky 

 stain (Wright's or Leishmann's). 



The following table (from Stitt, slightly modified) should now be 

 consulted. * 



