Eosinophil are activated by
ref Robbins 8/e p200; IL 5 is required for the development and maturation of eosinophil Through binding to the interleukin-5 receptor, interleukin 5 stimulates B cell growth and increases immunoglobulin secretion - primarily IgA. It is also a key mediator in eosinophil activation.
IL 1
IL5
IL4
IL6
General anatomy