Dataset Information

An Ultra-Sensitive Technique: Using Pv-mtCOX1 qPCR to Detect Early Recurrences of Plasmodium vivax in Patients in the Brazilian Amazon.

ABSTRACT:

Background

Early recurrence of Plasmodium vivax is a challenge for malaria control in the field, particularly because this species is associated with lower parasitemia, which hinders diagnosis and monitoring through blood smear testing. Early recurrences, defined as the persistence of parasites in the peripheral blood despite adequate drug dosages, may arise from resistance to chloroquine. The objective of the study was to estimate early recurrence of P. vivax in the Brazilian Amazon by using a highly-sensitive detection method, in this case, PCR.

Methods

An ultra-sensitive qPCR that targeted mitochondrial DNA was used to compare a standard qPCR that targeted 18S rDNA to detect early recurrence of P. vivax in very low densities in samples from patients treated with chloroquine.

Results

Out of a total of 312 cases, 29 samples (9.3%) were characterized as recurrences, from which 3.2% (10/312) were only detected through ultra-sensitive qPCR testing.

Conclusions

Studies that report the detection of P. vivax early recurrences using light microscopy may severely underestimate their true incidence.

SUBMITTER: Barbosa LRA

PROVIDER: S-EPMC7823330 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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An Ultra-Sensitive Technique: Using <i>Pv</i>-mtCOX1 qPCR to Detect Early Recurrences of <i>Plasmodium vivax</i> in Patients in the Brazilian Amazon.

Barbosa Laila R A LRA da Silva Emanuelle L EL de Almeida Anne C G ACG Salazar Yanka E A R YEAR Siqueira André M AM Alecrim Maria das Graças Costa MDGC Vieira José Luiz Fernandes JLF Bassat Quique Q de Lacerda Marcus V G MVG Monteiro Wuelton M WM Melo Gisely C GC

Pathogens (Basel, Switzerland) 20201230 1

<h4>Background</h4>Early recurrence of <i>Plasmodium vivax</i> is a challenge for malaria control in the field, particularly because this species is associated with lower parasitemia, which hinders diagnosis and monitoring through blood smear testing. Early recurrences, defined as the persistence of parasites in the peripheral blood despite adequate drug dosages, may arise from resistance to chloroquine. The objective of the study was to estimate early recurrence of <i>P. vivax</i> in the Brazil ...[more]

PMID: 33396824

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