Study finds antibiotics before age 2 associated with childhood health issues

November 16, 2020

ROCHESTER, Minn. -- In a retrospective case study, Mayo Clinic researchers have found that antibiotics administered to children younger than 2 are associated with several ongoing illnesses or conditions, ranging from allergies to obesity. The findings appear in Mayo Clinic Proceedings.

Using health record data from the Rochester Epidemiology Project, a population-based research collaboration in Minnesota and Wisconsin, researchers analyzed data from over 14,500 children. About 70% of the children had received at least one treatment with antibiotics for illness before age 2. Children receiving multiple antibiotic treatments were more likely to have multiple illnesses or conditions later in childhood.

Types and frequency of illness varied depending on age, type of medication, dose and number of doses. There also were some differences between boys and girls. Conditions associated with early use of antibiotics included asthma, allergic rhinitis, weight issues and obesity, food allergies, attention deficit hyperactivity disorder, celiac disease, and atopic dermatitis. The authors speculate that even though antibiotics may only transiently affect the microbiome, the collection of microbes in the body, this may have long-term health consequences.

"We want to emphasize that this study shows association ? not causation ? of these conditions," says Nathan LeBrasseur, Ph.D., a researcher at Mayo Clinic's Robert and Arlene Kogod Center on Aging and the study's senior author. "These findings offer the opportunity to target future research to determine more reliable and safer approaches to timing, dosing and types of antibiotics for children in this age group."

While recent data show an increase in some of the childhood conditions involved in the study, experts are not sure why. Other than the issue of multidrug resistance, antibiotics have been presumed safe by most pediatricians.

Researchers also say the ultimate goal is to provide practical guidelines for physicians on the safest way to use antibiotics early in life.
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Other coauthors of the study are Zaira Aversa, M.D., Ph.D., first author; Elizabeth Atkinson; Marissa Schafer, Ph.D.; Regan Theiler, M.D., Ph.D.; and Walter Rocca, M.D. ? all of Mayo Clinic ? and Martin Blaser, M.D., of Rutgers University.

The study was supported by the Pritzker Foundation, Leonard and Mary Lou Hoeft Fund in Healthy Aging and Independent Living Research, Rochester Epidemiology Project, C&D Fund, and Transatlantic Networks of Excellence of the Leducq Foundation.

The Rochester Epidemiology Project has been supported by the National Institutes of Health since its inception more than 50 years ago.

About Mayo Clinic

Mayo Clinic is a nonprofit organization committed to innovation in clinical practice, education and research, and providing compassion, expertise and answers to everyone who needs healing. Visit the Mayo Clinic News Network for additional Mayo Clinic news and Mayo Clinic Facts for more information about Mayo.

About Mayo Clinic Proceedings

Mayo Clinic Proceedings is a monthly peer-reviewed medical journal that publishes original articles and reviews dealing with clinical and laboratory medicine, clinical research, basic science research, and clinical epidemiology. Mayo Clinic Proceedings is sponsored by the Mayo Foundation for Medical Education and Research as part of its commitment to physician education. The journal has been published for more than 90 years and has a circulation of 127,000. Visit the Mayo Clinic Proceedings website to view articles.

Media contact:

Bob Nellis, Mayo Clinic Public Affairs, newsbureau@mayo.edu

Mayo Clinic

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