A comparison of interferon-γ and IP-10 for the diagnosis of tuberculosis
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A comparison of interferon-γ and IP-10 for the diagnosis of tuberculosis. / Holm, Line Lindebo; Rose, Michala Vaaben; Kimaro, Godfather; Bygbjerg, Ib C; Mfinanga, Sayoki G; Ravn, Pernille; Ruhwald, Morten.
In: Pediatrics, Vol. 134, No. 6, 12.2014, p. e1568-75.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A comparison of interferon-γ and IP-10 for the diagnosis of tuberculosis
AU - Holm, Line Lindebo
AU - Rose, Michala Vaaben
AU - Kimaro, Godfather
AU - Bygbjerg, Ib C
AU - Mfinanga, Sayoki G
AU - Ravn, Pernille
AU - Ruhwald, Morten
N1 - Copyright © 2014 by the American Academy of Pediatrics.
PY - 2014/12
Y1 - 2014/12
N2 - OBJECTIVE: Interferon-γ and IP-10 release assays are diagnostic tests for tuberculosis infection. We have compared the accuracy of IP-10 and QuantiFERON-TB Gold In-tube [QFT-IT] in Tanzanian children suspected of having active tuberculosis (TB).METHODS: Hospitalized Tanzanian children with symptoms of TB were tested with the QFT-IT and IP-10 tests and retrospectively classified into diagnostic groups. Adults with confirmed TB were assessed in parallel.RESULTS: A total of 203 children were included. The median age was 3.0 years (interquartile range: 1.2-7.0), 38% were HIV infected, 36% were aged <2 years, and 58% had a low weight-for-age. IP-10 and QFT-IT test performance was comparable but sensitivity was low: 33% (1 of 3) in children with confirmed TB and 29% (8 of 28) in children with probable TB. Rates of indeterminate responders were high: 29% (59 of 203) for IP-10 and 26% (53 of 203) for QFT-IT. Age <2 years was associated with indeterminate test outcome for both IP-10 (adjusted odds ratio [aOR]: 2.2; P = .02) and QFT-IT (aOR: 2.4; P = .01). TB exposure was associated with positive IP-10 test outcome (aOR: 3.6; P = .01) but not with positive QFT-IT outcome (aOR 1.4; P = .52). In 102 adults, test sensitivity was 80% for both tests (P = .248).CONCLUSIONS: Although IP-10 and QFT-IT performed well in Tanzanian adults, the tests exhibited an equally poor performance in diagnosing active TB in children. Test performance was especially compromised in young children. Neither test can be recommended for use in hospitalized children in high-burden settings.
AB - OBJECTIVE: Interferon-γ and IP-10 release assays are diagnostic tests for tuberculosis infection. We have compared the accuracy of IP-10 and QuantiFERON-TB Gold In-tube [QFT-IT] in Tanzanian children suspected of having active tuberculosis (TB).METHODS: Hospitalized Tanzanian children with symptoms of TB were tested with the QFT-IT and IP-10 tests and retrospectively classified into diagnostic groups. Adults with confirmed TB were assessed in parallel.RESULTS: A total of 203 children were included. The median age was 3.0 years (interquartile range: 1.2-7.0), 38% were HIV infected, 36% were aged <2 years, and 58% had a low weight-for-age. IP-10 and QFT-IT test performance was comparable but sensitivity was low: 33% (1 of 3) in children with confirmed TB and 29% (8 of 28) in children with probable TB. Rates of indeterminate responders were high: 29% (59 of 203) for IP-10 and 26% (53 of 203) for QFT-IT. Age <2 years was associated with indeterminate test outcome for both IP-10 (adjusted odds ratio [aOR]: 2.2; P = .02) and QFT-IT (aOR: 2.4; P = .01). TB exposure was associated with positive IP-10 test outcome (aOR: 3.6; P = .01) but not with positive QFT-IT outcome (aOR 1.4; P = .52). In 102 adults, test sensitivity was 80% for both tests (P = .248).CONCLUSIONS: Although IP-10 and QFT-IT performed well in Tanzanian adults, the tests exhibited an equally poor performance in diagnosing active TB in children. Test performance was especially compromised in young children. Neither test can be recommended for use in hospitalized children in high-burden settings.
KW - Chemokine CXCL10
KW - Child
KW - Child, Preschool
KW - Developing Countries
KW - Female
KW - HIV Infections
KW - Humans
KW - Infant
KW - Interferon-gamma
KW - Interferon-gamma Release Tests
KW - Male
KW - Opportunistic Infections
KW - Predictive Value of Tests
KW - Tanzania
KW - Tuberculosis
U2 - 10.1542/peds.2014-1570
DO - 10.1542/peds.2014-1570
M3 - Journal article
C2 - 25422019
VL - 134
SP - e1568-75
JO - Pediatrics
JF - Pediatrics
SN - 0031-4005
IS - 6
ER -
ID: 135158653