Clinical trials
Microbial Colonization clinical trials
Below are recruiting microbial colonization clinical trials, each written for real people, not researchers. We’re tracking 30 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06805994RecruitingPhase 1
Restoring infant nose bacteria after staph treatment
This study tests whether giving a nasal spray of healthy bacteria to infants can restore good germs in the nose after they receive mupirocin ointment to treat Staph aureus. It aims to bring back a healthy nasal microbiome.
Baltimore, MarylandAges birth–60 years - NCT06149585Recruiting
Bacteria changes in gum disease patients getting all dental implants
This study looks at how bacteria in your mouth change when all your teeth are removed and replaced with dental implants. If you have severe gum disease and need all your teeth extracted, joining this trial could help researchers understand your healing process.
Cleveland, OhioAges 21 years+ - NCT06390696Recruiting
Sand play for eczema: a biodiversity study
This study looks at whether playing in sand with different types of natural materials (to increase your contact with harmless microbes) can improve eczema symptoms. You would stop using your usual eczema creams during the trial to see if the sand play alone helps.
Helsinki, UusimaaAges 2–5 - NCT07817498Recruiting
Comparing two attachment types for implant-supported dentures
This study compares two different types of attachments (MK1 and Clip) used to hold a lower denture in place with four dental implants. It looks at how they affect bacteria in the mouth, which may help in choosing the better attachment for better oral health.
Al MansurahAges 45–65 - NCT05127252Recruiting
Study how gut bacteria may affect time to pregnancy
This study looks at whether differences in the gut (microbiome) are linked to how long it takes to get pregnant and pregnancy outcomes. It may help researchers understand who might benefit from future microbiome-focused approaches.
Stockholm, HuddingeAges 18–40 - NCT05561504Recruiting
Study of stomach bacteria resistance in adults
This study looks at how common a stomach bacteria infection is and which antibiotics still work. You may help researchers by providing consent for related study participation and sample tracking.
MunichAges 18 years+ - NCT06018792Recruiting
New blood test for faster sepsis diagnosis in children
This trial tests a new, faster way to find bacteria in the blood of children with suspected sepsis. It uses a molecular test that may give results sooner than standard cultures, helping doctors treat infections more quickly.
AmsterdamAges birth–18 years - NCT06466707Recruiting
Collecting gut bacteria samples from healthy volunteers
This study collects stool or other samples from healthy people to learn more about the helpful bacteria in our gut. It may help researchers understand how these bacteria affect health.
Ghent, East FlandersAges 2–70 - NCT06390878Recruiting
Study on natural kindergarten yards
This study looks at how bringing nature back into kindergarten yards might affect children's health. It involves children who attend kindergarten and have not used antibiotics recently.
Helsinki, UusimaaAges 1–5 - NCT05923333Recruiting
Breastfed infants of HIV-exposed mothers get a probiotic
This study gives a specific probiotic (from B. infantis) to babies born without HIV to see if it can improve the baby’s early immune health. It focuses on babies who are HIV-exposed because their mother has HIV and plans to exclusively breastfeed for the first 6 months.
Cape TownAges birth–50 years - NCT04447742Recruiting
Study of how healthy babies’ gut microbes develop from birth
This study follows pregnant people from about 20 weeks until delivery, to understand how gut microbes (tiny organisms in the intestines) develop in healthy babies. It may help researchers learn how early-life gut development affects health later on.
BernAges 18–45 - NCT05432362Recruiting
Energy sensing brain study in depression and weight groups
This study tests how the brain and body respond to “energy sensing” in people with depression and in people with different body weights. You may be asked to do assessments and follow specific health and diet rules so the researchers can compare groups.
Graz, StyriaAges 18–40 - NCT05502380RecruitingPhase 3
Antibiotic prevention study for high-risk bone and spine surgeries
This Phase 3 study tests whether giving a broad set of preventive antibiotics before certain high-risk orthopedic surgeries lowers the chance of serious wound or bone infection. It mainly targets people who have contaminated wounds, tumor-related surgery, or known high-risk germs on the skin.
ZurichAges 18 years+ - NCT06574724Recruiting
Greenspace microbes and human health study
This trial looks at how tiny organisms (microbes) from parks, gardens, and other green spaces might move to people. It helps researchers understand if being around nature is good for your health.
AntwerpAges 4 years+ - NCT07429864Recruiting
Bulevirtide for hepatitis D: bile acids and gut bacteria
This study looks at how Bulevirtide, a treatment for hepatitis D, affects bile acids and gut bacteria. It may help patients with chronic HDV and stable liver disease who are already on HBV therapy.
RomaAges 18 years+ - NCT05524649Recruiting
Probiotics for healthy newborns’ poop bacteria balance
This study looks at whether giving probiotics to healthy newborns changes the bacteria in their stool. It may help researchers understand early gut health, but it is only for babies who meet specific health and timing requirements.
Alcaldía Coyoacán, PueblaAges 1 day–3 months - NCT06546020Recruiting
Haskap berries for gut and metabolic health
This study tests whether a berry called Haskap can improve your gut health and how that might affect your overall health. Researchers are looking for people with and without certain metabolic risk factors to see who benefits most from adding these berries to their diet.
Bozeman, MontanaAges 35–65 - NCT04735835Recruiting
Personalized diet testing using ZOE app and blood samples
This trial studies how different food compositions affect your body, using the ZOE testing program plus meals you eat and blood samples you collect. It may help you learn more about what foods work best for you, especially if you have a long-term health condition.
Needham, MassachusettsAges 18 years+ - NCT06381882Enrolling by invitation
Human microbiome study after pancreatic surgery
This study looks at how tiny organisms in your gut (the microbiome) affect recovery after surgery for pancreatic cancer or related growths. It may help doctors understand how to improve outcomes for future patients.
NieuwegeinAges 18 years+ - NCT06264219RecruitingPhase 1
Restoring gut bacteria after C-section birth
This trial tests whether giving a small dose of the mother's vaginal bacteria to babies born by C-section can help restore their gut microbiome. It may reduce the risk of allergies and other immune-related conditions later in life.
Gentofte Municipality, CopenhagenAges 18 years+ - NCT06177184Recruiting
Donor milk for full-term cesarean-born babies
This study tests whether giving donor breast milk to full-term babies born by C-section can improve their gut health. If your baby was born by C-section and you plan to breastfeed, this trial may be a good fit.
Calgary, AlbertaAges 9 months+ - NCT04966793Recruiting
Study bacteria patterns in bronchiectasis and how they change
This study looks at how bacteria live in the lungs of people with bronchiectasis and how they may adapt over time. It may help researchers understand why infections keep coming back and how to better manage chronic lung colonization.
Hangzhou, ZhejiangAges 18–79 - NCT05966649Recruiting
Synbiotics for preventing preterm birth in higher-risk pregnancies
This trial tests whether taking synbiotics (a mix of “good” probiotics and “food” for them) can help lower the chance of going into labor too early. It’s for pregnant people with certain risk factors for preterm birth, and it compares outcomes while you follow the study plan.
Edegem, AntwerpenAges 18 years+ - NCT05963711Recruiting
Study penis microbiome in partners during vaginal microbiome treatment
This study looks at how the bacteria on a man’s penis may change during a woman’s vaginal microbiome transplant (VMT) for recurrent bacterial vaginosis (BV). You may be asked to follow condom and “decolonization” steps to help the researchers understand what works and why.
JerusalemAges 18 years+
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Common questions
- Are there clinical trials for microbial colonization?
- Yes. Clin2 currently lists 30 recruiting microbial colonization studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a microbial colonization trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a microbial colonization trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.