Gut Microbes Protect against Sepsis (IMAGE) Cell Press Caption This visual abstract depicts the findings of Wilmore et al., who demonstrate a role for serum IgA in protection against polymicrobial sepsis. Induction of protective concentrations of T cell dependent serum IgA requires colonization of the gut with a complex microbiota that includes bacteria in the phylum Proteobacteria. Credit Wilmore et al./Cell Host & Microbe 2018 Usage Restrictions Credit Required. License Licensed content 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.