THE MALARIAL PARASITE. 



635 



ripening of a generation of the parasites. He also concludes from 

 his observations that the number of parasites shown to be present 

 by a microscopical examination of the blood corresponds, in a 

 general way, with the severity of the attack. These observations 

 have been confirmed by Osier, Antolisei, and others. Golgi has 

 noted differences between the Plasmodium as found in the tertian 

 type of intermittent and that found in quartan fevers ; and these 

 differences are sufficiently marked to enable him to determine the 

 type of fever by a blood examination. These observations have 

 been confirmed by numerous competent pathologists in various 

 parts of the world. When a daily paroxysm occurs, according to 

 Golgi, this is due to the alternate development of two groups of 

 quartan parasites. He has not been able to demonstrate a special 

 parasite of quotidian fevers having a cycle of intracorpuscular 

 development lasting twenty-four hours. 



The differences between the evolution of the tertian and quar- 

 tan parasite are summarized as follows by Laveran, from the data 

 given by Golgi : 



The tertian parasite completes its evolution in two days, the 

 quartan in three days. 



The amoeboid movements of the tertian parasite are much 

 more active than those of the quartan. 



Fig. 3. Crescentic and Flagellate Forms Chaeacteeistic of " ^stivo-Autuitnal " 



Malaeial Fevees. 



The tertian parasites cause a rapid decoloration of the red 

 blood- corpuscles invaded by them, while the corpuscles retain 

 their characteristic color when invaded by the quartan parasite 

 up to the time that they are almost destroyed as a result of its 

 intracorpuscular development. 



