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Malaria Research and Treatment
Volume 2010, Article ID 858427, 6 pages
http://dx.doi.org/10.4061/2010/858427
Research Article

Accuracy of an Immunochromatographic Diagnostic Test (ICT Malaria Combo Cassette Test) Compared to Microscopy among under Five-Year-Old Children when Diagnosing Malaria in Equatorial Guinea

1National Centre of Tropical Medicine, Institute of Health Carlos III, 28029 Madrid, Spain
2National Centre of Endemic Diseases Control, Institute of Health Carlos III, Malabo, Equatorial Guinea
3Research Unit, Spanish Society of Rheumatology, 28001 Madrid, Spain
4National Malaria Control Programme, Ministry of Health and Social Welfare, Malabo, Equatorial Guinea

Received 25 January 2010; Accepted 10 June 2010

Academic Editor: Neena Valecha

Copyright © 2010 José-Luis Portero et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Conventional malaria diagnosis based on microscopy raises serious difficulties in weak health systems. Cost-effective and sensitive rapid diagnostic tests have been recently proposed as alternatives to microscopy. In Equatorial Guinea, a study was conducted to assess the reliability of a rapid diagnostic test compared to microscopy. The study was designed in accordance with the directives of the Standards for Reporting Diagnostic Accuracy Initiative (STARD). Peripheral thick and thin films for the microscopy diagnosis and a rapid immunochromatographic test (ICT Malaria Combo Cassette Test) were performed on under five-year-old children with malaria suspicion. The ICT test detected Plasmodium spp. infection with a sensitivity of 81.5% and a specificity of 81.9% while P. falciparum diagnosis occurred with a sensitivity of 69.7% and a specificity of 73.7%. The sensitivity of the ICT test increased with higher parasitemias. The general results showed little concordance between the ICT test and microscopy (kappa = 0.28, se: 0.04). In Equatorial Guinea, the ICT Malaria Combo Cassette Test has proven to be an acceptable test to detect high P. falciparum parasitemias. However, the decrease of sensitivity at medium and low parasitemias hampers that ICT can replace properly performed microscopy at present in the diagnosis of malaria in children.