The physiological basis of disease tolerance in insects.

Immunology textbooks teach us about the ways hosts can recognize and kill microbes but leave out something important: the mechanisms used to survive infections. Survival depends on more than simply detecting and eliminating microbes; it requires that we prevent and repair the damage caused by pathogens and the immune response. Recent work in insects is helping to build our understanding of this aspect of pathology, called disease tolerance. Here we discuss papers that explore disease tolerance using theoretical, population genetics, and mechanistic approaches.