Selected monographs.

  • New Sydenham Society.
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: Selected monographs. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    0*003; their contour marked by a very fine line; the body transparent except in the centre, where there exists a spot formed of blackish granules; often on the concave side is seen a fine line uniting the two extremities of the half moon. 2nd. Spherical transparent bodies, of the mean diameter of a red globule containing pigment granules, which in repose often describe a very regular circle, and when in movement are actively agitated. Sometimes at the periphery of these elements are observed very fine filaments, which are apparently inserted into them, are animated by very rapid movements, and have the free extremity slightly swollen. Such filaments may be detached, and move freely in the midst of the red globules. 3rdly. Spherical elements, of irregular form, transparent and finely granular, diameter 0'008—O'OIO mm., containing pig- ment granules disposed very irregularly at the periphery, some- times collected in the centre, sometimes at a point of the periphery itself. There are also found in the blood, according to Laveran, spherical transparent elements, containing movable and im- movable pigment granules, elements of smaller diameter than the preceding, isolated or united, and adhering to the red discs and the leucocytes. Laveran believes that these pigmented bodies represent different stages of an elementary parasite, which he is unable to pronounce to be animal or vegetable, which exists in an encysted condition, and in its perfect form becomes free as a movable filament. Besides these, Laveran has observed in the blood shining, round, movable bodies, without specific character; melaniferous leucocytes, red globules which appear perforated in one or more points, inclosing pigmentary granulations, free pigment granules resulting from the destruction of the parasitic elements. Kichard* confirms fully the observations of Laveran, but instead of holding, like this observer, that the small pigmented forms are found adhering to the red corpuscles, he maintains that they, existing within the latter, where they are developed, grow and issue from them in a perfect state. He describes these pigmented parasites in various stages of development in the red globules, when arrived at a state' of maturity perforating * Sur leparasite de la Malaria. Comptea rendus (1882). 5