Evaluation of Treatment for Mycobacterium Avium Complex (MAC) Infection in HIV-Infected Patients
Summary
To assess the feasibility of using culture and staining techniques to quantify tissue Mycobacterium avium Complex (MAC) burden in bone marrow. To correlate and compare changes in MAC bone marrow burden with quantitative MAC blood culture results at baseline and after 4 and 8 weeks of treatment.
MAC is easiest to detect in the blood, although doctors generally believe that MAC in blood is just "spill-over" from infection of other parts of the body. Traditionally, studies of potential treatments for MAC focus only on MAC changes in the blood. This study compares MAC changes in blood to those in bone marrow, which is another tissue where MAC is often found.
Description
MAC is easiest to detect in the blood, although doctors generally believe that MAC in blood is just "spill-over" from infection of other parts of the body. Traditionally, studies of potential treatments for MAC focus only on MAC changes in the blood. This study compares MAC changes in blood to those in bone marrow, which is another tissue where MAC is often found.
Patients receive both clarithromycin and ethambutol for 48 weeks; those who become intolerant to the study drugs may receive suggested substitute drugs (azithromycin and rifabutin). Patients receive a bone marrow biopsy at baseline and at either 4 or 8 weeks. Patients are evaluated at weeks 1, 2, 4, 6, 8, 12, 24, 36, and 48.
Study Design
Masking: Open Label, Primary Purpose: Treatment
Conditions
Mycobacterium Avium-Intracellulare Infection
Intervention
Ethambutol hydrochloride, Clarithromycin
Location
Univ of Arizona / Health Science Ctr
Tucson
Arizona
United States
85724
Status
Completed
Source
National Institute of Allergy and Infectious Diseases (NIAID)
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT00001039
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Mycobacterium Avium-intracellulare Infection
A nontuberculous infection when occurring in humans. It is characterized by pulmonary disease, lymphadenitis in children, and systemic disease in AIDS patients. Mycobacterium avium-intracellulare infection of birds and swine results in tuberculosis.
Mycobacterium Avium Complex
A complex that includes several strains of M. avium. M. intracellulare is not easily distinguished from M. avium and therefore is included in the complex. These organisms are most frequently found in pulmonary secretions from persons with a tuberculous-like mycobacteriosis. Strains of this complex have also been associated with childhood lymphadenitis and AIDS; M. avium alone causes tuberculosis in a variety of birds and other animals, including pigs.
Mycobacteria, Atypical
So-called atypical species of the genus MYCOBACTERIUM. They are also called tuberculoid bacilli, i.e.: M. buruli, M. chelonae, M. duvalii, M. flavescens, M. fortuitum, M. gilvum, M. gordonae, M. intracellulare (see MYCOBACTERIUM AVIUM COMPLEX;), M. kansasii, M. marinum, M. obuense, M. scrofulaceum, M. szulgai, M. terrae, M. ulcerans, M. xenopi.
Azithromycin
A semi-synthetic macrolide antibiotic structurally related to ERYTHROMYCIN. It has been used in the treatment of Mycobacterium avium intracellulare infections, toxoplasmosis, and cryptosporidiosis.
Mycobacterium Infections, Atypical
Infections with so called atypical mycobacteria (tuberculoid bacilli): M. kansasii, M. marinum, M. scrofulaceum, M. flavescens, M. gordonae, M. obuense, M. gilvum, M. duvali, M. szulgai, M. intracellulare (see MYCOBACTERIUM AVIUM COMPLEX;), M. xenopi (littorale), M. ulcerans, M. buruli, M. terrae, M. fortuitum (minetti, giae), M. chelonae.
Clinical Trials
To evaluate the efficacy and safety of two different doses of azithromycin in combination with ethambutol for the treatment of patients with Mycobacterium avium complex (MAC) infection, an...
To compare the efficacy of clarithromycin/ethambutol with placebo or with rifabutin at two different doses in reducing colony-forming units (CFUs) by 2 or more logarithms in patients with...
To compare the efficacy and safety of clarithromycin combined with rifabutin, ethambutol, or both in the treatment of disseminated Mycobacterium avium Complex (MAC) disease in persons with...
To compare the safety and efficacy of two doses of clarithromycin in combination with ethambutol and either rifabutin or clofazimine for the treatment of disseminated Mycobacterium avium C...
To optimize Mycobacterium avium Complex (MAC) prophylaxis in AIDS patients by measuring serum rifabutin levels and adjusting the dose accordingly. To combine rifabutin with ethambutol to e...
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