Hepatitis C Virus (HCV) RNA screening and sequencing using dry plasma spots

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dc.contributor.authorPhillips, Richard Odame
dc.contributor.authorGeretti, Anna Maria
dc.contributor.authorKing, Simon
dc.contributor.authorAdjei-Asante, Kwabena
dc.contributor.authorAppiah, Lambert Tetteh
dc.contributor.authoret. al
dc.date.accessioned2020-01-13T09:33:25Z
dc.date.accessioned2023-04-19T01:44:30Z
dc.date.available2020-01-13T09:33:25Z
dc.date.available2023-04-19T01:44:30Z
dc.date.issued2017-10
dc.descriptionAn article published by Elsevier B.V.en_US
dc.description.abstractBackground: HCV RNA screening of large sample repositories provides data on HCV epidemic patterns that may help guide control policies. In resource-limited settings, shipment of frozen samples to molecular laboratory facilities and testing of individual samples may be prohibitively expensive. Objective: Our aim was to detect and sequence HCV RNA in a large HIV-positive cohort from Kumasi, Ghana, using pooled and individual dried plasma spots (DPS) produced from samples stored at −80 °C. Study design: In the validation phase, replicate DPS were prepared with six dilutions (500–10,000 IU/ml) of the 4th International Standard for HCV and tested in three independent experiments. In the testing phase, DPS prepared with plasma samples from 875 HIV-positive subjects were pooled for screening, followed by testing of individual DPS of positive pools. Input from individual DPS was two 6 mm punches; pools comprised two punches from each of five DPS. Genotypes were determined by Sanger sequencing of HCV core and NS5B. Results: With the dilution series, sensitivity of HCV RNA detection was ≥2500 IU/ml. Replicate DPS gave intraassay and inter-assay coefficients of variation ≤1.4%. With the stored samples, HCV RNA was detected in 5/175 DPS pools and in one DPS from each positive pool, yielding a HCV RNA prevalence of 5/875 (0.57%; 95% confidence interval 0.07-1.07%). The five samples were sequenced as HCV genotypes 2l and 2r. Discussion: DPS allowed reproducible HCV RNA detection, and pooling effectively contained the cost and labour of screening a previously untested, low-prevalence cohort. DPS were also suitable for HCV sequencing.en_US
dc.description.sponsorshipKNUSTen_US
dc.identifier.citationElsevier B.V. 97 (2017) 18–21 19en_US
dc.identifier.urihttps://ir.knust.edu.gh/handle/123456789/11907
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.subjectHCV RNAen_US
dc.subjectSequencingen_US
dc.subjectDried plasma spotsen_US
dc.subjectSub-Saharan Africaen_US
dc.subjectEpidemiologyen_US
dc.titleHepatitis C Virus (HCV) RNA screening and sequencing using dry plasma spotsen_US
dc.typeArticleen_US
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