- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04258670
Spontaneous Antigenemia in Loiasis
Spontaneous Antigenemia in Loiasis, A Study of the Loiasis Antigens Responsible for Cross-reactivity in the Rapid Diagnostic Test for Lymphatic Filariasis
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Global efforts to eradicate lymphatic filariasis (LF) depend on rapid diagnostic tests (RDTs) that detect Wuchereria bancrofti circulating filarial antigen but these tests are unreliable in African nations where Loa loa is co-endemic because they yield false-positive results in some individuals with loiasis. The goals of this project are to define the cross-reactive antigen profile of persons with spontaneous antigenemia, how it varies over time, and to determine which L. loa antigens in cross-reactive sera best distinguish loiasis cross-reactivity from LF.
This prospective study will prospectively enroll 50 adults who presented with cross-reactive antigenemia at screening and 10 negative controls. Participants will followed for one year and tested every three months for persistence of antigenemia.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
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-
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Yaoundé, Cameroon
- Centre for Research on Filariasis and other Tropical Diseases (CRFilMT)
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Ability to give informed consent
- Loiasis Mf count > 20,000 Mf/mL
- Resident of study area
- No evidence of severe or systemic comorbidities
- Consent to storage of blood samples for future study
Exclusion Criteria:
- Subject plans to move from the study area during subsequent 12 months
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Cross-reactive loiasis
This cohort will prospectively enroll 50 adults (age 18+) with cross-reactive antigenemia based on a positive filariasis test strip (FTS) and L. loa Mf counts >20,000 Mf/mL.
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Patients in these cohorts will not be given anti-filariasis therapies because these drugs are not approved for use in patients with high worm burdens (>20,000 Mf/mL)
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non-cross-reactive loiasis
This cohort will prospectively enroll 10 adults (age 18+) with a negative filariasis test strip (FTS) and L. loa Mf counts >20,000 Mf/mL.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
prevalence of specific cross-reactive L. loa antigens at baseline
Time Frame: 1 day
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Prevalence of filariasis test strip (FTS) positive individuals at screening.
Cross-reactive proteins in plasma will be identified by mass-spectrometry to identify a cross-reactive biomarker
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1 day
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Recurrence of cross-reactive antigenemia
Time Frame: quarterly for 1 year
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To determine if the same antigens are present at each follow up
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quarterly for 1 year
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Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Philip Budge, MD, PhD, Washington University School of Medicine
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 201909003
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
IPD Sharing Time Frame
IPD Sharing Access Criteria
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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