Sensitivity and specificity of malaria rapid diagnostic test (mRDT CareStatTM) compared with microscopy amongst under five children attending a primary care clinic in southern Nigeria

• Main Authors: Oluwagbenga Ogunfowokan (Author), Bamidele A. Ogunfowokan (Author), Anthony I. Nwajei (Author)
• Format: Book
• Published: AOSIS, 2020-06-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.
• Notes: 2071-2928; 2071-2936; 10.4102/phcfm.v12i1.2212
• Keywords: family medicine; primary care; education; mrdt; parasite density; sensitivity; specificity; Medicine; R; Public aspects of medicine; RA1-1270
• Source: African Journal of Primary Health Care & Family Medicine, Vol 12, Iss 1, Pp e1-e8 (2020)

Background: Malaria diagnosis using microscopy is currently the gold standard. However, malaria rapid diagnostic tests (mRDTs) were developed to simplify the diagnosis in regions without access to functional microscopy. Aim: The objective of this study was to compare the diagnostic accuracy of mRDT CareStatTM with microscopy. Setting: This study was conducted in the paediatric primary care clinic of the Federal Medical Centre, Asaba, Nigeria. Methods: A cross-sectional study for diagnostic accuracy was conducted from May 2016 to October 2016. Ninety-eight participants were involved to obtain a precision of 5%, sensitivity of mRDT CareStatTM of 95% from published work and 95% level of confidence after adjusting for 20% non-response rate or missing data. Consecutive participants were tested using both microscopy and mRDT. The results were analysed using EPI Info Version 7. Results: A total of 98 children aged 3-59 months were enrolled. Malaria prevalence was found to be 53% (95% confidence interval [CI] = 46% - 60%), whilst sensitivity and specificity were 29% (95% CI = 20% - 38%) and 89% (95% CI = 83% - 95%), respectively. The positive and negative predictive values were 75% (95% CI = 66.4% - 83.6%) and 53% (95% CI = 46% - 60%), respectively. Conclusion: Agreement between malaria parasitaemia using microscopy and mRDT positivity increased with increase in the parasite density. The mRDT might be negative when malaria parasite density using microscopy is low.