Confocal laser scanning immunofluorescence of P. vivax infected reticulocytes. Enriched P. vivax infected reticulocytes were double labelled with antisera to MSP-1 (detected using a CyTM3-conjugated secondary antibody) and affinity purified VIR C antibodies from patient 40 (detected using a FITC-conjugated secondary antibody). Left panel from left to right: anti-MSP-1; human anti-virC; DIC image; Hoe33342 stained nuclei; overlay; control using serum from a naive human as the primary antiserum. A scale bar is indicated.