The TWiPerati solve the case of the Man Who Sat in Feces, and discuss a study on how Dickson’s favorite parasite induces the formation of a collagen capsule.

The TWiP trio solve the case of the Woman from Washington Heights, and reveal how helminth infection protects mice deficient in the Crohn’s disease gene NOD2 from intestinal disease by inhibiting colonization with an inflammatory bacterial species.

Vincent, Dickson, and Daniel provide the solution to last week’s case study, present a new one, and discuss how immune suppression by nematodes increases tuberculosis fatality in African buffalo.