Older developing stages (trophs, schizonts) of Plasmodium knowlesi resemble those of which species?

The older developing stages (trophozoites and schizonts) of Plasmodium knowlesi closely resemble those of Plasmodium malariae, making this choice the correct answer. Both species exhibit similar morphological characteristics during their erythrocytic phases, particularly in the appearance of their trophozoites and the arrangement of their schizonts.

Plasmodium malariae has distinct features such as relatively smaller and less prominent trophozoites, while the schizonts typically contain fewer merozoites compared to other Plasmodium species. The resemblance in morphology between Plasmodium knowlesi and Plasmodium malariae can lead to challenges in diagnosis without careful microscopic examination or molecular testing.

On the other hand, Plasmodium ovale, Plasmodium falciparum, and Plasmodium vivax have their own unique characteristics. Plasmodium ovale can be distinguished by its elongate forms and specific developmental stages that do not closely match those of P. knowlesi. Plasmodium falciparum notably has a distinct "band" form and tends to produce a higher number of merozoites in its schizonts, differentiating it from the other species. Finally