Delayed-Type Hypersensitivity Determination

Delayed-type hypersensitivity responses in the skin (in the case of mice, in the foot pad) is used to assess cell-mediated immunity (CMI) in vivo. In the case of CMI to Helicobacter infection, the mice are given an injection of cultured Helicobacter organisms into the hind footpad, and induration is measured at the site of inoculation 24 h after inoculation. Here we describe the methods for assessing delayed-type hypersensitivity in the mouse.