Which Plasmodium species invades older red blood cells and characteristically forms a band form in trophozoites?

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Multiple Choice

Which Plasmodium species invades older red blood cells and characteristically forms a band form in trophozoites?

The key idea is how each parasite favors different red blood cell ages and shows characteristic smear features. Plasmodium malariae specifically invades older, aged erythrocytes and, as trophozoites develop, forms a thin band that stretches across the red blood cell. That band-like trophozoite is a distinctive diagnostic clue on blood smears for this species. In contrast, other parasites have different patterns: vivax targets young red cells (reticulocytes) and enlarges the cell with Schuffner stippling, falciparum infects cells of all ages and often shows multiple small rings with banana-shaped gametocytes, and Babesia is not a Plasmodium but can produce Maltese-cross formations.

The key idea is how each parasite favors different red blood cell ages and shows characteristic smear features. Plasmodium malariae specifically invades older, aged erythrocytes and, as trophozoites develop, forms a thin band that stretches across the red blood cell. That band-like trophozoite is a distinctive diagnostic clue on blood smears for this species. In contrast, other parasites have different patterns: vivax targets young red cells (reticulocytes) and enlarges the cell with Schuffner stippling, falciparum infects cells of all ages and often shows multiple small rings with banana-shaped gametocytes, and Babesia is not a Plasmodium but can produce Maltese-cross formations.

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