Page:Tropical Diseases.djvu/110

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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

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