Comparison of Immune Response in Normal Volunteers and Patients With Helminth Infections
Completed
Conditions studied: Healthy, Helminthiasis
In brief
This study will compare the structure, chemical composition and other characteristics of skin and blood in people with and without parasitic infections. Cell samples will be taken from blisters produced by suction blistering. This study may provide new information about the interactions between parasites and the immune system that could lead to better treatments for these infections. Normal volunteers and patients with acute helminth (a type of parasite) infections aged 18 years older may be eligible for this study. Following a medical history and physical exam, participants will undergo suction blistering to provide cells needed for study. A suction blister device is attached to the skin of the thigh. A heating element in the device heats the skin to speed blister formation. (This will feel only a slightly warm.) The device is removed after about two hours, when the blisters have formed. The blister tops are removed with sterile scissors. The blistered areas are then treated with special dressings to promote healing and the participant is discharged with further wound care instructions. A small amount of blood (around four tablespoons) may be drawn to compare chemicals in the blood with chemicals in the blister fluid. Participants will be contacted by telephone over the next 72 hours to check on healing. Further follow-up will occur by phone at 6 months and 1 year. Up to 60 blisters may be produced over a one-year period (in three separate sessions every six months) with no more than 20 raised per session....
Key facts
- Study ID
- NCT00004996
- Run by
- National Institute of Allergy and Infectious Diseases (NIAID)
- People needed
- 90
- Starts
- 2000-03-20
- Expected to finish
- 2015-04-22
- Last updated by the study team
- 2019-12-12
Who can join
Age: 18 and older, up to 65. Sex: any. Healthy volunteers: accepted.
You may not qualify if…
- History of malignancy or autoimmune disease such as rheumatoid arthritis, vasculitis, pyoderma gangrenosum
- Use of systemic corticosteroids within the past month
- Use of local corticosteroids at the proposed blistering site within the past month
- Evidence of current acute infection
- Personal or family history of keloid formation
- Use of any investigative drugs within the past month
- History of skin disease within the past one year (e.g. psoriasis, atopic dermatitis)
- History of diabetes
Where it is running
- National Institutes of Health Clinical Center, 9000 Rockville Pike — Bethesda, Maryland, United States
Full record on ClinicalTrials.gov
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