Plasmodium vivax 2 17.jpg

Taxonomy: f. Plasmodidae
Animal: Plasmodium vivax 2 17.jpg
Sites: Blood
Comment:
Plasmodium vivax in thin film - note double ring on edge. This is more common for P.falciparum but some P.vivax ring forms can have 2 chromatin dots. In cases like this, further examinations should be performed to find more characteristic forms of the parasite before making a diagnosis. The best chance to detect parasites is several hours after the height of the paroxysm. Thorough examination of thick and thin films (at least 200 fields) are essential before ruling out a malaria infection and final diagnosis should be based on the examination of the thin films based on the observation of different forms of the parasite. Repeat blood collections may be necessary over a 36 hour period to confirm diagnosis. Accurate species identification is essential for correct treatment to be administered. (See parasitology textbooks such as Garcia and Bruckner 1997 for details)

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