Additional burden of asymptomatic and sub-patent malaria infections during low transmission season in forested tribal villages in Chhattisgarh, India

The burden of sub-patent malaria is difficult to recognize in low endemic areas due to limitation of diagnostic tools, and techniques. Polymerase chain reaction (PCR), a molecular based technique, is one of the key methods for detection of low parasite density infections. The study objective was to...

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Veröffentlicht in:Malaria journal 2017-08, Vol.16 (1), p.320-320, Article 320
Hauptverfasser: Chourasia, Mehul Kumar, Raghavendra, Kamaraju, Bhatt, Rajendra M, Swain, Dipak Kumar, Meshram, Hemraj M, Meshram, Jayant K, Suman, Shrity, Dubey, Vinita, Singh, Gyanendra, Prasad, Kona Madhavinadha, Kleinschmidt, Immo
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Sprache:eng
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Zusammenfassung:The burden of sub-patent malaria is difficult to recognize in low endemic areas due to limitation of diagnostic tools, and techniques. Polymerase chain reaction (PCR), a molecular based technique, is one of the key methods for detection of low parasite density infections. The study objective was to assess the additional burden of asymptomatic and sub-patent malaria infection among tribal populations inhabiting three endemic villages in Keshkal sub-district, Chhattisgarh, India. A cross-sectional survey was conducted in March-June 2016, during the low transmission season, to measure and compare prevalence of malaria infection using three diagnostics: rapid diagnostic test, microscopy and nested-PCR. Out of 437 individuals enrolled in the study, 103 (23.6%) were malaria positive by PCR and/or microscopy of whom 89.3% were Plasmodium falciparum cases, 77.7% were afebrile and 35.9% had sub-patent infections. A substantial number of asymptomatic and sub-patent malaria infections were identified in the survey. Hence, strategies for identifying and reducing the hidden burden of asymptomatic and sub-patent infections should focus on forest rural tribal areas using more sensitive molecular diagnostic methods to curtail malaria transmission.
ISSN:1475-2875
1475-2875
DOI:10.1186/s12936-017-1968-8