184 MICROBES, FERMENTS, AND MOULDS. 
have also observed the parasitic nature of intermittent 
fever in Algeria. The organism which they have 
constantly found in the blood of those affected by 
marsh fever presents several different aspects, but 
appears especially to attack the red corpuscle of the 
Fig. 84.—Parasite of intermittent fever ( A de : A, normal hematin; B, B, corpuscle 
No.1; C, corpuscle No, 2, motionless; TD), corpuscle No. 2, containing mobile 
pigmented grains ; Ki, corpuscle No. 2, provided with mobile filaments; G, detached 
mobile filament; H, H, corpuscle No, 3; I, K, corpuscle No. 2, of small size, 
red and agglomerated; 1, L, hematins to which the small corpuscles No. 2 are 
attached; M, pigmented leucocytes, their nuclei made visible by carmine. 
blood, in which, according to Laveran’s expression, 
“it is encysted like a weevil in a grain of wheat.” 
