Active clinical trials for "Tuberculosis, Pulmonary"

Imaging using 11C-acetate PET (positron emission tomography) in patients with tuberculosis (TB) may be able to detect non-replicating persister bacilli. This may permit identification of those patients at risk of relapse following completion of TB treatment. The main aim of this pilot study is to assess the ability of 11C-acetate PET to detect pulmonary lesions in individuals with active pulmonary TB.

This study is a retrospective cohort study. The purpose of this study is to investigate clinical features of the patients with the cavitary pulmonary tuberculosis (TB) and endobronchial TB from the patients who have been registered in this hospital for treatment and follow-up, as part of the "PPM Project (Private-Public Mix project) for Korean National Tuberculosis Control" introduced in Korea since 2007.

This is a multi-center, blinded study to determine the performance of the YD Diagnostic Corporation (YD) REBA MTB-MDR® and Hain Genotype MTBDRplus V2 kit in a total of 600 clinical isolates and 900 residual sputum samples from patients with symptoms of pulmonary TB (PTB) and at risk of drug resistance. All testing was done on stored, de-identified leftover samples. The study involved three World Health Organization (WHO) Supranational Reference Laboratories with well-characterized strain collections and access to sputum samples with significant rates of drug resistance.

Diagnosis of extra pulmonary tuberculosis remains especially challenging since the number of Mycobacterium tuberculosis bacilli present in tissues at sites of disease is often low and clinical specimens from deep-seated organs may be difficult to obtain. Histology is time-consuming to undertake and establishing a diagnosis of tuberculosis with high specificity remains difficult. Tissue microscopy after special staining is often negative and when mycobacteria are seen, it is impossible to distinguish Mycobacterium tuberculosis from non tuberculous mycobacterial disease. Reliance on culture, the mainstay of diagnosis, often leads to considerable delays, compromising patient care and outcomes. Evidence from 138 studies published before 2008 suggested that nucleic acid amplification technologies could not replace conventional mycobacterial tests (microscopy, culture) for diagnosing pulmonary and, especially, extra pulmonary tuberculosis

Consenting adults presenting with signs and symptoms compatible with pulmonary tuberculosis will be interviewed for demographic and medical information, and then will be asked to provide 3-4 expectorated sputum specimens. In the study laboratory, sputa will be tested using conventional and investigational diagnostic tests for tuberculosis and rifampin resistance.

Some of pulmonary tuberculous patients who completed their medication course experience lung function impairment

The purpose of this study is to see if involving community health workers improves tuberculosis case finding and treatment outcome.

The aim of this study is to elucidate the prevalence of nontuberculous mycobacterial (NTM) co-infection in patients with smear positive pulmonary TB. To detect the NTM co-infection, we will perform duplex PCR targeted for mycobacterial hsp 65 gene using sputa. In addition, the clinical significance of this co-infection will be evaluated.

India has the highest incidence of and mortality from multi-drug resistant tuberculosis (MDR-TB) globally. Vitamin D status may be an important determinant of MDR-TB infection and treatment outcomes; however, observational evidence is insufficient to support its use as an adjunct therapy or prophylaxis. Using a case-control design, this study will evaluate the relationship between vitamin D status and active MDR-TB disease among adult outpatient pulmonary MDR-TB cases, household contact controls, and matched controls from the general population (non-household controls) in Mumbai, India. This study will also evaluate the cross-sectional association between vitamin D status and TB infection among household contact controls and non-household controls, and collect formative data in preparation for future randomized controlled trials of vitamin D in MDR-TB prevention and treatment in India.

determination if time-to-detection in cultures of M. tuberculosis samples is more discriminating than acid-fast staining in transmission