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FIG. 3.

FIG. 3

FIG. 3

Switch of a TH2 to a TH1 response in susceptible C3H mice after i.p. infection. Animals from the resistant (BALB/c) (a) and the susceptible (C3H) (b) mouse strains were infected i.p. with 107 PFU of MV (strain Edmonston). Other groups of C3H mice were infected i.p. with 107 PFU of MV (strain Edmonston) and coinjected with MAbs against IL-4 and IL-10 or heat-inactivated E. coli (as a source of LPS). Supernatants from MV-specific CD4+ T cells (derived from spleen cells) were assayed 48 to 72 h after stimulation for the presence of IFN-γ, IL-4, IL-5, and IL-10 by ELISA (c).