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Antibiotics from human use are contaminating rivers worldwide, study shows

  • A McGill University-led study published in May 2025 reveals that human antibiotic use contaminates millions of kilometers of rivers worldwide.
  • The team applied a worldwide modeling approach, calibrated with data from 877 sites, to estimate that approximately 8,500 tonnes of antibiotics enter rivers each year following human use and wastewater processing.
  • The study highlights that nearly one-third of consumed antibiotics reach rivers at concentrations that can harm aquatic life and promote antimicrobial resistance, with amoxicillin responsible for 45% of at-risk river lengths.
  • Lead author Heloisa Ehalt Macedo highlighted that antibiotics can disperse widely from their points of origin, emphasizing that their persistence in the environment represents a global challenge with significant implications for ecosystem and human health.
  • The findings call for urgent global monitoring, improved wastewater treatment, and management strategies to reduce antibiotic pollution and mitigate its impact on ecosystems and human health.
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Science Daily broke the news in United States on Friday, May 9, 2025.
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