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Does COVID-19 hide in the gut? scientists probe stool for clues
NCT ID NCT04359836
First seen Sep 21, 2026 · Last updated Sep 21, 2026
Summary
Researchers are studying whether SARS-CoV-2, the virus that causes COVID-19, can be found in the stool of infected patients. They will collect stool samples from 250 adults who tested positive for COVID-19 within the past week and sequence the gut bacteria in those samples. The goal is to see if the virus is shed in stool and whether certain gut microbes are linked to the infection.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If researchers find the virus in stool, it could improve understanding of how COVID-19 spreads and whether gut bacteria affect how sick people get.
- What could go wrong
- This is a small pilot study with no treatment. It can only find patterns, not prove cause and effect, and its results may not apply to other groups of patients.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 250 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2020
- Expected to finish
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Jul 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Adults 18 and older
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Signed informed consent, demonstrating that the patient understands the procedures required for the study and the purpose of the study 2. Male or female of 18 years of age or older 3. Diagnosis of COVID-19 infection by RT- PCR within 1 week of Screening Exclusion Criteria: 1. Refusal to sign informed consent form 2. History of bariatric surgery, total colectomy with ileorectal anastomosis or proctocolectomy. 3. Postoperative stoma, ostomy, or ileoanal pouch 4. Treatment with total parenteral nutrition
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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ProgenaBiome
Ventura, California, 93003, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Can a mild case of COVID-19 harm your kidneys? urine tests may hold the answer
- When the immune system Can't fight back: tracking three respiratory viruses