From hakaimagazine: Scientists are worried that plastics in the ocean are serving as breeding grounds for dangerous pathogens.
That microplastic pollution appears to be a breeding ground for pathogens raises, for Vos, a long-term concern as well—that plastics might be promoting the spread of antibiotic resistance. Bacteria can exchange genes, and since the bacteria are in close contact on the surface of tiny microplastics, the level of horizontal gene transfer between them is high, he said. Plastics can also put bacteria in close contact with pesticides and other pollutants, which similarly stick to biofilms.
In addition to posing potential risks to human health, plastic-borne pathogens could threaten marine ecosystems and food supply chains, Amaral Zettler said. Millions of people rely on seafood as a source of protein, and there are many pathogens that infect the fish and shellfish we eat. It might be possible, Amaral Zettler said, for microplastics to spread diseases between different aquaculture and fishing areas.
Even though we don’t fully understand the risks, these studies are yet another good argument for limiting plastic pollution. “There can’t be anything positive about plastics with pathogens floating around,” Vos said.
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