Combined use of Quantiferon and HBHA-based IGRA supports tuberculosis diagnosis and therapy management in children

Michela Sali, Ivana Palucci, Maurizio Sanguinetti, Piero Valentini, Giovanni Delogu, Danilo Buonsenso, Flavio De Maio, Teresa Chiacchio, Delia Goletti

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Objectives: Interferon-γ release assays (IGRA) are designed for diagnosis of tuberculosis (TB) infection, and do not discriminate latent TB infection (LTBI) from active TB. Heparin-binding hemagglutinin antigen (HBHA) emerged as a promising antigen for TB diagnosis when used in IGRA format. Aim of this study was to prospectively evaluate the performance of an HBHA-based IGRA to support TB diagnosis and TB therapy monitoring in children with TB infection or active TB disease. Methods: Following clinical, microbiological and radiological assessment, children (0–14 years old) were tested by the QuantiFERON TB-Gold In tube (QFT) assay and an aliquot of whole-blood was stimulated with HBHA and IFNγ evaluated only in QFT-positive subjects. Results: Among the 550 children tested, 486 (88.4%) scored negative and 64 (11.6%) positive. None of the QFT-negative had active TB. Among the QFT-positive, 45 were with LTBI and 19 active TB. HBHA-IGRA scored positive in 41/45 children (91.1%) with LTBI and in 6/19 active TB children (31.6%) at diagnosis (p = 0.001); remarkably, 5 of these 6 children with active TB scoring HBHA-positive were asymptomatic. Moreover, following TB-specific therapy, most of the non-HBHA-responding children, gained an HBHA-positive response. Conclusions: HBHA-based IGRA is a useful support in TB diagnosis and TB-therapy monitoring in children.
Original languageEnglish
Pages (from-to)526-533
Number of pages8
JournalJournal of Infection
Volume77
DOIs
Publication statusPublished - 2018

Keywords

  • Biomarkers
  • Children
  • HBHA
  • IGRA
  • Infectious Diseases
  • Microbiology (medical)
  • Monitoring of therapy
  • Quantiferon
  • Tuberculosis

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