Gut Microbe Variation with Latitude (image) University of California - Berkeley Share Print E-Mail Caption The researchers looked at data from more than 1,000 people from around the world. The blue represents the proportion of obesity-related bacteria in the gut (Firmicutes), while red is the proportion of bacteria associated with slimness (Bacteroidetes). Credit Taichi Suzuki/UC Berkeley & Michael Worobey/UA Tucson Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.