HIV Infections Clinical Trial
Official title:
Improving the Diagnosis and Management of Latent Tuberculosis in Thai Children
The study is a prospective study to improve the diagnosis and management of latent TB in HIV-infected and HIV uninfected children in Thailand. The objectives are to assess the sensitivity and specificity of IGRAs (T-Spot®.TB, a T-cell-based assay, and QuantiFERON®-TB Gold In-tube, a whole blood assay), TST, and a refined symptom-based questionnaire in diagnosing latent TB in 166 HIV-infected and HIV uninfected children in Thailand, and to evaluate the influence of age, nutritional and immune status on children's response to the IGRAs. These children will be screened for TB with a detailed TB contact history, symptom-based questionnaire, physical examination, TST, chest radiograph (and abdominal ultrasound for those with abdominal symptoms), IGRAs, and clinical specimens for acid fast bacilli stain and culture. A diagnostic algorithm will be generated using the combination of test modalities with the highest sensitivity and specificity results.
Study Objectives
- To compare the utility of IGRAs, T-Spot®.TB and QuantiFERON®-TB Gold In-Tube, and TST
for screening of latent TB in HIV-infected children
- To compare these different screening modalities in HIV-infected children to HIV
uninfected children
- To assess the influence of age, nutritional and immune status, prior BCG and TST status
on children's response to IGRAs
- To assess the prognostic value of IGRAs vs. TST in predicting development of active TB
in children over 9 months
Research questions:
Primary:
What is the sensitivity and specificity of IGRAs and TST in screening for latent TB in
HIV-infected and HIV uninfected children in Thailand?
Secondary:
How do age, nutritional and immune status, prior BCG and PPD status influence children's
response to IGRAs? What is the prognostic value of IGRAs vs. TST in predicting development
of active TB in children over 9 months?
This is a prospective cohort study conducted at two sites in Bangkok, Thailand: HIV
Netherlands Australia Thailand (HIV-NAT) Clinic/Chulalongkorn Hospital and Queen Sirikit
National Institute of Child Health.
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Observational Model: Cohort, Time Perspective: Prospective
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