USEFULNESS OF INTERFERON-GAMMA RELEASE ASSAYS IN THE DIAGNOSIS OF TUBERCULOSIS INFECTION IN HIV-INFECTED PATIENTS IN BULGARIA

被引:11
|
作者
Markova, R. [1 ]
Todorova, Y. [1 ]
Drenska, R. [1 ]
Elenkov, I. [2 ]
Yankova, M. [2 ]
Stefanova, D. [3 ]
机构
[1] Natl Ctr Infect & Parasit Dis, Dept Immunol & Allergol, Sofia, Bulgaria
[2] Infect Dis Hosp Prof Ivan Kirov, AIDS Clin, Sofia, Bulgaria
[3] Univ Hosp Lung Dis St Sofia, TB Clin, Sofia, Bulgaria
关键词
Tuberculosis; HIV-AIDS; IFN-gamma; immunodiagnosis; IGRA; CD4+T cells; QUANTIFERON-TB GOLD; MYCOBACTERIUM-TUBERCULOSIS; IMMUNE-RESPONSES; SENSITIVITY; UTILITY; ADULTS; TESTS;
D O I
10.1080/13102818.2009.10817622
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
We aimed to evaluate the usefulness of incorporating the result from an IFN-gamma release assay, (IGRA) in the algortihm for initial diagnosis of tuberculosis (TB) in prospectively enrolled HIV-infected subjects. Ninety HIV-infected subjects with clinical and/or radiological features consistent with a possible diagnosis of active-TB were tested with QuantiFERON (R)-TB Gold In-Tube (QFT) and T-SPOT.TB (TM) (SPOT). All information, including IGRA results, was available to clinicians for making their diagnosis. Those diagnosed with TB were given anti-TB treatment and samples were, collected for microbiological culture. Overall, 35/90 patients were QFT positive and 30/90 by SPOT.QFT was indeterminated for 5/90 subjects (5.5%) and SPOT for 11/90 (12.2%; p=0.0313). Active-TB was microbiologically confirmed in 13 subjects and twelve (92%) were positive by QFT and one was negative. For SPOT 8/12 (62%; p=0.125) were positive, one-negative, and 4 were indeterminate. Of the 77 HIV-positive subjects without microbiologically confirmed active-TB, 23 (30%) were positive, 49 (64%) negative, and 5 (6%) indeterminate by QFT compared with 22 (29%), 48 (62%) and 7 (9%) by SPOT. Those IGRA positive, and two who were IGRA indeterminate, had a final presumptive diagnosis of active-TB, based upon initial clinical symptoms and improvement with anti-TB treatment. All IGRA negative subjects had a diagnosis other than tuberculosis and none have since developed active TB over a period of more than 12 month. In conclusion, both IGRAs provided useful additional information for assisting the diagnosis and early treatment of Mycobacterium tuberculosis infection in immunocompromised HIV/AIDS patients with negative smear microscopy A positive IGRA result was a significant factor in making initial diagnoses of TB, diagnoses that were later supported by clinical outcome following anti-TB therapy, and diagnoses other than TB in thos IGRA negative. The QFT and SPOT tests had similar high sensitivity, with QFT having fewer indeterminate results, in our HIV-infected immunocompromised population.
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收藏
页码:1103 / 1108
页数:6
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