Relapse of <i>Plasmodium vivax</i> and <i>Plasmodium ovale</i> Malaria With and Without Primaquine Treatment in a Nonendemic Area

Abstract

The risk of relapse was considerably lower in P. ovale than in P. vivax infections indicating different relapsing features between the two species. Primaquine was effective in preventing P. vivax relapse. In P. ovale, relapse episodes were few, and the supportive evidence for primaquine remains limited.