Helminths revive to survive

Helminth parasites are well known to have co-evolved a diverse arsenal of immunomodulatory factors to aid their persistence following infection. In this issue, Karo-Atar et al. (2022. J. Exp. Med. https://doi.org/10.1084/jem.20212311) demonstrate that products released by the gut-dwelling helminth Heligmosomoides polygyrus barkeri modify intestinal stem cells into a “revival” state, which is associated with a loss of helminth-expelling secretory cell types from the epithelium.