CD4 and malaria: The objective of the study was to evaluate the performance of a commercially available MRDT (based on P. falciparum histidine-rich protein type-2 and Plasmodium lactate dehydrogenase), the Standard Diagnostics (SD) Bioline MRDT, compared to the gold standard, microscopy, in the diagnosis of malaria among HIV-positive participants with respect to malaria parasite density, CD4+ T cells count, cotrimoxazole prophylaxis use, anti-retroviral treatment (ART) status and occurrence of fever.