Lyme Disease
Conditions
Brief summary
To establish performance of individual tests and combinations of tests (serological, molecular and cellular tests) in early Lyme infection diagnosis
Detailed description
The present study aims to investigate the performance characteristics of both established and new assays for Borrelia burgdorferi infection and to assess the relative performance of appropriate combinations of these tests. The study will also investigate the effect of the time course of the infection and its treatment on the outcomes for the various tests. Polymerase Chain Reaction(PCR), serology and T cell based tests will be performed. In addition, tests for Babesia, Anaplasma, Ehrlichia and Rickettsia will also be performed as these pathogens can be carried by the same tick that carries Borrelia and may result in coinfection.
Interventions
DIAGNOSTIC_TESTPCR based assay
Whole blood specimens will be tested for the presence of Borrelia DNA by PCR in a two-step test (Imugen). In Cohort 1a and 1b. The first step tests for the presence of any Borrelia DNA. The second step is employed on positive samples and tests for the presence of either B. burgdorferi DNA or B. miyamotoi DNA. Positivity by PCR has a short but early window in the infection cycle for Borrelia burgdorferi and results may enable this window period and diagnosis rates to be better defined. In addition co-infection PCR analysis will be performed for the presence of Babesia, Anaplasma or Ehrlichia DNA (Imugen).
DIAGNOSTIC_TESTSerology based assay
1. The Imugen Lyme Antibody Analysis which includes immunoglobulin M (IgM),immunoglobulin G (IgG), and immunoglobulin A (IgA) antibody capture immunoassay and IgG and IgM based Western blots. In Cohort 1a and 1b. 2. The Immunetics C6 Lyme ELISA assay. 3. A 2-tier Lyme test performed and interpreted according to Centers for Disease Control (CDC) Guidelines 4. A Rickettsia antibody test will be used to identify Spotted Fever and Typhus fever groups infections. Lyme test methodologies generally indicate a need to run a combination of tests in order to overcome limitations in either sensitivity or specificity of the various individual tests. Performance of all these tests on the same set of samples should enable both individual and combinatorial performance values to be calculated and compared.
DIAGNOSTIC_TESTTcell based assay
A research based ELISpot assay will be performed on peripheral blood mononuclear cells (PBMC) extracted from whole blood samples to test for presence of T cells activated against Borrelia antigens. Unlike serology based methods, this signal may not persist over extended periods of time in the absence of Borrelia antigens. The diagnostic window may be different for a test measuring adaptive immune response (i.e. T cells) and thus such test may identify patients with undetectable antibody response and may aid sensitivity of diagnosis.
Sponsors
Oxford Immunotec
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
5 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Cohort 1a (typical EM and intention to treat): Inclusion 1. Documented new onset Lyme disease EM rash (single or multiple) with photographic evidence provided to Oxford Immunotec. 2. Patient must be able to provide blood sample at the initial visit (prior to treatment initiation) and subsequent samples according to the schedule. 3. Patients 5 years of age or older, with a minimum weight of 40 pounds. 4. Patient able to read English and to give consent to study participation. 5. If patient is younger than 18 years of age a legally authorized representative must provide consent. Cohort 1b (no typical EM; Lyme disease symptoms; intention to treat): Inclusion 1. Patients with suspected Lyme disease, based on physician's examination, where the physician has the intention to treat for Lyme disease (i.e. patients who following initial examination were prescribed treatment for Lyme disease). 2. Documented new onset of Lyme disease symptoms without a typical EM rash or with no rash. If a rash is present, photographic evidence must be provided. 3. Patient must be able to provide blood sample at the initial visit (prior to treatment initiation) and subsequent samples according to the schedule. 4. Patients 5 years of age or older, with a minimum weight of 40 pounds. 5. Patient able to read English and to give consent to study participation. 6. If patient is younger than 18 years of age a legally authorized representative must provide consent. Cohort 2 (Healthy subjects): Inclusion 1. Subjects 5 years of age or older, with a minimum weight of 40 pounds. 2. Subjects never diagnosed with any tick borne disease including Lyme disease 3. Subjects able to read English and to give consent to study participation. 4. If subject is younger than 18 years of age a legally authorized representative must provide consent.
Exclusion criteria
* Exclusion Cohort 1a (typical EM and intention to treat): 1. Patients with Lyme-like symptoms lasting longer than 1 month prior to study enrolment. 2. Patients receiving treatment for any tick borne disease (including Lyme disease) prior to enrolment. 3. Patients who received a Lyme vaccination. 4. Patients with anemia defined as a serum hemoglobin \<10gm/dL. 5. Patients who are participating in, or plan to participate in, any investigational drug study. 6. Patients who are considered unsuitable for the study by the Investigator. Cohort 1b (no typical EM; Lyme disease symptoms; intention to treat): 1. Patients with Lyme-like symptoms lasting longer than 1 month prior to study enrolment. 2. Patients receiving treatment for any tick borne disease (including Lyme disease) prior to enrolment. 3. Patients who received a Lyme vaccination. 4. Patients with anemia defined as a serum hemoglobin \<10gm/dL. 5. Patients who are participating in, or plan to participate in, any investigational drug study. 6. Patients who are considered unsuitable for the study by the Investigator. Cohort 2 (Healthy subjects): Exclusion 1. Subjects with a history of tick bite 2. Subjects with past or current tick borne disease diagnosis 3. Subjects at risk for tick borne diseases including Lyme disease 4. Subjects residing in endemic regions for tick borne diseases: Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia and Wisconsin. 5. Subjects who have ever visited non-urban areas of endemic regions for tick borne diseases: Connecticut, Delaware, Maine, Maryland, Massachusetts, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia and Wisconsin.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Sample Data Analysis | Tests at different time points post inital presentation will be evaluated through study completion, an average of 1 year. | The results will be used to calculate performance, including sensitivity and specificity of the tests under evaluation. The utility of these tests at different time points post initial presentation will be evaluated. |
Countries
United States
Outcome results
None listed