Antibodies against mycobacterial proteins as biomarkers for HIV-associated smear-negative tuberculosis

Michael Siev, Douglas Wilson, Supreet Kainth, Victoria O. Kasprowicz, Catherine M. Feintuch, Elizabeth R. Jenny-Avital, Jacqueline M. Achkar

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Serology data are limited for patients with sputum smear-negative HIV-associated active tuberculosis (TB). We evaluated the serum antibody responses against the mycobacterial proteins MPT51, MS, and echA1 and the 38-kDa protein via enzyme-linked immunosorbent assay (ELISA) in South African (S.A.) HIV-positive (HIV+) smear-negative TB patients (n = 56), U.S. HIV+ controls with a positive tuberculin skin test (TST+; n = 21), and S.A. HIV-negative (HIV-) (n = 18) and HIV+ (n = 24) controls. TB patients had positive antibody reactivity against MPT51 (73%), echA1 (59%), MS (36%), and the 38-kDa protein (11%). Little reactivity against MPT51 and echA1 was observed in control groups at low risk for TB, i.e., S.A. HIV- (0% and 6%, respectively), and at moderate risk for TB development, i.e., U.S. HIV+ TST+ controls (14% and 10%, respectively). By contrast, more reactivity was detected in the S.A. HIV + control group at higher risk for TB (25% and 45%, respectively). Our data hold promise that antibody detection against MPT51 and echA1 might have adjunctive value in the detection of HIV+ smear-negative TB and might reflect increasing Mycobacterium tuberculosis infection activity in asymptomatic HIV+ individuals.

Original languageEnglish (US)
Pages (from-to)791-798
Number of pages8
JournalClinical and Vaccine Immunology
Issue number6
StatePublished - Jun 2014

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Clinical Biochemistry
  • Microbiology (medical)


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