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2014 ; 93
(15
): e87
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gab.com Text
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English Wikipedia
Comparison of the interferon-gamma release assay with the traditional methods for
detecting Mycobacterium tuberculosis infection in children
#MMPMID25275527
Zhou J
; Kong C
; Shi Y
; Zhang Z
; Yuan Z
Medicine (Baltimore)
2014[Oct]; 93
(15
): e87
PMID25275527
show ga
The purpose of the article is to compare the whole blood interferon-? release
assay (IGRA) with the traditional methods for detecting Mycobacterium
tuberculosis (MTB) infection in children. Fifteen childhood patients with
tuberculosis and 15 healthy children were recruited. Sputa samples and venous
blood were collected, and according to different procedures, IGRA, sputum smear,
colloidal gold assay (CGA), fluorescence quantitation polymerase chain reaction
(FQ-PCR), and tuberculosis skin test (TST) were, respectively, performed. Thirty
healthy children vaccinated with Bacillus Calmette-Guérin (BCG) were also
recruited, and the comparative test was carried out between IGRA and TST. In all
of 15 childhood patients with TB, the positive rates were 86.7%, 20.0%, 26.7%,
40%, and 66.7% in IGRA, sputum smear, CGA, FQ-PCR, and TST, respectively. In the
children vaccinated with BCG, the positive rate of IGRA was significantly lower
than that of TST (6.7% vs 76.7%). From high to low, the specificities of the five
methods were sputum smear (100%), IGRA (86.7%), FQ-PCR (86.7%), TST (40%), and
CGA (26.7%). Although the specificities of sputum smear and FQ-PCR were more than
or equal to that of IGRA, the relative sensitivities limited their applications
in populations of children. IGRA is a sensitive and specific method, and could be
taken as a first choice for detecting MTB infection in populations of children.