Eight weeks after antibiotic treatment of infants, the diversity of gastrointestinal flora remained diminished, although the number of individual bacteria was back to normal, according to a paper in the November 2012 issue of the journal Antimicrobial Agents and Chemotherapy. Additionally, the potentially disease-causing Proteobacteria were now the dominant population in the treated infants.
“This is the first sequencing-based study to demonstrate the negative effects of short-term antibiotic treatment on the beneficial gut bacteria populations in infants,” says coauthor Catherine Stanton of the Teagasc Food Research Centre, Fermoy, Cork, Ireland.
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