View clinical trials related to Mycobacterium Infections.
Filter by:Identify a biologic (molecular) basis for the increased susceptibility of cigarette smokers to pulmonary TB (Mtb) by testing the hypothesis that smoking reprograms AM polarization towards a distinct phenotype associated with impaired host defense function against Mtb and that normalization of that phenotype via therapeutic modulation of the Alveolar Macrophage (AM) polarization or smoking cessation can restore the anti-Mtb host defense function of AM.
1. To investigate the inflammasome response of inflammatory and resting macrophage derived from healthy human participants by stimulation using MAC or MAB bacilli. 2. To compare the difference of inflammasome response of inflammatory macrophage by MAC/MAB bacilli stimulation between MAC/MAB-LD patients and the colonizers. 3. To study the diagnostic aid from immunological markers in inflammasome response in inflammatory macrophage stimulated by MAC/MAB.
Background: - Pulmonary nontuberculous mycobacterial (PNTM) infection is caused by a common type of bacteria in the environment. Although PNTM infection is most common in people with lung diseases, it can also affect healthy people. It can be difficult to treat, and affects parts of the body other than the lungs. For example, PNTM may affect the cilia, the hair-like structures inside the nose and lungs that help move dirt and debris out of the body. - Ciliary beat frequency (CBF) is a measurement of how fast cilia move. People with PNTM infection have a lower CBF than healthy people. Nitric oxide (NO) is a gas in the body that may affect CBF. People with PNTM infection produce lower amounts of NO in their noses than healthy people. Researchers want to see if a drug called sildenafil can increase NO production and CBF. If sildenafil can improve these measurements, it may be a useful treatment for PNTM infection. Objectives: - To study the effect of sildenafil on CBF and NO levels in people with PNTM infection. Eligibility: - Individuals at least 18 years of age who have PNTM infection. - Participants must be enrolled in a related National Institutes of Health study on bacterial infections. The study is Natural History, Genetics, Phenotype and Treatment of Mycobacterial Infections. Design: - Participants will be screened with a physical exam and medical history. They will also have heart and lung function tests, as well as tests of NO production in the nose. They will provide samples of sputum and cells from inside the nose. - Before the first study visit, participants will collect sputum samples for 24 hours. They will bring the samples to the study visit. - At the first study visit, participants will have heart and lung function tests, as well as tests of NO production in the nose. They will provide blood, urine, sputum, and nasal cell samples. They will also receive sildenafil tablets to take at home. - Participants will take sildenafil tablets three times a day. - The second study visit will be 7 days after the first one. The tests from the first visit will be repeated. Participants will receive more sildenafil tablets to take on the same schedule as before. - The third and final study visit will be 30 days after the first one. The tests from the first visit will be repeated. Participants will stop taking sildenafil at this visit. - A follow-up phone call will be made about 2 weeks after the final study visit. This call will ask questions about quality of life and any symptoms or side effects of the study.
The purpose of this study is to determine whether bilateral orthotopic lung transplantation (BOLT) followed by cadaveric partially-matched hematopoietic stem cell transplantation (HSCT) is safe and effective for patients aged 5-45 years with primary immunodeficiency (PID) and end-stage lung disease.
The purpose of this study is to improve tolerance of treatment of pulmonary Mycobacterium avium Complex disease via the use of therapeutic drug monitoring and the addition of anti-nausea medication or dietary supplements to the patients' daily drug regimen. The aims of this study are to use (1) Zofran® (Ondansetron 8mg), an anti-nausea medication or (2) a dietary supplement to decrease medication related gastrointestinal side effects of medications used to treat Mycobacterium avium Complex.
Little is known about the disease caused by the nontuberculous or environmental mycobacteria (NTM) and only limited data are available showing treatment outcome. This project will study the patients with nontuberculous mycobacterial (NTM) diseases in the University of Illinois Hospital & Health Sciences System (UIMC). The aim of study is finding treatment outcome and risk factors that are associated with treatment failure in NTM patients. This is a retrospective, observational study for collecting data on patients with NTM in UIMC. The study initially involves populating the study of NTM patients seen at UIMC during the study period. This will add our knowledge about current treatment outcome of patients with NTM diseases and will be of interest to physicians, and public health authorities.
1. To compare TLR-2 expression of peripheral blood mononuclear cells and serum downstream cytokines in those with MAC or MAB pulmonary infection and those with MAC or MAB pulmonary colonization and controls. 2. To investigate the response of TLR-2 expression and cytokines activation to NTM stimulation test in patients with MAC or MAB pulmonary infection and colonization and controls. 3. To validate the NTM stimulation test for NTM pulmonary infection.
In adult, the prevalence of mycobacterial infections is increased with age is largely unknown. IFN-gamma-IL-12/23 axis or NF-kappaB pathways might also plays crucial roles in adult against mycobacteria. Based on this hypothesis, the investigators had applied a functional assay to these pathways in patients with mycobacterial infection.
Prospective data collection of all patients with microbiologically proven mycobacteria tuberculosis infection treated at Singapore General Hospital.
Background: - Lymphatic filariasis is an infection that is caused by small, thread-like worms. It is spread by mosquitoes, and causes fever, chills, and headaches. If untreated, it can also cause elephantiasis, a condition that leads to swelling of the arms, legs, breasts, and scrotum. Treatment can eliminate the worms from the blood and reduce the risk of developing elephantiasis. Researchers want to study people with latent tuberculosis (TB) who may or may not be infected with filariasis. This study will look at the way that people with latent TB fight infection with these worms. Objectives: - To study how the immune systems of people with latent TB react to filarial infection. Eligibility: - Individuals between 18 and 65 years of age who have latent TB and may or may not have filarial infection. Design: - Participants will be screened with a physical exam and medical history. They will provide a blood and stool sample to test for infection. - Participants who do not have lymphatic filariasis but have another kind of intestinal worm will be treated for the parasite. This will be their last study visit. - Participants who have latent TB and lymphatic filariasis will be treated with the standard treatment for the disease. They will come back for a second visit 6 months later, and will provide another blood sample.