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Showing 1–24 of 64 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Infectious Encephalitis Clear all
Completed Early Phase 1 Interventional

NT-I7, a Long-Acting Recombinant IL-7 Molecule, as an Immune Reconstitution Strategy for Lymphopenia in Patients With Progressive Multifocal Leukoencephalopathy

NCT04781309
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
NT-I7
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 120 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 17, 2025 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of and Immune Response to a West Nile Virus Vaccine (WN/DEN4-3'delta30) in Healthy Adults

NCT00094718
View directory record Official record
Conditions
West Nile Fever Encephalitis
Interventions
WN/DEN4-3'delta30, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005
U.S. locations
2
States / cities
Baltimore, Maryland • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 2, 2013 · Synced Jul 24, 2026, 1:08 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Natural History Study of Progressive Multifocal Leukoencephalopathy (PML)

NCT01730131
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
2 Years to 120 Years
Enrollment
700 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2012
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Jul 24, 2026, 1:08 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Vaccine Study for Tick-Borne Encephalitis Virus (TBEV)

NCT01031537
View directory record Official record
Conditions
Tick-Borne Encephalitis, Encephalitis, Tick-Borne, Tick-Borne Disease, Glycoprotein E, Flavivirus, NSI Protein, Flavivirus
Interventions
FSME-IMMUN 0.5ml Baxter
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 100 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
2
States / cities
Bethesda, Maryland • Hamilton, Montana
Source: ClinicalTrials.gov public record
Updated Jul 4, 2018 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity Study of ChimeriVax West Nile Vaccine in Healthy Adults

NCT00746798
View directory record Official record
Conditions
West Nile Fever
Interventions
ChimeriVax-WN02 vaccine, Placebo
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
50 Years and older
Enrollment
479 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
15
States / cities
Anaheim, California • Colorado Springs, Colorado • South Miami, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Apr 2, 2015 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Not applicable Interventional

A Randomized Prospective Study of Pyrimethamine Therapy for Prevention of Toxoplasmic Encephalitis in HIV-Infected Individuals With Serologic Evidence of Latent Toxoplasma Gondii Infection

NCT00000666
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Pyrimethamine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1992
U.S. locations
16
States / cities
San Francisco, California • Denver, Colorado • New Haven, Connecticut + 11 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2012 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of and Immune Response to a West Nile Virus Vaccine (WN/DEN4delta30) in Healthy Adults

NCT00537147
View directory record Official record
Conditions
West Nile Fever
Interventions
WN/DEN4delta30 vaccine, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 2, 2013 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Not applicable Interventional

A Pilot Study of 566C80 for the Salvage Treatment of Toxoplasmic Encephalitis in Patients Infected With the Human Immunodeficiency Virus (HIV) Who Have Failed or Are Intolerant of Pyrimethamine-Sulfadiazine

NCT00001994
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Atovaquone
Drug
Lead sponsor
Glaxo Wellcome
Industry
Eligibility
13 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
18
States / cities
Los Angeles, California • Oakland, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 24, 2026, 1:08 AM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

SV2A & TSPO PET Imaging Measures to Reveal Mechanisms of HIV Neuropathogenesis During Antiretroviral Therapy

NCT05586581
View directory record Official record
Conditions
HIV Associated Neurocognitive Disorder, HIV Dementia, HIV Encephalitis, Healthy
Interventions
SV2A PET, TSPO PET
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 80 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2030
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Jul 24, 2026, 1:08 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity Study of the Venezuelan Equine Encephalomyelitis Vaccine

NCT00582504
View directory record Official record
Conditions
Venezuelan Equine Encephalomyelitis
Interventions
VEE TC-83
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2022
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 10, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional

A Study of Pyrimethamine in the Treatment of Infection by a Certain Parasite in HIV-Positive Patients

NCT00000973
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Pyrimethamine, Leucovorin calcium, Zidovudine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1995
U.S. locations
2
States / cities
New York, New York • Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Completed No phase listed Observational Results available

Evaluation of Moderate to Severe Influenza Outcomes in Children

NCT02979626
View directory record Official record
Conditions
Influenza, Otitis Media, Lower Resp Tract Infection, Encephalitic Infection, Myositis Viral, Fever
Interventions
Respiratory nasal swab
Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
6 Months to 8 Years
Enrollment
1,478 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
2
States / cities
Aurora, Colorado • Broomfield, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 3, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity Study of the Western Equine Encephalitis (WEE) Vaccine

NCT02466750
View directory record Official record
Conditions
Western Equine Encephalitis
Interventions
Western Equine Encephalitis (WEE) Vaccine
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 10, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of and Immune Response to a Tick-Borne Encephalitis Vaccine (LGT(TP21)/DEN4) in Healthy Adults

NCT00118924
View directory record Official record
Conditions
Tick-Borne Encephalitis
Interventions
LGT(TP21)/DEN4, Placebo
Biological
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 20, 2008 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Not applicable Interventional

Toxoplasmic Encephalitis in Patients With AIDS. Treatment and Prevention of Relapse

NCT00002064
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Pyrimethamine, Clindamycin
Drug
Lead sponsor
Palo Alto Medical Foundation
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity Study of Eastern Equine Encephalitis (EEE) Vaccine

NCT00584805
View directory record Official record
Conditions
Eastern Equine Encephalitis
Interventions
Inactivated, Dried, TSI-GSD 104, EEE
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
138 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2017
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 23, 2019 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

VRC 313: A Trivalent Virus-like Particle (VLP) Encephalitis Vaccine (WEVEE) in Healthy Adults

NCT03879603
View directory record Official record
Conditions
Venezuelan Equine Encephalitis, Western Equine Encephalitis, Eastern Equine Encephalitis, Alphavirus Infections
Interventions
VRC-WEVVLP073-00-VP, VRC-GENMIX083-AL-VP
Biological · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 23, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Control of Leukocyte Function

NCT03027232
View directory record Official record
Conditions
Inflammation, Brain
Interventions
No intervention (drugs) will be given. Purpose: collecting blood for in vitro studies
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2018 · Synced Jul 24, 2026, 1:08 AM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Safety and Immunogenicity of Venezuelan Equine Encephalomyelitis Vaccine (VEE C-84) as a Booster to VEE TC-83

NCT00582088
View directory record Official record
Conditions
Venezuelan Equine Encephalomyelitis
Interventions
VEE C-84
Biological
Lead sponsor
U.S. Army Medical Research and Development Command
Federal
Eligibility
18 Years to 65 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2021
U.S. locations
1
States / cities
Fort Deterick, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 10, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 2 Interventional

Comparison of Anti HIV Drugs Used Alone or in Combination With Cytosine Arabinoside to Treat Progressive Multifocal Leukoencephalopathy (PML) in HIV-Infected Patients

NCT00001048
View directory record Official record
Conditions
HIV Infections, Leukoencephalopathy, Progressive Multifocal
Interventions
Filgrastim, Cytarabine, Zidovudine, Zalcitabine, Didanosine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1997
U.S. locations
9
States / cities
Aurora, Colorado • Miami, Florida • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Oct 31, 2021 · Synced Jul 24, 2026, 1:08 AM EDT
Terminated Phase 4 Interventional Results available

Corticosteroids for Immune Reconstitution Inflammatory Syndrome (IRIS)

NCT01211665
View directory record Official record
Conditions
Immune Reconstitution Inflammatory Syndrome, Leukoencephalopathy, Progressive Multifocal
Interventions
Methylprednisolone, Prednisolone
Drug
Lead sponsor
Biogen
Industry
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Hastings, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 4, 2014 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 2 Interventional

Safety and Effectiveness of Topotecan HCl to Treat HIV-Infected Patients With AIDS-Related Progressive Multifocal Leukoencephalopathy (PML)

NCT00002395
View directory record Official record
Conditions
HIV Infections, Leukoencephalopathy, Progressive Multifocal
Interventions
Topotecan
Drug
Lead sponsor
SmithKline Beecham
Industry
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
5
States / cities
Los Angeles, California • San Francisco, California • Miami, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study of a DNA-based Venezuelan Equine Encephalitis Virus DNA Vaccine Administered by Electroporation in Healthy Volunteers

NCT01984983
View directory record Official record
Conditions
Venezuelan Equine Encephalitis Virus Infection
Interventions
Venezuelan Equine Encephalitis Virus DNA Vaccine Candidate, 0.9% saline placebo
Biological · Other
Lead sponsor
Ichor Medical Systems Incorporated
Industry
Eligibility
18 Years to 49 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Aug 25, 2015 · Synced Jul 24, 2026, 1:08 AM EDT
Completed Not applicable Interventional Results available

Precision Diagnosis of Acute Infectious Diseases; Neuroinflammatory Cohort

NCT02910037
View directory record Official record
Conditions
Encephalitis, Meningitis
Interventions
mNGS for pathogen detection
Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
1 Minute to 110 Years
Enrollment
214 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
7
States / cities
Davis, California • Los Angeles, California • San Francisco, California + 3 more
Source: ClinicalTrials.gov public record
Updated May 26, 2021 · Synced Jul 24, 2026, 1:08 AM EDT