Fig. 3.
Effect of primary L. major infection on delayed type hypersensitivity (DTH) response to secondary L. major infection in BALB/ mice. Mice received 105 L. major in the ear as the primary infection followed 2-3 mo later by 106 L. major in the footpad as the secondary infection. DTH were determined in the footpad after the secondary infection. Footpad thickness increase was defined as thickness of infected footpad minus thickness of contralateral uninfected footpad. Data are footpad increase of individual mice.