TB Sequel: Pathogenesis and Risk Factors of Long-term Sequelae of Pulmonary TB

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

UNKNOWN

Total Enrollment

1500 participants

Study Classification

OBSERVATIONAL

Study Start Date

2017-09-22

Study Completion Date

2022-06-30

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

This is an observational cohort study. Pulmonary tuberculosis (TB) patients will be enrolled at the time of TB diagnosis and prospectively followed for at least two years after TB-treatment initiation with optional prolonged follow-up. Study visits will be performed in the study clinics or if necessary at the participant's home at pre-defined time points after TB treatment initiation. Clinical assessments, biological sample collections and collection of socio-economic data will be performed according to the pre-defined schedule of events.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Childhood TB Sequel

NCT05325125

Tuberculosis, Pulmonary

UNKNOWN

Study to Evaluate H56:IC31 in Preventing Rate of TB Recurrence

NCT03512249

Tuberculosis, Pulmonary

ACTIVE_NOT_RECRUITING PHASE2

A Phase II Study of H56:IC31 in Healthy Adolescents

NCT03265977

Tuberculosis Infection

WITHDRAWN PHASE2

Immune Response to Mycobacterium Tuberculosis Infection

NCT00257907

Latent Tuberculosis

COMPLETED

A Confirmatory Trial of Adjunctive NAC to Prevent Post Tuberculosis Lung Disease

NCT06909799

Tuberculosis (TB)

RECRUITING NA

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

The African continent today is emblematic of TB as a global health emergency with little known about the long-term sequelae. It is likely that TB patients from resource-constrained settings, who usually present with more extensive disease, are left with greater lung impairment.

This project aims to advance the understanding of the clinical, microbiologic, and host immune factors affecting the long-term sequelae of pulmonary tuberculosis; to identify the most important factors that contribute to lung impairment, including the immunological response and genetic predisposition of the host and differences in the biology of the pathogen; to determine occurrence of reversible and irreversible costs and socioeconomic consequences for patients; and to facilitate novel interventions to restore and preserve overall health, well-being and financial protection in patients with TB.

The core of the current project is a prospective cohort of up to 1600 patients across four countries (Mozambique, Tanzania, South Africa and The Gambia), enrolled at the time of TB diagnosis, and followed up for at least 2 years. The overall goal of the cohort is to describe and analyse the basis of the long-term clinical consequences of pulmonary TB, with a particular focus on lung injury. The investigators will enroll patients during two years and follow each patient up for at least two years. The project also includes a number of sub-studies: Host-Immunology, Pathogen and Socio-Economic. General laboratory tests and TB specific tests, X-ray, physical examination and cardio-pulmonary assessment will be performed and the obtained clinical data will be recorded in study questionnaires. The investigators will collect and analyse biological specimens (blood, urine and sputum) longitudinally during the period of observation and after all specimens have been stored. In-depth analysis of the host immune response, focusing on potential mechanisms of lung damage, including oxidative injury, proteolytic matrix degradation, and neutrophil-mediated damage, neutrophil-macrophage ratios and markers; and molecular analysis of mycobacterial dynamics and markers in relation to pulmonary and microbiological treatment outcomes, including success, failure, relapse, reinfection and death will be carried out. Socio-economic data, including patient costs, will be collected at the time of TB diagnosis, during treatment, at the end of treatment and during the follow-up period, and analysed to determine how the risk of TB sequelae is linked with the socioeconomic position of the patient, to establish the occurrence of catastrophic costs due to TB and the proportion of patients that resort to potentially irreversible socioeconomic coping strategies.

Accurate data source will be maintained and confidentiality will be guaranteed. Data will be analysed according to the statistical plan. Results of the study will be disseminated to all relevant stakeholders through meetings, reports and publications.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Respiratory Tract Infections Tuberculosis, Pulmonary

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

No Intervention, and Observational Study

Observational Study

Intervention Type OTHER

Other Intervention Names

Discover alternative or legacy names that may be used to describe the listed interventions across different sources.

Observational Study

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

* At least one sputum sample tested positive for Mtb by Xpert MTB/RIF assay in the study clinic/study laboratory or at least one sputum sample tested positive by culture methods in study laboratory or other TB laboratory
* Be ≥ 18 years of age
* Willingness to provide a written consent or witnessed oral consent in the case of illiteracy for participation in the study, prior to patient's first sample or other study-specific data being collected
* Willing to be tested for HIV infection
* Agrees to the collection and storage of blood, urine, and sputum specimens for use in future research
* Willing to start anti-TB treatment after TB diagnosis
* Living within the study area and willing to inform the study team of any change of address during the treatment and follow-up period

Exclusion Criteria

* Has received TB treatment in the last 6 months
* Has incapacity to produce and provide two sputum samples of sufficient quality (3 ml)
* Has severe medical or psychiatric condition which in the opinion of the site investigator or designee, might interfere with the ability to give true informed consent and to adhere to the study requirements
* Is currently imprisoned
* Taking part in investigational product trials related to TB and/or lung diseases

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No