Figure 6From: Dried blood spots as a source of anti-malarial antibodies for epidemiological studiesAppearance of fresh and degraded blood spots. Eluates from fresh blood spots (a) and spots stored for approximately 1 year at ambient temperature and humidity (b) are shown. In (a), complete elution of haemoglobin has resulted in a white filter paper disc in a red solution. In (b), little haemoglobin has been eluted so that the disc remains dark red and the solution pale.Back to article page