Plasmodium ovale

Plasmodium ovale

Disease / Pathogenesis

Plasmodium ovale

Location in the Host

Plasmodium ovale

Geographic Distribution

Plasmodium ovale

Life Cycle

Plasmodium ovale

Morphology & Diagnosis

Plasmodium ovale infected red blood cells will characteristically have ragged edges (fimbriated). Because red blood cells infected are young they can be slightly enlarged (up to 1 1/4x) in size or normal in size. The infected red blood cells, much like those of Plasmodium vivax, can have Schuffner’s dots visible in them when stained with Giemsa stain.

Trophozoites in the red blood cells tend to be compact while ring forms are described as having a sturdy cytoplasm and a prominent chromatin dot.

Schizonts will have between 6-14 merozoites present whereas Plasmodium vivax will have between 12-24 merozoites.

Images

Plasmodium ovale illustrating some characteristic stages of development. Note the ragged edges of the infected cells that are characteristic of Plasmodium ovale – photos by W. Vientos