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Showing 1–24 of 68 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Encephalitis, Viral Clear all
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 22, 2026, 5:19 PM EDT
Withdrawn Not applicable Interventional

Hepatic Encephalopathy: Lactulose or Polyethylene Glycol (H.E.L.P.)

NCT01923376
View directory record Official record
Conditions
Hepatic Encephalopathy, HE, Cirrhosis, Altered Mental Status, AMS
Interventions
Lactulose, Polyethylene Glycol 3350
Drug
Lead sponsor
New York Presbyterian Brooklyn Methodist Hospital
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated May 11, 2015 · Synced Jul 22, 2026, 5:19 PM EDT
Completed Not applicable Interventional

A Pilot Study of Oral Clindamycin and Pyrimethamine for the Treatment of Toxoplasmic Encephalitis in Patients With AIDS

NCT00000674
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Pyrimethamine, Leucovorin calcium, Clindamycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1992
U.S. locations
13
States / cities
Los Angeles, California • Palo Alto, California • San Diego, California + 8 more
Source: ClinicalTrials.gov public record
Updated May 17, 2012 · Synced Jul 22, 2026, 5:19 PM 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 22, 2026, 5:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vaccination Trial of a Recombinant MVA-BN-WEV Vaccine in Healthy Adult Subjects

NCT04131595
View directory record Official record
Conditions
Equine Encephalitis
Interventions
MVA-BN-WEV Dose 1, MVA-BN-WEV Dose 2, MVA-BN-WEV Dose 3
Biological
Lead sponsor
Bavarian Nordic
Industry
Eligibility
18 Years to 50 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2020 · Synced Jul 22, 2026, 5:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase I Study of West Nile Virus Vaccine

NCT00300417
View directory record Official record
Conditions
West Nile Fever
Interventions
VRC-WNVDNA020-00-VP
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2007
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 22, 2026, 5:19 PM 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 22, 2026, 5:19 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Safety and Efficacy Study of Two Japanese Encephalitis Vaccines ChimeriVaxTM-JE and JE-VAX

NCT00319592
View directory record Official record
Conditions
Japanese Encephalitis
Interventions
ChimeriVax™-JE vaccine, JE-VAX® vaccine
Biological
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 48 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2012 · Synced Jul 22, 2026, 5:19 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Venezuelan Equine Encephalitis Monovalent Virus-Like Particle Vaccine

NCT03776994
View directory record Official record
Conditions
Encephalitis, Encephalitis, Viral, Infectious Encephalitis, Virus Diseases, Encephalomyelitis, Venezuelan Equine, Brain Diseases, Central Nervous System Diseases, Central Nervous System Viral Diseases, Alphavirus Infections, Togaviridae Infections, RNA Virus Infections, Central Nervous System Infections, Encephalomyelitis, Physiological Effects of Drugs, Vaccines, Encephalomyelitis, Equine, Nervous System Diseases
Interventions
Vaccinations on Day 0, Day 28, and Day 140
Biological
Lead sponsor
SRI International
Industry
Eligibility
18 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Plymouth, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 22, 2021 · Synced Jul 22, 2026, 5:19 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Vaccine to Prevent West Nile Virus Disease

NCT00106769
View directory record Official record
Conditions
Healthy, West Nile Fever, Healthy Volunteer, HV
Interventions
VRC-WNVDNA017-00-VP
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 22, 2026, 5:19 PM EDT
Recruiting Phase 2 Interventional

Intravenous Brincidofovir as an Antiviral for Treatment of Progressive Multifocal Leukoencephalopathy: A Pilot Study

NCT07511049
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
Brincidofovir
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 99 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Jul 22, 2026, 5:19 PM EDT
Completed No phase listed Observational

Role of Inflammation in Progressive Multifocal Leukoencephalopathy (PML)

NCT01132053
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy
Interventions
Not listed
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 13, 2023 · Synced Jul 22, 2026, 5:19 PM EDT
Completed No phase listed Observational

Procedural Motor Memory in Long COVID-19

NCT05746624
View directory record Official record
Conditions
Infectious Metabolic Encephalopathy, Ischemic Stroke, Seizure, Viral Encephalitis, Small and Large Vessel
Interventions
keypresses
Behavioral
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 90 Years
Enrollment
333 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 29, 2025 · Synced Jul 22, 2026, 5:19 PM EDT
Terminated No phase listed Observational

Prevalence of Pathogens in Cerebrospinal Fluid Obtained From Emergency Department Patients

NCT02207647
View directory record Official record
Conditions
Meningoencephalitis, Other Syndromes Requiring Lumbar Puncture in Emergency Department
Interventions
no intervention
Other
Lead sponsor
Olive View-UCLA Education & Research Institute
Other
Eligibility
3 Months and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
Sylmar, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2022 · Synced Jul 22, 2026, 5:19 PM 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 22, 2026, 5:19 PM EDT
Completed Phase 1 Interventional

A Study of Azithromycin Plus Pyrimethamine in the Treatment of a Brain Infection in Patients With AIDS

NCT00000966
View directory record Official record
Conditions
Toxoplasmosis, Cerebral, HIV Infections
Interventions
Azithromycin, Pyrimethamine, Leucovorin calcium
Drug
Lead sponsor
Pfizer
Industry
Eligibility
13 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
11
States / cities
Los Angeles, California • Miami, Florida • Worcester, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2008 · Synced Jul 22, 2026, 5:19 PM EDT
Completed No phase listed Observational

Impact of Obesity on Clinical Outcomes in Patients Receiving Acyclovir for HSV Encephalitis"

NCT05127395
View directory record Official record
Conditions
HSV Encephalitis
Interventions
To assess the clinical impact of dosing acyclovir based on IBW or adjBW for HSV encephalitis to definitively guide safe and effective therapy.
Other
Lead sponsor
Methodist Health System
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 22, 2026 · Synced Jul 22, 2026, 5:19 PM 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 22, 2026, 5:19 PM EDT
Recruiting Phase 1 Interventional

Prophylactic Antibiotics Useful With Antibiotic Impregnated External Ventricular Drains (EVDs)?

NCT05001750
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Intracerebral Hemorrhage, Ventriculitis, Cerebral, Hydrocephalus
Interventions
Long term (continuous) prophylactic antibiotics, 24 hours antibiotics
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2026 · Synced Jul 22, 2026, 5:19 PM 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 22, 2026, 5:19 PM EDT
Recruiting Phase 2 Interventional

Cytotoxic T Lymphocytes in Treating Patients With Malignancies With BK and/or JC Virus

NCT02479698
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, BK Virus Infection, Human Immunodeficiency Virus, JC Virus Infection, Malignant Neoplasm, Merkel Cell Carcinoma, Merkel Cell Polyomavirus Infection, Viral Encephalitis
Interventions
Allogeneic BK-specific Cytotoxic T-lymphocytes, Laboratory Biomarker Analysis
Biological · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Jul 22, 2026, 5:19 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Safety and Immunogenicity of ChimeriVax-WN02 West Nile Vaccine in Healthy Adults

NCT00442169
View directory record Official record
Conditions
West Nile Fever
Interventions
ChimeriVax-WN02 Low Dose, ChimeriVax-WN02 Medium Dose, ChimeriVax-WN02 High Dose, 0.9% Saline solution, 0.9 % NaCl solution
Biological
Lead sponsor
Sanofi Pasteur, a Sanofi Company
Industry
Eligibility
18 Years and older
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
5
States / cities
Phoenix, Arizona • Idaho Falls, Idaho • Lenexa, Kansas + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2016 · Synced Jul 22, 2026, 5:19 PM EDT
Recruiting No phase listed Observational

Lupus Landmark Study: A Prospective Registry and Biorepository

NCT05934149
View directory record Official record
Conditions
Systemic Lupus Erythematosus (SLE), Lupus Nephritis, Neuropsychiatric Systemic Lupus Erythematosus
Interventions
Not listed
Lead sponsor
Lupus Research Alliance
Other
Eligibility
18 Years to 110 Years
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2035
U.S. locations
19
States / cities
Birmingham, Alabama • Tucson, Arizona • Beverly Hills, California + 15 more
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Jul 22, 2026, 5:19 PM EDT
Recruiting Phase 1 Interventional

Central Nervous System Uptake of Anti-CD8+ T Cell Minibodies in Multiple Sclerosis and Progressive Multifocal Leukoencephalopathy

NCT05849467
View directory record Official record
Conditions
Progressive Multifocal Leukoencephalopathy, Multiple Sclerosis, Other Neuroinflammatory Diseases With BBB Leakage
Interventions
89 Zr-Df-crefmirlimab
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years to 120 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jul 22, 2026, 5:19 PM EDT