Utility of host markers detected in Quantiferon supernatants for the diagnosis of tuberculosis in children in a high-burden setting

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dc.contributor.authorChegou, Novel N.en_ZA
dc.contributor.authorDetjen, Anne K.en_ZA
dc.contributor.authorThiart, Lanien_ZA
dc.contributor.authorWalters, Elisabettaen_ZA
dc.contributor.authorMandalakas, Anna M.en_ZA
dc.contributor.authorHesseling, Anneke C.en_ZA
dc.contributor.authorWalzl, Gerharden_ZA
dc.date.accessioned2014-07-07T12:29:48Z
dc.date.available2014-07-07T12:29:48Z
dc.date.issued2013-05-15
dc.descriptionCITATION: Chegou, N. N. et al. 2013. Utility of host markers detected in Quantiferon supernatants for the diagnosis of tuberculosis in children in a high-burden setting. PLoS ONE, 8(5):e64226, doi:10.1371/journal.pone.0064226.en_ZA
dc.descriptionThe original publication is available at http://journals.plos.org/plosoneen_ZA
dc.description.abstractBackground: The diagnosis of childhood tuberculosis (TB) disease remains a challenge especially in young and HIV-infected children. Recent studies have identified potential host markers which, when measured in Quantiferon (QFT-IT) supernatants, show promise in discriminating between Mycobacterium tuberculosis (M.tb) infection states. In this study, the utility of such markers was investigated in children screened for TB in a setting with high TB incidence. Methodology and Principal Findings: 76 children (29% HIV-infected) with or without active TB provided blood specimens collected directly into QFT-IT tubes. After overnight incubation, culture supernatants were harvested, aliquoted and frozen for future immunological research purposes. Subsequently, the levels of 12 host markers previously identified as potential TB diagnostic markers were evaluated in these supernatants for their ability to discriminate between M.tb infection and disease states using the Luminex platform. Of the 76 children included, 19 (25%) had culture confirmed TB disease; 26 (46%) of the 57 without TB had positive markers of M.tb infection defined by a positive QFT-IT test. The potentially most useful analytes for diagnosing TB disease included IFN-a2, IL-1Ra, sCD40L and VEGF and the most useful markers for discriminating between QFT-IT positive children as TB or latent infection included IL-1Ra, IP-10 and VEGF. When markers were used in combinations of four, 84% of all children were accurately classified into their respective groups (TB disease or no TB), after leave-one-out cross validation. Conclusions: Measurement of the levels of IFN-a2, IL-1Ra, sCD40L, IP-10 and VEGF in QFT-IT supernatants may be a useful method for diagnosing TB disease and differentiating between active TB disease and M.tb infection in children. Our observations warrant further investigation in larger well-characterized clinical cohorts.en_ZA
dc.description.urihttp://journals.plos.org/plosone/article?id=10.1371/journal.pone.0064226
dc.description.versionPublisher's versionen_ZA
dc.format.extent11 pages : illustrationsen_ZA
dc.identifier.citationChegou, N. N. et al. 2013. Utility of host markers detected in Quantiferon supernatants for the diagnosis of tuberculosis in children in a high-burden setting. PLoS ONE, 8(5):e64226, doi:10.1371/journal.pone.0064226.en_ZA
dc.identifier.issn1932-6203 (online)
dc.identifier.issn1932-6203 (print)
dc.identifier.otherdoi:10.1371/journal.pone.0064226
dc.identifier.urihttp://hdl.handle.net/10019.1/94320
dc.language.isoenen_ZA
dc.publisherPLoSen_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectQuantiferon supernatantsen_ZA
dc.subjectTuberculosis in children -- Diagnosis -- South Africaen_ZA
dc.subjectHIV-positive childrenen_ZA
dc.subjectTuberculosis -- Diagnosis -- Toolsen_ZA
dc.titleUtility of host markers detected in Quantiferon supernatants for the diagnosis of tuberculosis in children in a high-burden settingen_ZA
dc.typeArticleen_ZA
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