A laboratory test considered the gold standard for diagnosing malaria involves preparing two blood smears on a glass slide: a thick blood smear for sensitive detection of the parasite, and a thin blood smear to accurately identify the Plasmodium species (e.g., Plasmodium falciparum, Plasmodium vivax, Plasmodium ovale, Plasmodium malariae) and its life stage within red blood cells. The slides are then examined microscopically after staining with Giemsa stain.