View clinical trials related to Tuberculosis.
Filter by:This is a randomized, double-blind, placebo-controlled, single ascending dose study conducted at one study center in Switzerland. Four (4) panels (A, B, C and D) of 8 male subjects (6 active and 2 placebo) each undergoing 2 investigation periods and receiving either single doses of PBTZ169 at increasing dose levels or a matching placebo. Subjects will participate in only one panel. Blocks of 4 subjects (3 under active treatment, 1 under placebo) will be investigated in parallel. Panels A and B are interleaved. Safety will be assessed throughout the study; serial ECGs and serial blood samples will be collected for the safety and PK assessment of PBTZ169. Dose escalation will be allowed once the Trial Safety Board has determined that adequate safety and tolerability after panel B and panel C completion has been demonstrated to permit proceeding to the next panel.
Maternal infections affect the basal immune status of neonates. One of the possible mechanism is the fetomaternal microchimerism, in which some cells and active substances are exchanged bi-directionally between maternal and fetal circulation through placenta. Even in the absence of a direct (vertical) transmission of pathogens to fetuses, certain infections make the neonates more prone to allergies and some adverse events of early vaccinations. We postulate that the basal immune status of neonates born to HIV and LTBI infected mothers is primed by gestational exposure to immunological active molecules, which could results in an altered response to early BCG vaccination. Transcripts expression identified by RNA sequencing are compared between sets of mother-child and their respective umbilical cord blood, and between groups of infected and non-infected pairs.
TB is a global health problem and in South Africa rates as the second most important problem in terms of Burden of Disease. There are many reasons for this, among which are diagnostic difficulties, extended treatments, drug resistance and health care provision. This application is concerned with all these drivers and will focus activities on a clinic which provides basic care in a very deprived socio-economic area of greater Cape Town, South Africa. Patients studied in routine, but demanding environments are our focus as these clinics are representative of many areas where TB (and HIV) are found at high prevalence. If the constraints of working in such areas can be understood and appropriate changes that work made, the investigators believe the outputs and policy changes generated in this study will contribute to future success in other settings. The investigators wish to study the implementation of the Xpert®MTB/RIF (Xpert) and Xpert Ultra (Ultra) systems in situ using a randomised controlled trial design, as opposed to a remote site (central laboratory), to assess whether time to diagnosis can be improved using point of care (POC). The investigators wish to maximise this opportunity by collecting biological samples from a patient population experiencing a TB epidemic for the evaluation of future TB diagnostics. Using human DNA, the investigators will attempt to determine reasons for poor or no treatment response. Two possibilities exist for this: a) the M. tuberculosis strain is resistant to the drug in question or b) the patient is highly susceptible to the bacterium. The investigators will determine the exome sequences of study participants with susceptible M. tuberculosis strains who show poor or no response, and compare this with rapid responders. Using 16S rRNA sequencing, the investigators will also observe how the microbiome of TB patients is altered during TB treatment and how this is associated with treatment outcome, as well as after TB treatment. This project will set the foundation for the implementation of new POC TB diagnostic technologies in clinics in South Africa. The biobanked specimens collected can be rapidly utilised for nascent technologies. Studying the patient microbiome will provide insights into what makes some patients more susceptible to TB and what microbiological changes occur during the course of anti-TB treatment.
Title: Evaluation of host biomarker-based point-of-care tests for targeted screening for active TB (Screen TB) Introduction: Tuberculosis (TB) places severe pressure on health care services of the developing world. Despite the introduction of the highly sensitive and specific GeneXpert MTB/RIF (GeneXpert) test [1] with a potential turn-around time of two hours, many people in high TB prevalence areas still do not have access to efficient TB diagnostic services due to logistical constraints in these settings. A cost effective, rapid, point-of-care screening test with high sensitivity would identify people with a high likelihood for active TB and would prioritize them for testing with more expensive, technically or logistically demanding assays including GeneXpert or liquid culture, facilitating cost-effective diagnostic work-up in resource-limited settings. A serum cytokine signature for active TB disease, discovered in the AE-TBC project, with a sensitivity of 89% (CI 78 - 95%) and specificity of 76% (CI 68 - 83%), will be optimised and utilized in a point-of-care format (TransDot) to rapidly test for TB disease in symptomatic people. Hypothesis: The TransDot test will achieve a sensitivity of > 90% for TB disease, in a training set of people suspected of having TB disease, and be validated (achieve similarly high sensitivity) subsequently in a prospective test set of people suspected of having TB disease, when compared to a composite gold standard of sputum culture, smear, GeneXpert, chest X-ray, TB symptoms and TB treatment response. Objectives: The overall objective of the study is to incorporate a six-marker serum signature into a multiplex UCP-LFA format, referred to as TransDot, for finger-prick blood testing. The end point of the study is the accuracy (sensitivity and specificity) of the UCP-LFA TransDot test on finger-prick blood for active TB and will be prospectively compared against gold standard composite diagnostic criteria (GeneXpert, MGIT culture, TB sputum smear, CXR, TB symptom screen and response to TB treatment). Primary: The primary outcome of interest will be accuracy, sensitivity and specificity of the TransDot finger-prick test when compared with the composite gold standard tests.
To evaluate the efficacy, safety and tolerability at 8 weeks (2-months), 52 weeks (12-months), and 104 Weeks (24-months) post the start of the following treatment regimens in participants with: Drug Sensitive TB (DS-TB) patients given BPaMZ for 17 Weeks ( or 4 months) vs. Standard HRZE/HR treatment given for 26 weeks (or 6 months) and Drug Resistant TB (DR-TB) patients given BPaMZ for 26 Weeks (or 6 months)
The overall objective of this study is to determine if a multi-component implementation intervention (SPIRIT) and additional leadership and management training that targets District Health Officers (DHOs) can increase IPT initiation among HIV-infected persons, as compared to country standard practices, in a cluster randomized trial in Uganda.
Women living in low-income countries are at elevated risk of death in connection to pregnancy, as well as infants born to women in such settings. It is probable that several factors are involved, such as poverty, lack of education and access to healthcare. Infectious diseases constitute important threats to maternal health in resource-limited settings. Tuberculosis (TB) is reported to be the third leading cause of maternal death globally. Furthermore, TB can be transmitted from mother to child during pregnancy, with high risk of severe consequences for the infant. Despite these data, neither the role of TB in relation to co-existing risk factors for adverse pregnancy outcomes, nor the mechanisms involved, are well understood. It is likely that TB interacts with other characteristics, in particular socio-economic condition and HIV infection, which could obscure associations between TB and pregnancy outcomes. For this reason, it is critical to design studies so that the independent role of TB can be deduced. This project aims to investigate how TB infection in women affects the risk of adverse pregnancy outcomes in relation to co-existing factors, and how exposure to TB infection may impact growth and development of infants born to women with TB. In addition, mechanisms in which TB and the immune system during pregnancy will be explored. The project is conducted at public health facilities in Ethiopia, where 2 000 women have been recruited during antenatal care. These women will be followed until 5 years after delivery, along with their offspring born during the study period. Detailed data is collected at inclusion and at study visits during follow-up, with submission of samples for TB testing and immunological analyses. Better knowledge on the characteristics of TB infection in association with pregnancy, and how TB affects maternal and child health, can be used to construct new guidelines for management of TB in women of fertile age. This may contribute to reductions in adverse pregnancy outcomes, including maternal and infant deaths.
Recent advances in molecular diagnostics of tuberculosis, especially the GeneXpert Mycobacterium tuberculosis/Rifampicin test have reduced the time to diagnose Rifampicin Resistant Tuberculosis (RR-TB) but only rifampicin resistance is diagnosed, leading to presumptive diagnosis of resistance to isoniazid and maybe other drugs. Thus in low and middle income countries, most drug sensitivity testing relies on phenotypic drug resistance testing, which takes up to 4 months. In addition, currently, culture on monthly sputum samples is recommended by the World Health Organization for follow-up of Rifampicin Resistant Tuberculosis patients under treatment. Unfortunately, culture is often not locally available and samples need to be transported from field to culture laboratories. The associated transport delays lead to high rates of contamination and false negative culture, particularly in laboratories in low resource settings. Many gaps for the diagnosis and management of RR-TB patients still need to be addressed and the DIAMA project (DIAgnostics for Multidrug resistant tuberculosis in Africa) study aims to address some of them.
The Alcohol Drinkers' Exposure to Preventive Therapy for TB (ADEPTT) will examine the safety and tolerability of, and adherence to, 6 months of daily INH (6H) in 300 TB and HIV-infected persons (200 drinkers and 100 non-drinkers) in Uganda. The first aim is to evaluate the safety and tolerability of 6H overall and by level of alcohol use. The second aim is to estimate adherence and compare adherence by level of alcohol use and at 3 and 6 months. Self-reported measures of alcohol use will be augmented by phosphatidylethanol (PEth), an established biomarker of alcohol use. Objective measures of adherence will include electronic pill bottle monitoring and a novel measure of INH exposure, INH concentration in hair. The study will actively monitor for hepatotoxicity using the U.S. standard of care for TB preventive therapy for heavy drinkers and discontinue if any Grade 3/4 toxicities are detected. The investigators will use the safety, tolerability, and adherence results, together with the known efficacy and mortality benefit of TB preventive therapy in HIV-infected persons in SSA, and an established decision analytic model of TB preventive therapy to conduct the third aim: to determine whether the benefits of TB preventive therapy outweigh the toxicity risks for HIV-infected drinkers in resource limited settings. The study will additionally follow the cohort every 6 months after completing INH to monitor drinking and the development of active TB.
Diagnosis and treatment of tuberculosis are often delayed in hospitalized patients, leading to worse outcomes. Rapid diagnosis of tuberculosis currently relies on microscopy and molecular techniques, which have limitations including low sensitivity and high cost.Highly sensitive diagnostic technique is needed for more accurate rapid diagnosis of tuberculosis to aid earlier initiation of antituberculous therapy. Detection of Mycobacterium tuberculosis (MTB) antigens in the bloodstream can potentially allow early diagnosis of tuberculosis. This study aims to evaluate the diagnostic performance of a novel assay using nanotechnology to detect MTB antigens in patients admitted to hospital with suspected pulmonary and/or extrapulmonary tuberculosis. Blood will be taken from eligible patients, and will be sent to the School of Biological and Health Systems Engineering, Arizona State University, for detection of 10-kDa culture filtrate protein (CFP-10) and the 6 kDa early secretory antigenic target (ESAT-6), two antigens specific for MTB, using the Nanodisk-MS assay. Investigations, including microscopy, culture, MTB polymerase chain reaction (PCR), and imaging, will be performed for diagnosis of tuberculosis. The diagnostic performance of Nanodisk-mass spectrometry (MS) assay will be evaluated.