Malaria : its cause, prevention and cure / by W.E. Deeks.

  • Deeks, W. E. (William Edgar), 1866-1931
Date:
[1925?]
Catalogue details

Licence: Public Domain Mark

Credit: Malaria : its cause, prevention and cure / by W.E. Deeks. Source: Wellcome Collection.

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    HEART Vv VENTRAL FOOD RESERVOIR , FEMAL F. Auoph eles maculipennis MEIGEN PATTUOINAL MUSCLES OF THORAX LEFT DORSAL FOOD RF& POSTERIOR(CESOPHAGEAL) THE ANATOMY OF THE MALARIAL MOSQUITO = ~ ANTERIOR(CLYPEAL) PUMP ANTENNA PALPS elivary Ducr SALIVARY GLAND: POINTS OF - ‘LABRUM kk MY POPHARYNX IMAXILLE THORACIC GANGLION EXCRETORY TUBULES PODERMIS(TRUECELLULAR SKIN) EXO-SKELETON (CHITIN) [MANDIBLES LABIUM Fic. A. PHOTOGRAPH OF MODEL IN AMERICAN MUSEUM OF NATURAL HISTORY mit malaria. The adult form (wmago) of most species hibernates, and thus lives through the winter. The devel- opmental phase of the parasite in man is called the ‘‘nonsexual cycle” ; that in the mosquito, “the sexual cycle.” As stated above, there are three distinct species of the parasite, which differ in their microscopical appear- ance and also in their life-histories. These variations are partly responsi- ble for the difference in the clinical symptoms resulting from malaria in- fection. Tertran Marvaria (BEnien) The form of fever known as ter- tian malaria is caused by Plasmodium vivax. This organism requires 48 hours to mature in the red cell, when it sporulates, liberating its toxins and spores, which vary in number from 16 to 24. As the tertian or- ganism approaches maturity in the red cell, it is larger than that of either of the other species. The normal dimensions of the red cell in which it develops become enlarged, and in consequence it is frequently caught in the minute blood vessels (capillaries) of the viscera, where sporulation generally takes place. The sporulating forms are therefore seldom seen in the peripheral blood (that obtained from the finger or ear) but must be sought for in the spleen, liver or other deep-seated viscera. QuarTaAN Mataria (BEnicn) The quartan type of malaria fever is caused by Plasmodium ma-
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