Dr. Srivas is studying the changes in the composition and function of bacteria inhabiting the human gut (microbiome). The microbiome plays an extensive role in modulating host metabolism and inflammation, which when disrupted can lead to diseases such as cancer. There has been much interest in understanding this relationship between the microbiome and human cancers. By tracking changes in the gut microbiome of patients undergoing drastic weight loss, this research will map the dynamics of host-microbiome connections, potentially highlighting strategies for modifying the microbiome to treat metabolic disorders and reduce the risk of gastric and colon cancers.