The practical study of malaria : and other blood parasites / by J.W.W. Stephens and S.R. Christophers.

Date:
1904
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Licence: In copyright

Credit: The practical study of malaria : and other blood parasites / by J.W.W. Stephens and S.R. Christophers. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    Staining Reactions of Gametes (Malignant Tertian) Argutinsky,1 who has lately studied this question of stippling by means of a modification of the Romanowsky stain comes to the following conclusions. By his method he is unable to obtain stippling of the young asexual forms, which we have ourselves often obtained, and which Maurer also confirms, but he obtains stippling of the red cell infected by the adult gametes (crescents). These forms were also seen by us in West Africa while using a very active haematein stain ;2 but they are certainly not shown by the usual Roman- owsky methods in use. Argutinsky’s results depend upon his fixative acetic-osmic vapour; while then he differs in not having obtained stip- pling of cells containing ordinary ring forms, yet his criteria for distinguishing the gametes agree with those generally received. With regard to the stippling in the mikrogametocyte (male) there is a single peripheral row of finer and less intensely stained dots than in the red cell surrounding the makrogamete. The rim of red cell surrounding the parasite is also narrower in the case of the male. Quartan Gametes.—Presumably similar differ- ences exist as in other forms of tire parasite, but they have not yet been described, and, in fact, gametes are often very rare in quartan cases. Note.—Gametes (crescents) may be but rarely found in the blood of Europeans in the tropics (West Africa). I C.fur Backteriologie, ltd. xxxiv, S. 144. 2 Reports to the Malarial Committee. Harrison & Sons. Series iii, p. 8.