Commonly prescribed antibiotics can alter the development of mouse pups and scientists believe the same could hold true for human children.
Giving amoxicillin and tylosin to infant mice temporarily accelerated their total body mass and bone growth while causing long term changes to their gut bacteria.
The researchers say the findings indicate a need to re-examine antibiotic guidelines and risks in humans.
Previous research has looked at how low level dosages of antibiotics affects animals.
However, humans usually get ten to 100 times higher antibiotic exposures to treat acute infections.
Martin Blaser of New York University and colleagues developed a mouse model which mimics early life doses of antibiotics.
NOW WATCH: Briefing videos
Business Insider Emails & Alerts
Site highlights each day to your inbox.