August 2015 Centers for Disease Control and Prevention (CDC)

A team from Macquarie University has proved for the first time that even low concentrations of antibiotics are polluting waterways, according to a study published today in Frontiers in Microbiology. Using low, realistic concentrations of antibiotics that might be found in waste water, the team showed a series of worrying effects on both environmental and clinical bacteria, including rearrangements of the bacterial DNA, changes in the colonies that the bacteria form, and most importantly, the evolution of antibiotic-resistant strains.

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