Double chromatin dot forms

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Description

Early or late trophozoites where the chromatin dot has two separate masses - a double dot that is sometimes said to resemble a signet ring, although this really only applies for typical ring forms where dots are relatively close together.

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Note how the chromatin dot of the ring form is divided into two purple masses

Species significance

Most often this appearance is considered to be a feature of P.falciparum and can be helpful to indicate this species; however the form is not specific and may occur in any species.

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Additional images:

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  A

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  B

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  C

Malaria double chromatin dot forms in: late trophozoite of P.ovale (A) an early trophozoite of P.vivax (B) amd eraly trophozoite of P.knowlesi (C)

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