Obesity could be caused by bacterial infection rather than eating too much, exercising too little or genetics, according to a study that could have profound implications for public health systems, the pharmaceutical industry and food manufacturers.
The discovery in China followed an eight-year search by scientists across the world to explain the link between gut bacteria and obesity.
Researchers in Shanghai identified the human bacteria linked with obesity, fed it to mice and compared their weight gain with rodents without the bacteria. The latter did not become obese despite being fed a high-fat diet and being prevented from exercising.
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