Which description would be associated with a life cycle stage of Plasmodium malariae?

Which description would be associated with a life cycle stage of Plasmodium malariae?

• A. 6 merozoites in a daisy-petal arrangement in a normal-sized red blood cell
• B. Banana-shaped organism in a normal-sized red blood cell
• C. Compact organism with dark pigment in an enlarged red blood cell with fimbribrated edges
• D. 18 merozoites in an enlarged red blood cell with pink dots in the cytoplasm

Answer: (A)

Plasmodium malariae is identified by the schizont stage inside a red blood cell that contains a small, fixed number of merozoites arranged in a circular rosette, giving a daisy-petal appearance. The red blood cell remains normal in size, which helps distinguish it from species that enlarge RBCs. This distinctive six-merozite rosette within a normal-sized RBC is characteristic of P. malariae schizonts. In contrast, other descriptions reflect features of different malaria species or life stages—for example, banana-shaped forms are mature gametocytes of P. falciparum, and enlarged red blood cells with different trophozoite features point to other species like P. vivax or P. ovale.

Plasmodium malariae is identified by the schizont stage inside a red blood cell that contains a small, fixed number of merozoites arranged in a circular rosette, giving a daisy-petal appearance. The red blood cell remains normal in size, which helps distinguish it from species that enlarge RBCs. This distinctive six-merozite rosette within a normal-sized RBC is characteristic of P. malariae schizonts. In contrast, other descriptions reflect features of different malaria species or life stages—for example, banana-shaped forms are mature gametocytes of P. falciparum, and enlarged red blood cells with different trophozoite features point to other species like P. vivax or P. ovale.