Detection of histidine rich protein 2 and panmalarial ICT Malaria Pf/Pv test antigens after chloroquine treatment of uncomplicated falciparum malaria does not reliably predict treatment outcome in eastern Indonesia.

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ID: 81106
2001
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Abstract
In regions with drug-resistant malaria, the ability to rapidly detect or predict treatment failure (TF) soon after a course of standard therapy for Plasmodium falciparum malaria would facilitate the prompt institution of second-line therapy. We thus evaluated longitudinally the ability of the ICT Malaria Pf/Pv immunochromatographic test to predict treatment outcome. Sixty-six Sumbanese Indonesians with uncomplicated falciparum malaria were treated with chloroquine and followed for 28 days by use of 1997 World Health Organization criteria for assessment of therapeutic efficacy of antimalarial drugs. The ICT Pf/Pv testing could be compared with microscopy in approximately half of the patients on each day of follow-up. Although strongly positive histidine rich protein 2 (HRP2) line intensities (equal to or greater than the control band) in convalescence were highly predictive of TF, any degree of positivity for the HRP2 and panmalarial antigens in convalescence was only moderately predictive of TE Positive predictive values of the HRP2 and panmalarial antigens for TF were 76.9% and 87.0%, respectively, on Day 3, 82.4% and 87.5% on Day 7, and 78.9% and 78.9% on Day 14. Negative HRP2 and panmalarial antigen results in convalescence were even less predictive of an adequate clinical response, and false-negative HRP2 and panmalarial antigen test results were found in one-sixth (6 of 37) of recrudescent infections diagnosed by microscopy among patients with late treatment failure. To reliably predict treatment outcome with rapid antigen tests, further development appears necessary to improve sensitivity for viable asexual parasites while avoiding detection of both gametocytes and persistent antigen in convalescence.
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Authors Tjitra, E;Suprianto, S;Dyer, M E;Currie, B J;Anstey, N M;
Journal The American journal of tropical medicine and hygiene
Year 2001
DOI
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URL URL not found
Keywords
Fever malaria rdt

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