Actively Recruiting

Age: 3Years - 100Years
All Genders
ID00001230

Host Response to Infection and Treatment in the Filarial Diseases of Humans

Led by National Institute of Allergy and Infectious Diseases (NIAID) · Updated on 2026-06-08

500

Participants Needed

1

Research Sites

N/A

Total Duration

On this page

AI-Summary

What this Trial Is About

Researchers are studying patients with filarial infections, which are caused by parasitic worms transmitted by mosquito bites. These infections can range from no symptoms to serious issues like swelling, allergic lung problems, skin rashes, eye inflammation leading to blindness, and heart disease. The study aims to explore the immune response to these infections, including how susceptible people are, how the disease develops, and how patients respond to treatment. Participants diagnosed with or suspected of having filarial infections will undergo standard medical tests to identify the specific parasite type. Depending on the infection, tests may include lung, skin, or heart examinations, and some may have a skin biopsy or bronchoalveolar lavage if medically necessary. Treatment will follow standard care using diethylcarbamazine or ivermectin based on the infection type. Additional research procedures include extra blood draws, urine collections, skin allergy tests, and leukapheresis for immune cell collection in adults. During the study, participants will have more frequent follow-up visits than usual, including physical exams and blood tests. Researchers will collect blood and serum samples to study immune responses and monitor how patients clinically and immunologically respond to treatment over time. The main outcome is to understand the factors affecting infection susceptibility, disease progression, and treatment response, with long-term observation planned for up to 10 years.

CONDITIONS

Brief Title

Host Response to Infection and Treatment in Filarial Diseases

Who Can Participate

Age: 3Years - 100Years
All Genders

Eligibility Criteria

Eligible

You may qualify if you...

  • Age 3-100 years
  • Access to a primary medical care provider outside of the NIH
  • Ability to give informed consent
  • Clinical evidence suggestive of a filarial infection
Not Eligible

You will not qualify if you...

  • Pregnant or nursing women will be excluded from receiving treatment while pregnant or breastfeeding
  • Less than 3 years of age or greater than 100 years of age
  • Any condition that the investigator feels puts the subject at unacceptable risk for participation in the study

AI-Screening

AI-Powered Screening

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Treatment

Duration - Duration varies according to treatment protocol

Participants receive treatment with Diethylcarbamazine following standard dosing under clinical care.

Visits as part of routine clinical care

Long-term Monitoring

Duration - Up to 10 years

Participants are followed long-term to observe clinical and immunologic responses to therapy over several years.

Periodic follow-up visits over the monitoring period

Trial Site Locations

Total: 1 location

1

National Institutes of Health Clinical Center

Bethesda, Maryland, United States, 20892

Actively Recruiting

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Research Team

L

Lori A Penrod, R.N.

T

Thomas B Nutman, M.D.

How is the study designed?

Study Type

OBSERVATIONAL

Masking

N/A

Allocation

N/A

Model

N/A

Primary Purpose

N/A

Number of Arms

1

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Published Research Related To This Trial

Differences in the Clinical and Laboratory Features of Imported Onchocerciasis in Endemic Individuals and Temporary Residents.

Adrienne J Showler, Joseph Kubofcik, Alessandra Ricciardi...

https://pubmed.ncbi.nlm.nih.gov/30761981

Eosinophil-associated processes underlie differences in clinical presentation of loiasis between temporary residents and those indigenous to Loa-endemic areas.

Jesica A Herrick, Simon Metenou, Michelle A Makiya...

https://pubmed.ncbi.nlm.nih.gov/25234520

A Novel, Highly Sensitive Nucleic Acid Amplification Test Assay for the Diagnosis of Loiasis and its Use for Detection of Circulating Cell-Free DNA.

Sasisekhar Bennuru, Frimpong Kodua, Papa Makhtar Drame...

https://pubmed.ncbi.nlm.nih.gov/37243712

IL-10 and Its Related Superfamily Members IL-19 and IL-24 Provide Parallel/Redundant Immune-Modulation in Loa loa Infection.

Alessandra Ricciardi, Thomas B Nutman

https://pubmed.ncbi.nlm.nih.gov/32561912