View clinical trials related to Latent Tuberculosis.
Filter by:This study will evaluate new technique, microneedle, to detect latent tuberculosis (TB) in healthy volunteers
An open-label, randomised controlled trial comparing compliance to treatment for latent tuberculosis infection in socially marginalised citizens. Participants will be randomized to either daily isoniazid for 6 months or weekly rifapentine and isoniazid as directly observed therapy for twelve weeks.
Background: Tuberculosis (TB) is a severe disease and a major cause of death in many people worldwide. It is caused by a bacteria that enters through the lungs and can spread elsewhere in the body. People with latent TB have the bacteria that lie dormant but can become active and cause disease. These people are offered treatment to prevent development of active TB. Worldwide, a lot of people with LTBI also have a parasitic worm called a helminth that can stay in the gut or the blood. These parasites can affect the immune system and cause diseases like TB to become worse. Researchers want to see how helminth infection makes it harder for people to fight TB infection. Objectives: - To study how the immune system of people with latent tuberculosis infection (LTBI) acts to prevent development of active TB. Also, to study how helminth infection might affect this immune response. Eligibility: - Adults age 18 70 with LTBI as defined by an approved blood test called QuantiFERON TB Gold. - No evidence of infections like Hepatitis or HIV - Pregnant subjects and subjects taking medications that suppress the immune system are not eligible. - Have not received prior treatment for LTBI. Participants might be still eligible if prior treatment for active TB has been received Design: Screening phase: - Participants will be screened with medical history, physical exam, and blood tests for other infections/conditions which might affect the immune system. They will have testing for active TB i.e. blood testing as well as testing of their spit, scans and X-rays. Baseline phase: - Only eligible participants will be entered into the study. - Participants will have interviews, medical history, and physical exam. - Blood will be drawn from an arm vein for testing. - Participants will collect stool samples at home for 3 days in a row to test for helminth infection.. - Participants may have apheresis. Blood cells are removed by needle. They pass through a separator machine which returns everything but the cells back to the participant. - Participants may have procedures at the start and end of the study that let researchers look into the lungs and collect cells. Study phase, about 2 years: - All participants will be offered treatment for LTBI which lasts 6-9 months. - Participants being treated for LTBI will have about 11 study visits. They will visit monthly for 9 months while on treatment, then 6 and 12 months after treatment. - Participants not eligible/refusing treatment for LTBI will be made aware of active TB, then have 3 other visits, about 6, 12, and 24 months after the baseline visit. - Participants who have helminth infection will receive appropriate treatment. - All participants will have blood drawn at each visit.
A multicenter, prospective, non-inferiority, randomized and open clinical trial comparing levofloxacin with isoniazid in the treatment of latent tuberculosis infection in patients eligible for liver transplantation. Patients over 18 years of age on the waiting list for liver transplantation. Sample size: n=870 patients. HYPOTHESIS Levofloxacin treatment of latent tuberculosis infection, begun while on the waiting list for liver transplantation, is safer and not less effective than isoniazid treatment begun after transplantation when liver function is stable.
Background: - Tuberculosis (TB) is a leading cause of death worldwide. Those who are exposed to the TB bacteria but have not become sick are said to have latent TB. Many people with latent TB will not get sick from it, but some people will develop active TB and become sick. Much is known about how to treat and diagnose active TB, but little is known about the best way to treat latent TB. Researchers also want to know more about the risk that latent TB will develop into active TB, and whether it is possible to test for this risk. Objectives: - To test possible methods of determining a person s risk for developing active TB. Eligibility: - Individuals between 20 and 60 years of age who (1) have active TB, (2) were exposed to someone with active TB in the past 9 months, or (3) have not been exposed to TB. Design: - Participants will be separated into groups based on their exposure to TB. - Healthy participants who were not exposed to TB will answer questions about their medical history. They will also provide blood and urine samples. - Participants who have active TB will have a physical exam and medical history. They will provide blood, urine, and sputum samples, and will have a chest x-ray. They will be treated with the standard of care for active TB. Some participants with active TB may have additional tests as part of this study. - Participants who were exposed to TB and have latent TB will have a physical exam and medical history. They will provide blood, urine, and sputum samples, and will have a chest x-ray. They will be asked to return for five more clinic visits over the next 12 months to repeat these tests. They may also have additional chest imaging studies depending on the study needs. - Some of the exposed participants may have been exposed to drug-resistant TB. These participants will receive the drug isoniazid to take on a regular schedule to help prevent the latent TB from becoming active TB.
The objective of the study was to compare the compliance and the side effects of a short course to treatment of latent tuberculosis infection during 3 months(isoniazid plus rifampin)group I, with the standard course for 6 months(isoniazid)group II .Prospective, comparative, randomized and open trial of patients with positive TST and the suitable criteria for treatment, in accordance with the guidelines of the CDC, excluding HIV infection. 105 patients were included. In Conclusion, a short course with isoniazid plus rifampin during 3 months shown better compliance with a lower percentage of abandonment that the course 6H. Tolerance is similar in the two courses.