Lab mice receiving gut bacteria from obese humans are likely to put on more weight compared to those given bacteria from the gut of lean humans US researchers say. The findings demonstrate the transmission of the physical and metabolic traits via gut microbes and represent an important step towards developing anti-obesity treatment with bacteria Xinhua reported citing the Science journal. (Also read: Obesity killing millions around the world every year!) Researchers from the Washington University recruited four human twin pairs - two obsese and two lean - and transferred the gut microbiota from each of them into the guts of