Page:Tropical Diseases.djvu/110

78

TABULAR STATEMENT OF THE CHARACTER

(Modified from

	Duration of development	Movement	Hæmozoin	Maximum size	Form of segmentation
1. Quartan parasite, Plasmodium malariæ	Seventy-two hours	Slight movement in the immature forms	Coarse grains; little or no movement	The size of a red blood-corpuscle	Daisy form; the single spores roughish, with distinct nucleolus
2. Tertian parasite, Plasmodium vivax	Forty-eight hours; or less in anticipating types	Active amœboid movement in the immature and also in the middle-aged forms	Finer granules in immature forms; often in the larger actively swarming	Size of a red blood-corpuscle; sometimes even larger	Sunflower or grape-like; single spores small, round; nucleolus rarely seen
3. Pigmented quotidian parasite, Laverania præcox	Twenty-four hours	In the unpigmented immature stage very actively amœboid; less active when hæmozoin accumulates	Very fine; later coalesces in one or two clumps; does not swarm	1/4-1/3 the size of a red blood-corpuscle	Irregularly formed heap
4. Unpigmented quotidian parasite, Laverania immaculata	Twenty-four hours or less	Very active amœboid movement	None	1/5-1/4 the size of a red blood-corpuscle	Star-shaped, or in irregular heaps
5. Subtertian parasite. Laveraniamalariæ (Plasmodium falciparum)	Forty-eight hours or less	Active; the movement remains present in the pigmented stage	Fine; often shows oscillatory movement	1/2-2/3 the size of a red blood-corpuscle	Irregular heaps