Lyme Disease

15

Review clinical trials related to Lyme Disease. Use filters to narrow results by trial status, phase, treatment, biological sex and sponsor.

Condition / disease
Location
Status: Recruiting

Evaluation, Treatment, and Follow-up of Patients With Lyme Disease

This study is designed to establish a population of patients with Lyme disease for evaluation, treatment and follow-up to learn more about the infection. Patients with active Lyme disease may be eligible for this study. Participants will have a medical history and physical examination and diagnostic evaluations as appropriate to their individual condition. Laboratory tests may include routing blood and urine tests, X-rays, or other imaging studies, body fluid or tissue cultures, skin biopsy and tests for allergic or immune responses. Treatment will include only medications approved by the Food and Drug Administration, given according to accepted dose schedules and ways of taking the medicines. All diagnostic tests and treatments will be according to standard medical practice for the disease. No experimental procedures will be offered under this protocol. Patients will be followed as needed for evaluation and treatment of their condition. In general, they will be asked to return at the end of therapy, then 3, 6 and 12 months later, and then every 6 to 12 months. More frequent visits may be required or less frequent visits may be allowed, depending on the individual s condition. Participants may be asked to undergo the following additional procedures for research purposes: * Extra blood draws to study Lyme disease and other inflammatory conditions. Blood will be drawn from arm veins. The total amount drawn during any 6-week period will not exceed 450 cc (30 tablespoons) for adults and 7 cc (1/2 tablespoon) per kilogram (2.2 pounds) of body weight for children under 18 years of age. * Leukapheresis to collect large numbers of white blood cells. Whole blood is collected through a needle in an arm vein, similar to donating blood. The blood circulates through a machine that separates it into its components, and the white cells are removed. The rest of the blood is returned to the body through the same needle. Only adults 18 years of age and older will be asked to undergo leukapheresis.

Participants needed: 500
Trial details
Age: 2-99Biological sex: AllType: ObservationalSponsor: National Institute of Allergy and Infectious Diseases (NIAID)Updated: Jul 13, 2026Locations: 1
Eligibility criteria

Clinical diagnosis of active Lyme disease at the time of the initial NIH evaluat... [+1]

Post treatment Lyme disease syndrome. [+11]

Status: Recruiting

A Comprehensive Clinical, Microbiological and Immunological Assessment of Patients With Suspected Post Treatment Lyme Disease Syndrome and Selected Control Populations

This study will determine whether patients who have been infected with the Lyme bacteria, Borrelia burgdorferi, and treated with antibiotics still have the bacteria alive inside them and whether it is causing their symptoms. The information from this study may serve as a basis for developing stringent diagnostic criteria for Lyme disease and the establishment of future treatment trials. Individuals in the following categories may be eligible for this study: chronic Lyme disease; chronic Lyme arthritis; seropositive control (are infected with the bacteria that causes Lyme disease but do not have disease symptoms); recovered control (have been sick with Lyme disease but were treated successfully and are currently well); control with multiple sclerosis (patients with multiple sclerosis); and healthy volunteers. Patients in the chronic Lyme disease category must be age 13 and above; all others must be age18 and above. Candidates will be screened with blood and urine tests. Participants will have a physical examination and the following tests: Blood tests Includes HLA-typing, a genetic test of immune system markers; Leukapheresis Collection of large numbers of white blood cells Whole blood is collected through a needle in an arm vein. The blood circulates through a machine that separates it into its components. The white cells are removed and the rest of the blood is returned to the body, either through the same needle used to draw the blood or through another needle in the other arm. (Alternatively, patients will 100 cc (about 7 tablespoons) of blood drawn.); Lumbar puncture (spinal tap) Collection of cerebrospinal fluid (CSF, fluid that bathes the brain and spinal cord). A local anesthetic is administered and a needle is inserted in the space between the bones in the lower back where the cerebrospinal fluid circulates below the spinal cord. A small amount of fluid is collected through the needle; Magnetic resonance imaging (MRI) of the brain Imaging of the brain using a strong magnetic field and radio waves instead of X-rays. During the scan, the patient lies on a table in a narrow cylinder containing a magnetic field. He or she can speak with a staff member via an intercom at all times during the procedure; Neuropsychologic testing; Some participants may also have a hearing test and urine collection. Participants whose test results are positive for Borrelia burgdorferi will be followed at NIH at intervals of 3 to 6 months until it is determined whether there is infection. Those who are infected will be offered treatment with the antibiotic ceftriaxone. Following treatment, patients will return to the NIH Clinical Center for follow-up visits 1 week after treatment and again at 3, 6 and 12 months. The lumbar puncture, hearing examination, blood and urine tests will be repeated at these visits to evaluate the response to treatment, and the leukapheresis will be repeated for research purposes. Patients whose MRI was abnormal during therapy will have a repeat MRI at the 3-month, 6-month and 1-year visits. All participants with chronic Lyme disease, chronic Lyme arthritis, seropositive controls and recovered controls may be reevaluated at intervals of 6 to 12 months. ...

Participants needed: 700
Trial details
Age: 13-99Biological sex: AllType: ObservationalSponsor: National Institute of Allergy and Infectious Diseases (NIAID)Updated: Jun 30, 2026Locations: 1
Eligibility criteria

Age less than 18 (less than 13 for patients with PTLDS) [+20]

Status: Recruiting

Navigating Pregnancy and Parenthood With Lyme Disease

This is a mixed methods study exploring the experiences of pregnancy and parenting among participants with Lyme disease. Eligible participants will have been diagnosed with Lyme disease (LD), post-treatment Lyme disease syndrome (PTLDS), and/or chronic Lyme (CL) either during or before a prior pregnancy. Participants will complete quantitative surveys on topics such as their medical history, their child(ren)'s development, and demographic information. They will then participate in a qualitative interview where they will be asked about their experiences with pregnancy and with parenting their child(ren) in the context of their condition.

Participants needed: 30
Trial details
Age: 18+Biological sex: FemaleType: ObservationalSponsor: Children's National Research InstituteUpdated: Jun 17, 2026Locations: 1
Eligibility criteria

Over 18 years of age and reside in the United States or Canada [+1]

Under 18 years of age [+6]

Status: Recruiting

Pregnancy and Early Neurodevelopmental Outcomes Following In Utero Lyme Disease Exposure

The purpose of this pilot study is to assess the feasibility of longitudinal neurodevelopmental evaluation of fetuses and infants exposed to Lyme disease in utero. Participants with Lyme disease or Post-Treatment Lyme Disease Syndrome (PTLDS) will be recruited during pregnancy. Pregnancies will be monitored and infant development will be assessed from birth until age 18 months.

Participants needed: 40
Trial details
Age: 18+Biological sex: AllType: ObservationalSponsor: Children's National Research InstituteUpdated: Jun 16, 2026Locations: 1
Eligibility criteria

English speaker [+3]

Intellectually unable to comprehend study procedures [+2]

Status: Recruiting

Evaluation, Treatment, and Follow-up of Patients With Lyme Disease

This study is designed to establish a population of patients with Lyme disease for evaluation, treatment and follow-up to learn more about the infection. Patients with active Lyme disease may be eligible for this study. Participants will have a medical history and physical examination and diagnostic evaluations as appropriate to their individual condition. Laboratory tests may include routing blood and urine tests, X-rays, or other imaging studies, body fluid or tissue cultures, skin biopsy and tests for allergic or immune responses. Treatment will include only medications approved by the Food and Drug Administration, given according to accepted dose schedules and ways of taking the medicines. All diagnostic tests and treatments will be according to standard medical practice for the disease. No experimental procedures will be offered under this protocol. Patients will be followed as needed for evaluation and treatment of their condition. In general, they will be asked to return at the end of therapy, then 3, 6 and 12 months later, and then every 6 to 12 months. More frequent visits may be required or less frequent visits may be allowed, depending on the individual s condition. Participants may be asked to undergo the following additional procedures for research purposes: * Extra blood draws to study Lyme disease and other inflammatory conditions. Blood will be drawn from arm veins. The total amount drawn during any 6-week period will not exceed 450 cc (30 tablespoons) for adults and 7 cc (1/2 tablespoon) per kilogram (2.2 pounds) of body weight for children under 18 years of age. * Leukapheresis to collect large numbers of white blood cells. Whole blood is collected through a needle in an arm vein, similar to donating blood. The blood circulates through a machine that separates it into its components, and the white cells are removed. The rest of the blood is returned to the body through the same needle. Only adults 18 years of age and older will be asked to undergo leukapheresis.

Participants needed: 500
Trial details
Age: 2-99Biological sex: AllType: ObservationalSponsor: National Institute of Allergy and Infectious Diseases (NIAID)Updated: Jun 5, 2026Locations: 1
Eligibility criteria

Clinical diagnosis of active Lyme disease at the time of the initial NIH evaluat... [+1]

Post treatment Lyme disease syndrome. [+10]

Status: Recruiting

A Study to Evaluate the Safety, Reactogenicity, and Immunogenicity of mRNA-1982 to Prevent Lyme Disease in Healthy Participants (18 to 70 Years of Age)

This clinical study will evaluate the safety, reactogenicity, and immunogenicity of monovalent mRNA-1982, a messenger ribonucleic acid (mRNA) vaccine to prevent Lyme disease in healthy adults aged 18 to 70 years old.

Participants needed: 350
Trial details
Phase: Phase 2Age: 18-70Biological sex: AllType: InterventionalSponsor: ModernaTX, Inc.Updated: May 28, 2026Locations: 8
Eligibility criteria

In good general health in the opinion of the investigator as determined by medic... [+1]

History of anaphylaxis or severe hypersensitivity reaction requiring medical int... [+4]

Status: Recruiting

A Study to Evaluate Safety and Efficacy of TP-05 in Healthy Participants With Tick Exposure

This study is designed to evaluate the safety, tolerability, and pharmacokinetics of TP05 administered orally to healthy adult participants.

Participants needed: 700
Trial details
Phase: Phase 2Age: 18-70Biological sex: AllType: InterventionalSponsor: Tarsus Pharmaceuticals, Inc.Updated: May 20, 2026Locations: 19
Eligibility criteria

Overtly healthy adult participants aged 18 to 70 years [+4]

Prior exposure to TP05 or any isooxazoline in the last 12 months [+7]

Status: Recruiting

Human Immune Response to Ixodes Scapularis Tick Bites

Background: Each year, the number of cases of tick-borne diseases increases. The deer tick (Ixodes scapularis) is the vector of at least 7 pathogens that cause human diseases, including Lyme disease. Researchers want to learn more to help them develop vaccines against ticks in the future. Objective: To learn how people s bodies, particularly the skin, respond to tick bites. Eligibility: Healthy adults aged 18 years and older who have no known history of a tick-borne disease or tick bite exposure. Design: Participants will be screened with a medical history, physical exam, and blood tests. Participants will have 2 skin punch biopsies of healthy skin. For this, a sharp instrument will be used to remove a round plug of skin about the size of a pencil eraser. Participants will then have 10 clean laboratory-bred ticks placed at 2 different sites on their skin (20 ticks total). The ticks will be removed from the first site 1 day after placement and from the second site 2-4 days after placement. Participants will complete symptom diary cards. They will answer questions about itching at the tick feeding sites. They will give blood samples. Photos will be taken of the tick feeding sites. Skin punch biopsies will be collected at the sites of the tick bites. Participants will repeat the tick feeding procedures 2 times, each 2-8 weeks apart. For the 2nd and 3rd procedures, 10 clean laboratory-bred ticks will be placed at 1 site. The ticks will be removed 2-3 days after tick placement. They will have telephone follow-up visits after each procedure. After the final tick removal, participants will have follow-up visits in 4-6 weeks and again in 3 months. They will give blood samples and discuss how they are feeling. Participation will last about 5-7 months.

Participants needed: 60
Trial details
Phase: Phase 1, Phase 2Age: 18-99Biological sex: AllType: InterventionalSponsor: National Institute of Allergy and Infectious Diseases (NIAID)Updated: May 6, 2026Locations: 1
Eligibility criteria

Stated willingness to comply with all study procedures and availability for the... [+10]

History of forming large thick scars (keloids) after skin injuries. [+15]

Status: Recruiting

A Study to Learn About the Safety, Tolerability, and Immunogenicity of a Fifth Dose of 6-Valent OspA-Based Lyme Disease Vaccine

The purpose of this study is to learn about the safety effects of the Lyme disease vaccine (called VLA15), and its ability to protect people from Lyme disease after a 5th dose of the vaccine. This study is seeking participants who: * are generally healthy and 7 years of age and older, * have already been vaccinated with 4 doses of VLA15 (from the VALOR study), and have blood sample taken post dose 4. * are not currently taking, or haven't recently taken, medicines like chemotherapy, blood products, or blood thinners. * are not pregnant or breastfeeding and do not plan to become pregnant while receiving the study vaccine. All participants in this study will receive a total of 1 dose through a shot in the upper arm, either VLA15 or saline shot (saltwater). The study will compare the experiences of people receiving the study vaccine or saltwater shot. Participants will take part in this study for about 12 months. During this time, they will have 4 planned clinic visits. The clinic visits may include having a health check, giving a small amount of blood and getting the study vaccine or saltwater as a shot at the first visit.

Participants needed: 1,712
Trial details
Phase: Phase 3Age: 7+Biological sex: AllType: InterventionalSponsor: PfizerUpdated: May 6, 2026Locations: 22
Eligibility criteria

Participants who are healthy as determined by medical history and clinical judgm... [+3]

Pregnant or breastfeeding participants. [+5]

Status: Recruiting

Borrelia B-cell Diagnostics

The investigators propose a single center, prospective observational study in children with Lyme disease (LD), the Borrelia B-cell diagnostics (BRILLIANT) study, to assess the immune response against Borrelia burgdorferi (Bb) with the following main objectives: 1. Development of Bb-specific ASC ELISpot as a new test method for diagnosis of early LD. There is an urgent unmet clinical need for a better diagnostic tool for early LD, as the current standard two-tier testing has low sensitivity in recently infected patients and may show false positive results in recovered patients due to long-term persistence of antibodies against Bb. The measurement of Bb-specific ASC with the ELISpot assay my has the potential to overcome these issues and to improve diagnosis in early LD. 2. Extensive analysis of the immune response in LD. The immune response in LD is not well understood. Large-scale studies assessing the detailed immune cell subsets/phenotypes present in blood, CSF, or synovial fluid of LD patients with respective manifestations are lacking. 3. Isolation and characterization of causative Bb species. Existing literature suggests that Bb genospecies and/or genotypes may determine virulence and manifestations, but large-scale studies assessing Bb genospecies/genotypes in different manifestation of LD are lacking. 4. Collection of clinical data about symptoms, severity, routine laboratory and diagnostic test results, treatment, and outcome of LD. 5. Biobanking samples for analysis in the future. Project population Inclusion criteria: Children, 0-17 years of age, at University Children's Hospital Zurich: * LD differential diagnosis cohort: Patients presenting at the ED with differential diagnosis of LD according to the treating physician. * Control cohort: Previously healthy patients (HC) with routine blood investigations presenting at the ED or PID outpatient department Exclusion criteria: Primary or secondary immunodeficiency.

Participants needed: 502
Trial details
Age: 1-17Biological sex: AllType: ObservationalSponsor: University Children's Hospital, ZurichUpdated: Apr 28, 2026Locations: 1Duration: 6 Months
Eligibility criteria

Patients presenting at the ED with differential diagnosis of LD according to the...

Patients will be excluded in cases of primary or secondary immunodeficiency

Status: Recruiting

Rheumatology Patient Registry and Biorepository

To facilitate clinical, basic science, and translational research projects involving the study of rheumatic diseases.

Participants needed: 5,000
Trial details
Age: 18-99Biological sex: AllType: ObservationalSponsor: Yale UniversityUpdated: Feb 13, 2026Locations: 1Duration: 10 Years
Eligibility criteria

Patients ≥18 years old with a diagnosis of a rheumatic autoimmune disease includ... [+1]

Unable to provide informed consent [+11]

Status: Not yet recruiting

Safety and Effectiveness of the BlinkER System in Participants With Facial Nerve Palsy

Prospective, single-arm, multicenter, single-masked, pivotal study to Evaluate the Safety and Effectiveness of the Blinker system in Participants with Facial Nerve Palsy.

Participants needed: 80
Trial details
Age: 22-120Biological sex: AllType: InterventionalSponsor: Neurotrigger LtdUpdated: Jun 10, 2025Locations: 1
Eligibility criteria

Unilateral facial palsy due to any of the following: Bell's palsy, Ramsay Hunt s... [+6]

Bilateral facial paralysis (for example Parkinson's Disease) [+14]

Status: Recruiting

Rare Disease Patient Registry & Natural History Study - Coordination of Rare Diseases at Sanford

CoRDS, or the Coordination of Rare Diseases at Sanford, is based at Sanford Research in Sioux Falls, South Dakota. It provides researchers with a centralized, international patient registry for all rare diseases. This program allows patients and researchers to connect as easily as possible to help advance treatments and cures for rare diseases. The CoRDS team works with patient advocacy groups, individuals and researchers to help in the advancement of research in over 7,000 rare diseases. The registry is free for patients to enroll and researchers to access. Visit sanfordresearch.org/CoRDS to enroll.

Participants needed: 20,000
Trial details
Biological sex: AllType: ObservationalSponsor: Sanford HealthUpdated: May 29, 2025Locations: 2Duration: 100 Years
Eligibility criteria

Diagnosis of a rare disease, a disease of unknown prevalence, undiagnosed or an...

Diagnosis of a disease which is not rare

Status: Not yet recruiting

Serological Measurement of Montpellier Professionals' Contacts with Infectious Agents Responsible for Animal-borne Diseases

Zoonoses and arboviroses refer to a group of diseases transmitted from animals to humans, either directly or indirectly (via mosquitoes, ticks or contact with contaminated environments). Most of these diseases are found in certain tropical zones, but global warming and increased international trade are modifying their geographical distribution, with a gradual trend towards temperate regions. A number of these pathogens have already been detected in Occitania, including dengue fever, West Nile, leishmaniasis and Q fever. Given the region's high mosquito population and favorable climatic conditions, other zoonoses have a strong potential to appear in the region, or may already be circulating at a low level. The study focuses on 18 pathogens selected for their potential to emerge and establish themselves in the Occitanie region: Leishmaniasis, Leptospirosis, Brucellosis, Q fever, Rickettsiosis, Tularemia, Psittacosis, Lyme disease, Tick-borne encephalitis, Hantavirus, Hepatitis E virus, Dengue virus, Zika virus, Chikungunya virus, West-Nile virus, Usutu virus, Toscana virus, Crimean-Congo haemorrhagic fever virus. The aim of the study is to find out whether patients have antibodies against these infectious agents, which would indicate that they have been exposed to them in the past, even in the absence of symptoms. Describing the circulation of these pathogens will enable to implement appropriate public health measures to avoid the risk of epidemics (mosquito control, informing professionals, etc.), as well as to assess the risk incurred in the workplace and have this risk recognized by the healthcare system.

Participants needed: 183
Trial details
Age: 18+Biological sex: AllType: InterventionalSponsor: University Hospital, MontpellierUpdated: Mar 5, 2025Locations: 1
Eligibility criteria

Age 18 or over [+3]

- Pregnant and breast-feeding women [+5]

Status: Recruiting

Central Nervous System Infections in Denmark

The Danish Study Group of Infections of the Brain is a collaboration between all departments of infectious diseases in Denmark. The investigators aim to monitor epidemiological trends in central nervous system (CNS) infections by a prospective registration of clinical characteristics and outcome of all adult (\>17 years of age) patients with community-acquired CNS infections diagnosed and/or treated at departments of infectious diseases in Denmark since 1st of January 2015.

Participants needed: 1,900
Trial details
Age: 18+Biological sex: AllType: ObservationalSponsor: Aalborg University HospitalUpdated: May 16, 2024Locations: 8
Eligibility criteria

CSF leukocytes> 10/mL and no other more probable diagnosis assessed by the local...