Dried Blood Spots Versus Plasma for the Quantification of HIV-1 RNA Using the Manual (PCR-ELISA) Amplicor Monitor HIV-1 Version 1.5 Assay in Yaounde, Cameroon

• Published in: Journal of the International Association of Physicians in AIDS Care (Chicago, Ill. : 2002) Ill. : 2002), 2009-05, Vol.8 (3), p.181-184
• Main Authors: Ikomey, G.M., Atashili, J., Okomo-Assoumou, M.C., Mesembe, M., Ndumbe, P.M.
• Format: Article
• Language: English
• Subjects: Adolescent; Adult; Blood; Blood - virology; Cameroon; Enzyme-Linked Immunosorbent Assay; Female; HIV; HIV Infections - blood; HIV Infections - virology; HIV-1 - genetics; HIV-1 - isolation & purification; Human immunodeficiency virus; Human immunodeficiency virus 1; Humans; Male; Middle Aged; Plasma - virology; Polymerase Chain Reaction; RNA, Viral - blood; Specimen Handling - methods; Viral Load - methods; Young Adult
• ISSN: 1545-1097; 2325-9574; 1557-0886; 2325-9582
• DOI: 10.1177/1545109709333111

Objectives: Considering the recent accrued need for viral load quantification in resource-limited settings, this study evaluated the use of dried blood spots (DBS) compared to plasma as a means of sample collection and storage for HIV-1 RNA quantification using a non-automated assay. Methods: Venous blood was collected from 60 consenting HIV-1-positive patients, plasma separated within 4 hours, and stored at -20°C. Venous blood, 50 μL, was blotted on 4 designated areas of Whatman filter paper and air-dried at room temperature for 2 hours. Results: There was a strong statistically significant correlation between HIV-1 RNA viral load using plasma and DBS (r = .955, P < .001). On average plasma viral loads were only slightly higher than DBS viral loads (mean difference: 0.06 log10 copies/mL). Conclusion: Even when using an entirely manual HIV-quantification assay, DBS may provide a reliable, cost-effective method for sample collection and storage for HIV-1 RNA quantification in resource-limited settings.