Active clinical trials for "Tuberculosis"

Single-center, observational, prospective cohort study including patients hospitalized on the multidrug-resistant tuberculosis ward at Marius Nasta Institute. The increasing rates of multidrug-resistant (MDR) tuberculosis (TB) are causing great concern. The current study that will be conducted at the Marius Nasta Institute, one of two nationwide excellence treatment centers for MDR-TB in Romania, is aiming to prospectively investigate the population structure of patients with MDR-TB admitted for treatment and the M. tuberculosis strains isolated from these patients. Transmission of MDR- strains of Mycobacterium tuberculosis among patients hospitalized there will be also ascertained. Additionally biomarkers for treatment response during the course of the tuberculosis therapy will be evaluated. The study will be conducted in a co-operation between the Marius Nasta Institute and the German Center for Infection Research (DZIF).

Tuberculosis (TB) has overtaken HIV as the leading infectious cause of death worldwide and requires a major policy shift for it to be controlled in line with the WHO Stop-TB goal to "end TB". However, how to control TB at population level in the context of HIV, is unknown. Some of the best evidence to date comes from the Southern African ZAMSTAR trial, where a household-level TB /HIV intervention including TB symptom screening, HIV counselling and testing with linkage to care and isoniazid preventive therapy (IPT) as indicated, was offered to all household members of TB patients. Despite only reaching ~6% of households in the intervention communities, the data showed a nearly 20% reduction in TB disease prevalence and 50% reduction in TB infection incidence at the population-level. Increasing the scope of the intervention to all households and thus all community members, may therefore significantly change the burden of TB and "end TB". The proposed TREATS project builds on the experience of ZAMSTAR and is nested within the ongoing HPTN 071 (PopART) trial (NCT01900977), the largest ever trial of a combination HIV/TB prevention intervention being conducted in Zambia and South Africa. The project consists of 4 linked studies that will provide definitive cluster-randomised evidence of the effect of a household-level combined HIV and TB prevention intervention on the burden of TB at population level. The project will produce two major outputs of global importance to public health policy. The first will provide definitive evidence of the effectiveness of scaled up combination TB/HIV prevention interventions on TB. The second output will improve understanding of the best ways to measure the impact of public health interventions on TB burden. This is a unique opportunity to assess the impact of combination HIV prevention, including universal HIV testing and treatment, combined with population screening for active TB on the burden of TB. The HPTN071(PopART) trial,a cluster randomised trial in 21 communities in Zambia and South Africa with a population size of approximately 1 million individuals, is unlikely ever to be repeated. The recently adopted WHO guidelines of a "universal treatment" strategy for HIV, will prompt policy-makers to seek strategies of case-finding for HIV offering an opportunity to conduct TB screening on a large scale. The results from the TREATS project will therefore provide unique and timely information of the additional costs and benefits of combined TB and HIV prevention strategies at population level. TREATS will also assess novel methods to measure the effect of interventions on burden of TB in the trial communities. The latest interferon gamma release assay QuantiFERON® Gold Plus will be assessed for measuring impact of TB interventions on incidence of infection. A combination of Xpert® MTB/RIF and computer aided digital X-ray (CAD4TB) will be assessed for measuring prevalence of active TB. These new methods will provide important information about the best way of measuring TB incidence and prevalence rates and allow triangulation of the different methods to inform global estimates of TB burden in the post MDG era. The TREATS consortium will stimulate synergy between leading African research groups (Zambart, HST); new European technology (Delft Diagnostic Imaging, Qiagen); international TB bodies (The Union) and European research centres (LSHTM, Imperial College, Sheffield University and KNCV), as well as with the US funders of the HPTN071/PopART trial.

Diagnosis of active and latent pulmonary tuberculosis, as well as extrapulmonary tuberculosis, is still a major challenge of TB control in China. This observational study aims to evaluate TB-antigen responsive T cell markers in the diagnosis of tuberculosis and extrapulmonary tuberculosis and try to find new prompt and cost-effective laboratory tests for active TB screening.

Study based in Southern Ethiopia Purpose - to explore if children in contact with adults with TB have positive acute reactants such as IFN-y and other cytokine responses; if these responses discriminate between high and low risk of disease progression and whether these could be incorporated into improved diagnostic approaches.

We have previoulsy shown that patients with active Tuberculosis develop a wide array of autoantibodies including rheumatoid factor, anti-CCP, Antinuclear facyor and anti Sm antibodies. The purpose of this study is to evaluate whether the level of autoantibodies decrease after treatment aganist tuberculosis.

HIV induced altered representation and function of regulatory T cell subsets (NKT and Treg cells) impair the protective T cell response against M.tuberculosis and disrupts LTBI, thus facilitates faster progression and development of severe forms of clinical TB in HIV-TB co-infection.

Tuberculosis remains one of the largest health problems in the world today. Multidrug therapy is necessary to cure tuberculosis patients and to prevent the selection of drug-resistant mutants, however, which may increase the incidence of side effects during the course of treatment. These side effects may be mild as well as fatal. A severe side effect against one of the anti-TB drugs, which influences drug compliance, may lead to the discontinuation of that drug. At the same time, the risk of treatment failure and relapse are higher. Therefore monitoring the rate of anti-TB drugs induced adverse effects and the related risk factors is crucial. Awareness of the risk groups may decrease the incidence of serious drug-related side effects and medical cost. The fixed-dose combinations (FDCs) of tablets against tuberculosis is now being recommended by WHO, which simplify the prescription of drugs and prevent the development of drug resistance. However, the FDC regimen is not consistent with the dosages that are usually given, the higher risk of drug toxicity and adverse reactions should be considered. To our knowledge, there was no report to assess the adverse effects of FDC anti-TB drugs in Taiwan. The aim of the present study is to investigate the current incidence of side effects and the risk factors related to FDC drugs for side effects during the initial phase of therapy.

The aim of the study is to investigate the possible correlation of plasma drug concentrations with Time To Positivity (TTP) in liquid culture in patients with active pulmonary multi sensitive TB in the first two weeks of treatment. Secondary aims are: the correlation between plasma drug concentrations and hepato/neuro toxicity; the impact of different allelic variants on PK data, toxicity and TTP in liquid culture; the feasibility of using dried blood/plasma spots to measure plasma concentrations of anti-TB drugs and determine genetic polymorphisms.

The investigators aim to study the prevalence of adverse reactions of anti-tuberculosis (TB) drugs in latent tuberculosis infection (LTBI), and determine the risk factors of anti-TB drug-related toxicity in LTBI in Korean health care workers(HCWs).

This study evaluates new technique for diagnosis of tuberculosis. Among patients who are suspected with tuberculosis, participants will be tested conventional method including Xpert TB/RIF assay, and new diagnostic technique using homobifunctionalImidoesters compounds.