TABLE 1.

Results of routine blood samples examined for malaria by microscopy compared to OptiMAL rapid dipstick testa

No. of samples and species present by microscopyNo. OptiMAL positiveSensitivity (%)
Plasmodium falciparum
    54 with parasitemia of >1% (50,000 parasites/μl)54100
    103 with parasitemia of 0.1–1% (5,000 parasites/μl)103100
    72 with parasitemia of 0.01–0.09% (500 parasites/μl)72100
    32 with parasitemia of 0.001–0.009% (50 parasites/μl)2372
    11 with parasitemia of 0.0001–0.0009% (5 parasites/μl)873
    5 with gametocytes only480
Plasmodium vivax
    110 (all asexual stages)10596
Plasmodium malariae
    17 (late trophozoites)847
Negative
    214 (no malaria parasites found)0100
  • a Adapted from reference 49 with permission of the publisher.