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. 2008 Nov;14(11):1750–1752. doi: 10.3201/eid1411.080840

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Binding specificity of different anti–Plasmodium lactate dehydrogenase (pLDH) antibodies. A) Shown are the reactivities of the indicated monoclonal antibodies (MAbs) to the LDH from 7 Plasmodium spp. Reactivity was determined by using an immunocapture assay as previously described (9). B) Example of an immunodipstick assay that detects P. knowlesi. An immunochromatographic strip assay containing the indicated antibodies was allowed to wick lysed blood infected with P. vivax, P. falciparum, P. knowlesi, P. ovale, or P. malariae. Blood was wicked in the presence of colloidal gold conjugated to antibody 6C9, which binds all pLDH isoforms. P. vivax LDH is immobilized only by 11D9 and 13H11, and P. falciparum LDH was only immobilized by 17E4. P. knowlesi LDH was immobilized by 11D9 and 13H11 antibodies and also by 17E4. C) An immunochromatographic strip assay containing the indicated antibodies was allowed to wick lysed blood infected with P. vivax, P. cynomolgi, P. inui, and P. knowlesi. Blood was wicked in the presence of colloidal gold conjugated to antibody 6C9, which binds all pLDH isoforms. Both P. cynomolgi and P. inui show the same epitope profile as P. vivax.