Cryptococcosis in Previously Healthy Adults
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|ClinicalTrials.gov Identifier: NCT00001352|
Recruitment Status : Recruiting
First Posted : November 4, 1999
Last Update Posted : March 29, 2021
This 5-year study will follow the course of disease in previously healthy patients with cryptococcosis who developed the disease for no identifiable reason.
Individuals with a positive culture of Cryptococcus neoformans 18 years of age and older without HIV infection or other condition predisposing to cryptococcosis (such as high-dose corticosteroid therapy, sarcoidosis, or a blood cancer) may be eligible for this study. Candidates who test positive for HIV infection may not participate.
Participants will have a physical examination, medical history, routine blood tests and assessment of disease activity upon entering the study. Patients who may have active cryptococcosis will also have a lumbar puncture (spinal tap) and additional blood tests. Following the initial evaluation, patients receiving treatment for cryptococcosis will come to the NIH Clinical Center as needed to manage their disease, typically no less than every 3 months. Other patients will be seen every 6 to 12 months. The visits will include a medical history, physical examination, and blood and urine tests.
|Condition or disease|
Cryptococcus is a fungus that causes infections most commonly in immunocompromised patients, such as those with AIDS and solid organ transplant recipients, particularly renal transplant recipients (1-3). However, approximately one-third of cases fall outside these groups and, overall, 12.9-17.9% have no readily identifiable immune defect (4, 5). The genetic factors, which may predispose to cryptococcosis and the immune response in these patients, have not been extensively studied.
This protocol is designed to examine the immune deficits that predispose to cryptococcosis as well as the clinical and immune responses among previously healthy adults. The patients included will have an unknown predisposing condition and cryptococcosis. Patients will undergo blood, saliva, and tissue sampling. Throughout the study, patients will be provided with standard medical care and will be seen as often as necessary to manage their condition. Patients in whom microbiologic control of the infection has occurred but in whom inflammation is causing neurologic damage may be treated with corticosteroids or other immunosuppressive agents. Genetically related family members of patients will also be screened for clinical, in vitro, immune, and genetic correlates of immune abnormalities. Healthy adult volunteers, as a comparison group, will be enrolled as a source of blood samples for research testing. Moreover, with respect to cryptococcosis, patients with isolated non-CNS disease (e.g., pulmonary) may serve as a subset comparator to those with central nervous system (CNS) involvement a major tissue tropism for Cryptococcus.
Genetic and immunologic testing will be performed on all subjects (patients, relatives, and healthy volunteers) to evaluate for possible immunogenetic factors that lead to susceptibility to cryptococcosis. Among the aims of this protocol are to better understand the pathophysiology and genetic factors that lead to defects in host defense and to use modern and evolving methods in molecular and cellular biology to elucidate the pathogenesis of this particular susceptibility. A better understanding of the underlying pathophysiology of immune defects and genetic susceptibility to fungal infections could allow for the rational development of novel therapies for such diseases and to benefit future patients.
|Study Type :||Observational|
|Estimated Enrollment :||600 participants|
|Official Title:||Cryptococcosis in Previously Healthy Adults|
|Actual Study Start Date :||April 1, 1993|
Previously healthy patients with cryptococcal meningitis
- Neurologic improvement [ Time Frame: 1-2 years ]Improvement of neurological disability
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00001352
|Contact: Seher H Anjum, M.D.||(240) email@example.com|
|Contact: Peter R Williamson, M.D.||(301) firstname.lastname@example.org|
|United States, Maryland|
|National Institutes of Health Clinical Center, 9000 Rockville Pike||Recruiting|
|Bethesda, Maryland, United States, 20892|
|Contact: For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR) 800-411-1222 ext TTY8664111010 email@example.com|
|Principal Investigator:||Peter R Williamson, M.D.||National Institute of Allergy and Infectious Diseases (NIAID)|