The diagnostics and treatment of tropical diseases / by E.R. Stitt.

  • Stitt, E. R. (Edward Rhodes), 1867-1948.
Date:
1914
Catalogue details

Licence: In copyright

Credit: The diagnostics and treatment of tropical diseases / by E.R. Stitt. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    IO The gametes, or sexual parasites, show a thicker blue ring and have the chromatin dot in the center of the ring. The pigmentation of the half grown gametes is more marked than that of schizonts of equal size. The shape of the gametes is not amoeboid, as is that of the 24 to 36 hour old schizont, but round or oval. The full grown gametes have the pigment distributed and the chromatin in a single aggrega- FiG. 5.—Plasmodium vivax. Mature schizont and merocyte. Found in the blood just before and at onset of chill. X 2200. (MacNeal after Doflein.) tion—just the opposite of non sexual parasites. The male gamete stains a grayish green and has a very large amount of chromatin, usually centrally placed. The fe- male gamete stains a pure blue, has only about 1/10 as much chromatin as plasma, with the chromatin often placed at one side. The pigment of the female gamete is dark brown while that of the male is yellowish brown. Plasmodium Malariae. In fresh preparations the young quartan schizont has only slight amoeboid movement and, as development proceeds, the rather dark pIG 6_—Plasmodium malariae. (Quartan.) Development of nonsexual parasite in blood of man. X 2200. (From MacNeal after Doflein.) brown, coarse pigment tends to arrange itself peripherally about the band shaped or oval parasite.