Toxoplasma gondii is a brain-infecting parasite, and the mobilization of peripheral immune cells to the brain is critical for controlling T. gondii infection. However, the initial events driving these...

Yu and Chandra et al. engineered a commensal gut microbe, Bacteroides thetaiotaomicron, to detoxify methylmercury (MeHg). The engineered bacterium reduces MeHg in the intestinal lumen, limits its accu...