Obesity in human beings could be caused by bacterial infection rather than eating too much, exercising too little or genetics, according to a groundbreaking 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 a 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.