TY - JOUR
T1 - Diagnostic accuracy of a rapid urine lipoarabinomannan test for tuberculosis in HIV-infected adults
AU - Nakiyingi, Lydia
AU - Moodley, Vineshree Mischka
AU - Manabe, Yukari C.
AU - Nicol, Mark P.
AU - Holshouser, Molly
AU - Armstrong, Derek T.
AU - Zemanay, Widaad
AU - Sikhondze, Welile
AU - Mbabazi, Olive
AU - Nonyane, Bareng A.S.
AU - Shah, Maunank
AU - Joloba, Moses L.
AU - Alland, David
AU - Ellner, Jerrold J.
AU - Dorman, Susan E.
N1 - Publisher Copyright:
Copyright © 2014 by Lippincott Williams & Wilkins.
PY - 2014/7/1
Y1 - 2014/7/1
N2 - Objective: In settings of high HIV prevalence, tuberculosis control and patient management are hindered by lack of accurate, rapid tuberculosis diagnostic tests that can be performed at point-of-care. The Determine TB LAM Ag (TB LAM) test is a lateral flow immunochromatographic test for detection of mycobacterial lipoarabinomannan (LAM) in urine. Our objective was to determine sensitivity and specificity of the TB LAM test for tuberculosis diagnosis. Design: Prospective diagnostic accuracy study. Setting: Hospital and outpatient settings in Uganda and South Africa. Participants: HIV-infected adults with tuberculosis symptoms and/or signs. Methods: Participants provided a fresh urine specimen for TB LAM testing, blood for mycobacterial culture, and 2 respiratory specimens for smear microscopy and mycobacterial culture. Main Outcome Measures: For the TB LAM test, sensitivity in participants with culture-positive tuberculosis and specificity in participants without tuberculosis. Results: A total of 1013 participants were enrolled. Among culturepositive tuberculosis patients, the TB LAM test identified 136/367 (37.1%) overall and 116/196 (59.2%) in the group with CD4 ≤100 cells per cubic millimeter. The test was specific in 559/573 (97.6%) patients without tuberculosis. Sensitivity of the urine TB LAM test plus sputum smear microscopy was 197/367 (53.7%) overall and 133/196 (67.9%) among those with CD4 ≤100. CD4 ≤50 [adjusted odds ratio (AOR), 6.2; P<0.001] or 51-100 (AOR, 7.1; P < 0.001), mycobacteremia (AOR, 6.1; P<0.01) and hospitalization (AOR, 2.6; P = 0.03) were independently associated with a positive TB LAM test. Conclusions: In HIV-positive adults with CD4 ≤100, the TB LAM urine test detected over half of culture-positive tuberculosis patients, in <30 minutes and without the need for equipment or reagents.
AB - Objective: In settings of high HIV prevalence, tuberculosis control and patient management are hindered by lack of accurate, rapid tuberculosis diagnostic tests that can be performed at point-of-care. The Determine TB LAM Ag (TB LAM) test is a lateral flow immunochromatographic test for detection of mycobacterial lipoarabinomannan (LAM) in urine. Our objective was to determine sensitivity and specificity of the TB LAM test for tuberculosis diagnosis. Design: Prospective diagnostic accuracy study. Setting: Hospital and outpatient settings in Uganda and South Africa. Participants: HIV-infected adults with tuberculosis symptoms and/or signs. Methods: Participants provided a fresh urine specimen for TB LAM testing, blood for mycobacterial culture, and 2 respiratory specimens for smear microscopy and mycobacterial culture. Main Outcome Measures: For the TB LAM test, sensitivity in participants with culture-positive tuberculosis and specificity in participants without tuberculosis. Results: A total of 1013 participants were enrolled. Among culturepositive tuberculosis patients, the TB LAM test identified 136/367 (37.1%) overall and 116/196 (59.2%) in the group with CD4 ≤100 cells per cubic millimeter. The test was specific in 559/573 (97.6%) patients without tuberculosis. Sensitivity of the urine TB LAM test plus sputum smear microscopy was 197/367 (53.7%) overall and 133/196 (67.9%) among those with CD4 ≤100. CD4 ≤50 [adjusted odds ratio (AOR), 6.2; P<0.001] or 51-100 (AOR, 7.1; P < 0.001), mycobacteremia (AOR, 6.1; P<0.01) and hospitalization (AOR, 2.6; P = 0.03) were independently associated with a positive TB LAM test. Conclusions: In HIV-positive adults with CD4 ≤100, the TB LAM urine test detected over half of culture-positive tuberculosis patients, in <30 minutes and without the need for equipment or reagents.
KW - Diagnosis
KW - HIV
KW - Opportunistic infections
KW - Sensitivity and specificity
KW - Tuberculosis
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U2 - 10.1097/QAI.0000000000000151
DO - 10.1097/QAI.0000000000000151
M3 - Article
C2 - 24675585
AN - SCOPUS:84922395137
VL - 66
SP - 270
EP - 279
JO - Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology
JF - Journal of Acquired Immune Deficiency Syndromes and Human Retrovirology
SN - 1525-4135
IS - 3
ER -