Cryptococcal InfectionNCT00001352
Fungal Infection Susceptibility
An observational study of Cryptococcal Infection and Cryptococcal Pneumonia, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.
Trial summary
The protocol will be carried out in accordance with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) and the following United States Code of Federal Regulations (CFR) applicable to clinical studies: 45 CFR Part 46, 21 CFR Part 50, 21… Read more about this study
- Who is it for?
- Ages 18 to 99 yearsHealthy volunteers can take part
- Conditions the study is for
- Cryptococcal Infection, Cryptococcal Pneumonia, Pulmonary Cryptococcosis
- Type of treatment
- Injection or infusion
- How many people
- 800 participants
- Where
- 1 siteUnited States
- Study dates
- 1 Apr 1993to not given
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 99 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Study subjects will consist of previously healthy adults without known prior conditions who have cryptococcosis, blood relatives of these patients, and healthy adult volunteers. Potential Cryptococcus patients must be 18 or older with evidence of positive Cryptococcus infection results as shown through their medical records, telephone interviews or referring physician. This includes a positive Cryptococcus culture (neoformans or gattii), a positive cryptococcal antigen from serum or CSF with CSF cell count and chemistry consistent with Cryptococcus infection, or histopathology showing cryptococci. Blood relatives and healthy volunteers must be 18 years or older.
Who may be able to join
- Patients
- Patients must:
- Have cryptococcosis as determined by information collected from their medical records, telephone interviews, or from a referring physician:
- histopathology showing cryptococci; or
- culture of C. neoformans or C. gattii
- a positive cryptococcal antigen in the serum and/or CSF, together with CSF cell count and chemistry consistent with cryptococcal meningitis.
Show all 21Show fewer
- Be over the age of 18 years old.
- Have a primary physician outside of the NIH.
- Agree to undergo genetic testing that will include WES and high density SNP arrays as appropriate for possible WES linkage studies.
- Allow samples to be stored for future research.
- Pregnant patients will not be excluded. However, research procedures greater than minimal risk including bone marrow biopsy and apheresis would not be performed on pregnant subjects. Otherwise, pregnant patients with cryptococcus would be treated with as per standard of care, minimizing teratogenic potential of drugs and ionizing radiation whenever possible.
- Blood Relatives of Patients
- Blood relatives must:
- Be a genetic relative of a patient enrolled in this study
- Be over the age of 18 years old
- Agree to undergo genetic testing that may include WES and high density SNP analysis
- Allow samples to be stored for future research
- Healthy Volunteers
- Healthy volunteers must:
- Be between the ages of 18 and 70 years old
- Allow samples to be stored for future research
Who cannot join
- Patients
- Patients will be excluded for any of the following:
- The presence of certain types of acquired abnormalities of immunity due to:
- HIV
- Cancer chemotherapeutic agent(s)
- An underlying malignancy could be grounds for possible exclusion of a patient if, in the opinion of the investigator, the underlying disease predisposed the patient to the infection
Show all 21Show fewer
- Monoclonal antibody therapy directed against a patient s immune system
- Any condition that in the opinion of the investigator may interfere with the evaluation of a co-existing abnormality of immunity that is the subject of study under this protocol. For example, we may exclude patients with Cushing s disease that have very high cortisol levels at the time of diagnosis of their cryptococcosis.
- Genetic Relatives of Patients
- Genetic relatives will be excluded for the following:
- -Any condition that in the opinion of the investigator may interfere with evaluation of an immune system abnormality that is the subject of study under this protocol.
- Healthy Volunteers
- Healthy volunteers will be excluded for any of the following:
- HIV or viral hepatitis (B or C).
- History of recurrent or severe infections.
- History of intravenous drug use.
- History of engaging in high-risk activities for exposure to HIV.
- Receiving chemotherapeutic agent(s), immunosuppressants or have underlying malignancy.
- Pregnancy.
- Have history of heart, lung, kidney disease, or bleeding disorders.
- Any condition that in the opinion of the investigator may interfere with evaluation of an immune system abnormality that is the subject of study under this protocol.
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
United States1 site, 1 recruiting
- Recruiting
National Institutes of Health Clinical Center
Bethesda, Maryland, 20892
Peter Williamson, MD PhD, 301-273-5056, peter.williamson2@nih.gov
Tracey-Ann Hoeltermann, (240) 344-8127, tracey-ann.hoeltermann@nih.gov
About this study
Official title: Cryptococcosis in Previously Healthy Adults
The protocol will be carried out in accordance with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) and the following United States Code of Federal Regulations (CFR) applicable to clinical studies: 45 CFR Part 46, 21 CFR Part 50, 21 CFR Part 56, 21 CFR Part 312, and/or 21 CFR Part 812.
NIH-funded investigators and study site staff who are responsible for the conduct, management, or oversight of NIH-funded studies have completed Human Subjects Protection and ICH GCP Training.
The protocol, informed consent form(s), recruitment materials, and all participant materials will be submitted to the Institutional Review Board (IRB) for review and approval. Approval of both the protocol and the consent form must be obtained before any participant is enrolled. Any amendment to the protocol will require review and approval by the IRB before the changes are implemented to the study. In addition, all changes to the consent form will be approved by the IRB; an IRB determination will be made regarding whether a new consent needs to be obtained from participants who provided consent, using a previously approved consent form.
Read the detailed description
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 percent to 17.9 percent 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 various sampling procedures, including saliva, blood, eyebrow hair, CSF, and nail clipping collection. 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, saliva samples, CSF samples, and eyebrow hair samples for research testing. Moreover, with respect to cryptococcosis, patients with isolated non-central nervous system (CNS) disease (e.g., pulmonary) may serve as a subset comparator to those with 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.
- Conditions
- Cryptococcal Infection, Cryptococcal Pneumonia, Pulmonary Cryptococcosis, Cryptococcal Meningitis, Cryptococcosis
- Keywords
- Natural History, Cryptococcus, Cryptococcus Neoformans, Cryptococcus gattii
- Medical subject headings
- Meningitis, Cryptococcal, Cryptococcosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Blood Relatives | Will be placed in a control group. Must be a blood relative of a patient enrolled in the study. Participant age must be 18 years or older. Relatives may be excluded if they have a condition that may interfere with evaluation of an immune system abnormality. | |
| Healthy Volunteers | Will be placed in a control group. Participant age must be 18 years or older. Healthy volunteers will be excluded if they have HIV, viral hepatitis (B or C), history of recurrent or severe infections, history of intravenous drug use, history of engaging in high-risk activities for HIV exposure, receiving chemotherapeutic agents, immunosuppressants, have underlying malignancies, pregnancy, or a history of heart disease, lung disease, kidney disease, or bleeding disorders. | |
| Patient Population | Previously healthy adult patients diagnosed with Cryptococcosis and have no predisposing conditions, such as HIV. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Characterize the full spectrum of clinical disease of Cryptococcosis in previously healthy adults without known immune predisposition.
Measured: 1-5 years
Secondary outcomes (3)
Characterize the immunological and genetic mechanisms predisposing to disease acquisition.
Measured: 1-5 years
Understand the inflammatory response and distinguish its consequences from those directly due to fungal growth.
Measured: 1-5 years
Understand the natural history of disease progression or regression over time.
Measured: 1-5 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Nov 1999 (estimated)
- Study start1 Apr 1993
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (15)Papers the sponsor has linked to this study.
- Other trials for Cryptococcal InfectionStudies of the same condition, open and under way.
- More trials run by National Institute of Allergy and Infectious Diseases (NIAID)The sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 800 participants (estimated)
Sponsor and investigators
- Sponsor type
- US National Institutes of Health
- Responsible party
- Sponsor
- Investigators
- Peter R Williamson, M.D., Principal investigator, National Institute of Allergy and Infectious Diseases (NIAID)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00001352
- Sponsor's protocol ID
- 930106
- Other IDs
- 93-I-0106
- Status last verified
- 8 Sep 2026
- First submitted
- 3 Nov 1999
- Last updated
- 5 Nov 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Baddley JW, Forrest GN; AST Infectious Diseases Community of Practice. Cryptococcosis in solid organ transplantation. Am J Transplant. 2013 Mar;13 Suppl 4:242-9. doi: 10.1111/ajt.12116. No abstract available.
PubMed 23465017Park BJ, Wannemuehler KA, Marston BJ, Govender N, Pappas PG, Chiller TM. Estimation of the current global burden of cryptococcal meningitis among persons living with HIV/AIDS. AIDS. 2009 Feb 20;23(4):525-30. doi: 10.1097/QAD.0b013e328322ffac.
PubMed 19182676Perfect JR, Dismukes WE, Dromer F, Goldman DL, Graybill JR, Hamill RJ, Harrison TS, Larsen RA, Lortholary O, Nguyen MH, Pappas PG, Powderly WG, Singh N, Sobel JD, Sorrell TC. Clinical practice guidelines for the management of cryptococcal disease: 2010 update by the infectious diseases society of america. Clin Infect Dis. 2010 Feb 1;50(3):291-322. doi: 10.1086/649858.
PubMed 20047480Brizendine KD, Baddley JW, Pappas PG. Predictors of mortality and differences in clinical features among patients with Cryptococcosis according to immune status. PLoS One. 2013;8(3):e60431. doi: 10.1371/journal.pone.0060431. Epub 2013 Mar 26.
PubMed 23555970Bratton EW, El Husseini N, Chastain CA, Lee MS, Poole C, Sturmer T, Juliano JJ, Weber DJ, Perfect JR. Comparison and temporal trends of three groups with cryptococcosis: HIV-infected, solid organ transplant, and HIV-negative/non-transplant. PLoS One. 2012;7(8):e43582. doi: 10.1371/journal.pone.0043582. Epub 2012 Aug 24.
PubMed 22937064Gullo FP, Rossi SA, Sardi Jde C, Teodoro VL, Mendes-Giannini MJ, Fusco-Almeida AM. Cryptococcosis: epidemiology, fungal resistance, and new alternatives for treatment. Eur J Clin Microbiol Infect Dis. 2013 Nov;32(11):1377-91. doi: 10.1007/s10096-013-1915-8. Epub 2013 Jul 4.
PubMed 24141976Baddley JW, Perfect JR, Oster RA, Larsen RA, Pankey GA, Henderson H, Haas DW, Kauffman CA, Patel R, Zaas AK, Pappas PG. Pulmonary cryptococcosis in patients without HIV infection: factors associated with disseminated disease. Eur J Clin Microbiol Infect Dis. 2008 Oct;27(10):937-43. doi: 10.1007/s10096-008-0529-z. Epub 2008 May 1.
PubMed 18449582Chen SC, Korman TM, Slavin MA, Marriott D, Byth K, Bak N, Currie BJ, Hajkowicz K, Heath CH, Kidd S, McBride WJ, Meyer W, Murray R, Playford EG, Sorrell TC; Australia and New Zealand Mycoses Interest Group (ANZMIG) Cryptococcus Study. Antifungal therapy and management of complications of cryptococcosis due to Cryptococcus gattii. Clin Infect Dis. 2013 Aug;57(4):543-51. doi: 10.1093/cid/cit341. Epub 2013 May 22.
PubMed 23697747Pappas PG. Cryptococcal infections in non-HIV-infected patients. Trans Am Clin Climatol Assoc. 2013;124:61-79.
PubMed 23874010Meletiadis J, Walsh TJ, Choi EH, Pappas PG, Ennis D, Douglas J, Pankey GA, Larsen RA, Hamill RJ, Chanock S. Study of common functional genetic polymorphisms of FCGR2A, 3A and 3B genes and the risk for cryptococcosis in HIV-uninfected patients. Med Mycol. 2007 Sep;45(6):513-8. doi: 10.1080/13693780701390140.
PubMed 17710620Schepelmann K, Muller F, Dichgans J. Cryptococcal meningitis with severe visual and hearing loss and radiculopathy in a patient without immunodeficiency. Mycoses. 1993 Nov-Dec;36(11-12):429-32. doi: 10.1111/j.1439-0507.1993.tb00734.x.
PubMed 7935577Rosen LB, Freeman AF, Yang LM, Jutivorakool K, Olivier KN, Angkasekwinai N, Suputtamongkol Y, Bennett JE, Pyrgos V, Williamson PR, Ding L, Holland SM, Browne SK. Anti-GM-CSF autoantibodies in patients with cryptococcal meningitis. J Immunol. 2013 Apr 15;190(8):3959-66. doi: 10.4049/jimmunol.1202526. Epub 2013 Mar 18.
PubMed 23509356Rabbani B, Tekin M, Mahdieh N. The promise of whole-exome sequencing in medical genetics. J Hum Genet. 2014 Jan;59(1):5-15. doi: 10.1038/jhg.2013.114. Epub 2013 Nov 7.
PubMed 24196381Mullaney JM, Mills RE, Pittard WS, Devine SE. Small insertions and deletions (INDELs) in human genomes. Hum Mol Genet. 2010 Oct 15;19(R2):R131-6. doi: 10.1093/hmg/ddq400. Epub 2010 Sep 21.
PubMed 20858594De Pauw B, Walsh TJ, Donnelly JP, Stevens DA, Edwards JE, Calandra T, Pappas PG, Maertens J, Lortholary O, Kauffman CA, Denning DW, Patterson TF, Maschmeyer G, Bille J, Dismukes WE, Herbrecht R, Hope WW, Kibbler CC, Kullberg BJ, Marr KA, Munoz P, Odds FC, Perfect JR, Restrepo A, Ruhnke M, Segal BH, Sobel JD, Sorrell TC, Viscoli C, Wingard JR, Zaoutis T, Bennett JE; European Organization for Research and Treatment of Cancer/Invasive Fungal Infections Cooperative Group; National Institute of Allergy and Infectious Diseases Mycoses Study Group (EORTC/MSG) Consensus Group. Revised definitions of invasive fungal disease from the European Organization for Research and Treatment of Cancer/Invasive Fungal Infections Cooperative Group and the National Institute of Allergy and Infectious Diseases Mycoses Study Group (EORTC/MSG) Consensus Group. Clin Infect Dis. 2008 Jun 15;46(12):1813-21. doi: 10.1086/588660.
PubMed 18462102
Study at a glance
From the registry record, last updated by the sponsor on 5 Nov 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Cryptococcosis in Previously Healthy Adults
- ClinicalTrials.gov ID
- NCT00001352
- Acronym / sponsor ID
- 930106
- Conditions
- Cryptococcal Infection, Cryptococcal Pneumonia, Pulmonary Cryptococcosis, Cryptococcal Meningitis, Cryptococcosis
- Keywords
- Natural History, Cryptococcus, Cryptococcus Neoformans, Cryptococcus gattii
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 800 participants (estimated)
- Lead sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)US National Institutes of Health
- Study start
- 1 Apr 1993 (actual)
- First posted
- 4 Nov 1999 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The protocol will be carried out in accordance with International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) Good Clinical Practice (GCP) and the following United States Code of Federal Regulations (CFR) applicable to clinical studies: 45 CFR Part 46, 21 CFR Part 50, 21 CFR Part 56, 21 CFR Part 312, and/or 21 CFR Part 812.
NIH-funded investigators and study site staff who are responsible for the conduct, management, or oversight of NIH-funded studies have completed Human Subjects Protection and ICH GCP Training.
The protocol, informed consent form(s), recruitment materials, and all participant materials will be submitted to the Institutional Review Board (IRB) for review and approval. Approval of both the protocol and the consent form must be obtained before any participant is enrolled. Any amendment to the protocol will require review and approval by the IRB before the changes are implemented to the study. In addition, all changes to the consent form will be approved by the IRB; an IRB determination will be made regarding whether a new consent needs to be obtained from participants who provided consent, using a previously approved consent form.
Detailed description
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 percent to 17.9 percent 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 various sampling procedures, including saliva, blood, eyebrow hair, CSF, and nail clipping collection. 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, saliva samples, CSF samples, and eyebrow hair samples for research testing. Moreover, with respect to cryptococcosis, patients with isolated non-central nervous system (CNS) disease (e.g., pulmonary) may serve as a subset comparator to those with 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 design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Blood Relatives | – | –Will be placed in a control group. Must be a blood relative of a patient enrolled in the study. Participant age must be 18 years or older. Relatives may be excluded if they have a condition that may interfere with evaluation of an immune system abnormality. |
| Healthy Volunteers | – | –Will be placed in a control group. Participant age must be 18 years or older. Healthy volunteers will be excluded if they have HIV, viral hepatitis (B or C), history of recurrent or severe infections, history of intravenous drug use, history of engaging in high-risk activities for HIV exposure, receiving chemotherapeutic agents, immunosuppressants, have underlying malignancies, pregnancy, or a history of heart disease, lung disease, kidney disease, or bleeding disorders. |
| Patient Population | – | –Previously healthy adult patients diagnosed with Cryptococcosis and have no predisposing conditions, such as HIV. |
Who may qualify
- Ages
- 18 to 99 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Study subjects will consist of previously healthy adults without known prior conditions who have cryptococcosis, blood relatives of these patients, and healthy adult volunteers. Potential Cryptococcus patients must be 18 or older with evidence of positive Cryptococcus infection results as shown through their medical records, telephone interviews or referring physician. This includes a positive Cryptococcus culture (neoformans or gattii), a positive cryptococcal antigen from serum or CSF with CSF cell count and chemistry consistent with Cryptococcus infection, or histopathology showing cryptococci. Blood relatives and healthy volunteers must be 18 years or older.
Key inclusion criteria (21 listed)
- Patients
- Have cryptococcosis as determined by information collected from their medical records, telephone interviews, or from a referring physician:
- Be over the age of 18 years old.
- Have a primary physician outside of the NIH.
- Agree to undergo genetic testing that will include WES and high density SNP arrays as appropriate for possible WES linkage studies.
Key exclusion criteria (21 listed)
- Patients
- The presence of certain types of acquired abnormalities of immunity due to:
- Any condition that in the opinion of the investigator may interfere with the evaluation of a co-existing abnormality of immunity that is the subject of study under this protocol. For example, we may exclude patients with Cushing s disease that have very high cortisol levels at the time of diagnosis of their cryptococcosis.
- Genetic Relatives of Patients
- -Any condition that in the opinion of the investigator may interfere with evaluation of an immune system abnormality that is the subject of study under this protocol.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Characterize the full spectrum of clinical disease of Cryptococcosis in previously healthy adults without known immune predisposition.
Time frame: 1-5 years
3 secondary outcomes
Characterize the immunological and genetic mechanisms predisposing to disease acquisition.
Time frame: 1-5 years
Understand the inflammatory response and distinguish its consequences from those directly due to fungal growth.
Time frame: 1-5 years
Understand the natural history of disease progression or regression over time.
Time frame: 1-5 years
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Nov 2026.
- Background: PubMed 23465017Baddley JW, Forrest GN; AST Infectious Diseases Community of Practice. Cryptococcosis in solid organ transplantation. Am J Transplant. 2013 Mar;13 Suppl 4:242-9. doi: 10.1111/ajt.12116. No abstract available.
- Background: PubMed 19182676Park BJ, Wannemuehler KA, Marston BJ, Govender N, Pappas PG, Chiller TM. Estimation of the current global burden of cryptococcal meningitis among persons living with HIV/AIDS. AIDS. 2009 Feb 20;23(4):525-30. doi: 10.1097/QAD.0b013e328322ffac.
- Background: PubMed 20047480Perfect JR, Dismukes WE, Dromer F, Goldman DL, Graybill JR, Hamill RJ, Harrison TS, Larsen RA, Lortholary O, Nguyen MH, Pappas PG, Powderly WG, Singh N, Sobel JD, Sorrell TC. Clinical practice guidelines for the management of cryptococcal disease: 2010 update by the infectious diseases society of america. Clin Infect Dis. 2010 Feb 1;50(3):291-322. doi: 10.1086/649858.
- Background: PubMed 23555970Brizendine KD, Baddley JW, Pappas PG. Predictors of mortality and differences in clinical features among patients with Cryptococcosis according to immune status. PLoS One. 2013;8(3):e60431. doi: 10.1371/journal.pone.0060431. Epub 2013 Mar 26.
- Background: PubMed 22937064Bratton EW, El Husseini N, Chastain CA, Lee MS, Poole C, Sturmer T, Juliano JJ, Weber DJ, Perfect JR. Comparison and temporal trends of three groups with cryptococcosis: HIV-infected, solid organ transplant, and HIV-negative/non-transplant. PLoS One. 2012;7(8):e43582. doi: 10.1371/journal.pone.0043582. Epub 2012 Aug 24.
- Background: PubMed 24141976Gullo FP, Rossi SA, Sardi Jde C, Teodoro VL, Mendes-Giannini MJ, Fusco-Almeida AM. Cryptococcosis: epidemiology, fungal resistance, and new alternatives for treatment. Eur J Clin Microbiol Infect Dis. 2013 Nov;32(11):1377-91. doi: 10.1007/s10096-013-1915-8. Epub 2013 Jul 4.
- Background: PubMed 18449582Baddley JW, Perfect JR, Oster RA, Larsen RA, Pankey GA, Henderson H, Haas DW, Kauffman CA, Patel R, Zaas AK, Pappas PG. Pulmonary cryptococcosis in patients without HIV infection: factors associated with disseminated disease. Eur J Clin Microbiol Infect Dis. 2008 Oct;27(10):937-43. doi: 10.1007/s10096-008-0529-z. Epub 2008 May 1.
- Background: PubMed 23697747Chen SC, Korman TM, Slavin MA, Marriott D, Byth K, Bak N, Currie BJ, Hajkowicz K, Heath CH, Kidd S, McBride WJ, Meyer W, Murray R, Playford EG, Sorrell TC; Australia and New Zealand Mycoses Interest Group (ANZMIG) Cryptococcus Study. Antifungal therapy and management of complications of cryptococcosis due to Cryptococcus gattii. Clin Infect Dis. 2013 Aug;57(4):543-51. doi: 10.1093/cid/cit341. Epub 2013 May 22.
- Background: PubMed 23874010Pappas PG. Cryptococcal infections in non-HIV-infected patients. Trans Am Clin Climatol Assoc. 2013;124:61-79.
- Background: PubMed 17710620Meletiadis J, Walsh TJ, Choi EH, Pappas PG, Ennis D, Douglas J, Pankey GA, Larsen RA, Hamill RJ, Chanock S. Study of common functional genetic polymorphisms of FCGR2A, 3A and 3B genes and the risk for cryptococcosis in HIV-uninfected patients. Med Mycol. 2007 Sep;45(6):513-8. doi: 10.1080/13693780701390140.
- Background: PubMed 7935577Schepelmann K, Muller F, Dichgans J. Cryptococcal meningitis with severe visual and hearing loss and radiculopathy in a patient without immunodeficiency. Mycoses. 1993 Nov-Dec;36(11-12):429-32. doi: 10.1111/j.1439-0507.1993.tb00734.x.
- Background: PubMed 23509356Rosen LB, Freeman AF, Yang LM, Jutivorakool K, Olivier KN, Angkasekwinai N, Suputtamongkol Y, Bennett JE, Pyrgos V, Williamson PR, Ding L, Holland SM, Browne SK. Anti-GM-CSF autoantibodies in patients with cryptococcal meningitis. J Immunol. 2013 Apr 15;190(8):3959-66. doi: 10.4049/jimmunol.1202526. Epub 2013 Mar 18.
- NIH Clinical Center Detailed Web PageLink provided by the sponsor.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Peter R Williamson, M.D. principal investigator
National Institute of Allergy and Infectious Diseases (NIAID)
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cryptococcal Infection and Cryptococcal Pneumonia, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 21 inclusion and 21 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 5 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Peter R Williamson, M.D. ((301) 443-8339, williamsonpr@mail.nih.gov), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Characterize the full spectrum of clinical disease of Cryptococcosis in previously healthy adults without known immune predisposition. (time frame: 1-5 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00001352, which also lists 15 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Nov 2026.