How ampicillin and breast milk affect a baby's gut health and immune system

The impact of ampicillin and breast milk oligosaccharides on the infant microbiome and immune functions

NIH-funded research University of California, San Diego · NIH-11143902

This project explores how antibiotics given to mothers during childbirth and the special sugars in breast milk shape a newborn's gut bacteria and developing immune system.

Quick facts

Grant typeNIH-funded research
Study typeNIH-funded research
Funding institutionUniversity of California, San Diego NIH-funded
Lab location1 site (La Jolla, United States)
Project IDNIH-11143902 on NIH RePORTER

What this research studies

When pregnant mothers receive antibiotics like ampicillin to prevent infections in their newborns, it can sometimes change the helpful bacteria in the baby's gut. At the same time, breast milk contains unique sugars that are known to support a healthy gut and immune system in infants. We want to understand how these two factors—antibiotic exposure and breast milk—interact to influence a baby's early health. Our goal is to learn more about these effects to help guide better care for newborns.

Who could benefit from this research

Good fit: This research is relevant to newborns who have been exposed to ampicillin during birth and are receiving breast milk.

Not a fit: Patients who are not infants or whose mothers did not receive ampicillin during childbirth would not directly benefit from this specific research.

Why it matters

Potential benefit: If successful, this work could lead to new recommendations for antibiotic use during childbirth or strategies to enhance the benefits of breast milk, improving infant health.

How similar studies have performed: Research on the infant microbiome and the effects of antibiotics and breast milk is an active and growing field, with many studies highlighting their importance for health.

Where this research is happening

La Jolla, United States

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.