Diagnosis of latent tuberculosis infection among HIV discordant partners using interferon gamma release assays View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2011-09-30

AUTHORS

Naasha J Talati, Esteban Gonzalez-Diaz, Charles Mutemba, Joyanna Wendt, William Kilembe, Lawrence Mwananyanda, Elwyn Chomba, Susan Allen, Carlos del Rio, Henry M Blumberg

ABSTRACT

BackgroundThere is limited data on the effect of HIV status and CD4 counts on performance of Interferon-g Release assays (IGRAs) for diagnosis of latent tuberculosis infection (LTBI).MethodsA cross sectional study was conducted to assess the prevalence of and risk factors for a positive diagnostic test for LTBI, using tuberculin skin test (TST) and IGRAs among HIV-discordant couples in Zambia.ResultsA total of 596 subjects (298 couples) were enrolled. Median CD4 count among HIV positive persons was 388 cells/μl, (range 51-1330). HIV negative persons were more likely than their HIV positive partner, to have a positive diagnostic test for LTBI with TST (203 vs 128), QFT (171 vs 109) and TSPOT (156 vs. 109). On multivariate analysis, HIV negative status was an independent predictor for a positive QFT (OR = 2.22, 95% CI 1.42- 3.46) and TSPOT (OR = 1.79, 95% CI 1.16-2.77). Among HIV positive subjects a CD4 count ≥ 388 cells/μl was associated with a positive TST (OR = 1.76 95% CI 1.10-2.82) and QFT (OR = 1.71 95% CI 1.06-2.77) but not TSPOT (OR = 1.20 95% CI 0.74-1.94).ConclusionsPersons with HIV had significantly fewer positive diagnostic tests for LTBI with TST, QFT and TSPOT. Persons with a CD4 count < 388 cells/μl were less likely to have a positive TST or QFT, but not less likely to have a positive TSPOT. TSPOT may perform better than TST or QFT in HIV positive individuals. More... »

PAGES

264

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1471-2334-11-264

DOI

http://dx.doi.org/10.1186/1471-2334-11-264

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1031830231

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/21962029


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