Island warbler study finds immune genes shape gut bacteria in the wild

Scientists at the University of East Anglia (U.K.) have uncovered a hidden link between gut health and the immune system—all thanks to a tiny island bird. Researchers studied the Seychelles warbler, a small songbird found on Cousin Island in the Seychelles. They collected the birds’ poo to analyze their gut bacteria—and found that their immune genes influence which gut microbes thrive.

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