An observational study in Malaria, Intestinal Worms and GI Protozoa, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Recruiting at 1 site in United States. Open to participants aged 3 Years and older. Per ClinicalTrials.gov, last updated 2026-11-03.
Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Observational
The purpose of this study is to evaluate, treat and follow patients with parasitic infections.
People with a known or suspected parasitic infection who are at least 1 year old may be enrolled. This study does not involve any experimental treatments.
Participants will have a physical examination and laboratory tests on blood, stool, or urine. Blood samples may be collected at regular intervals, but no more than 450 ml (15 ounces) of blood will be drawn from adults, and no more than 7 ml (1-1/2 teaspoons) per kg (2.2 pounds) of body weight from children, in any 6-week period. Other tests may include x-rays, electrocardiogram (EKG), or tissue biopsy (surgical removal of a small tissue sample), depending on the individual s condition.
Patients may be offered treatment or may be referred to another study that is more appropriate for the problem. Any treatment provided in this study will be according to standard medical practice for the patient s specific medical problem. Patients responses to treatment will be evaluated at regularly scheduled clinic visits. The length of time between visits and the total duration of the study for a given individual will be determined by the study doctor, based on that person s medical condition.
This study is designed as a prospective study to evaluate and treat patients with parasitic infection. Patients with known or suspected parasitic infection will be enrolled and will be evaluated for the presence of a parasitic infection. Minimal studies scheduled for each visit will include a medical history, physical examination, routine laboratory tests, and specialized diagnostic procedures for possible parasitic infections. Treatment plans will be individualized for each patient's particular condition, and the number and length of additional visits and diagnostic evaluations will vary accordingly. Specific treatment regimens will be in accordance with standard medical practice.
1,184 studies on the registry are indexed under Malaria; 79 are open to participants now.
This study's planned enrollment of 800 is above the median of 582 across 204 observational studies indexed under Malaria.
Browse Malaria studies →National Institute of Allergy and Infectious Diseases (NIAID) is the lead sponsor of 2,446 studies on the registry; 179 are open to participants now.
Of its 405 completed or terminated interventional studies of FDA-regulated products, 302 (75%) have results posted.
Counted across the registry records on this site, refreshed daily.
Primary clinical.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Age 3 or over.
Access to a primary medical care provider outside of the NIH
Clinical evidence suggestive of a parasitic infection
EXCLUSION CRITERIA:
Less than 3 years of age
No evidence suggestive of a parasitic infection
Subjects infected with a GI parasite
Subjects infected with echinococcus
Subjects infected with parasitic intestinal worm
Subjects infected with malaria
Subjects infected with a parasitic infection that is not included in the other cohorts
The Laboratory of Parasitic Diseases has been conducting studies of the diagnosis, treatment, and pathogenesis of wide variety of parasitic infections.
Elimination of parasitic infection.
Time frame: 1 year
Started Oct 1998 (actual).
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
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National Institute of Allergy and Infectious Diseases (NIAID) →