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. Author manuscript; available in PMC: 2010 Sep 18.
Published in final edited form as: Vaccine. 2009 Aug 3;27(41):5554–5561. doi: 10.1016/j.vaccine.2009.07.034

Fig. 4.

Fig. 4

Protective immunity induced by KKF235 immunization is IFN-γdependent. (A) Spleens were collected from KKF235 i.n. immunized BALB/c mice, single cells prepared, and assayed for KKF235 induced IFN-γ with UV-inactivated KKF235 (105 CFU). HEL, an unrelated antigen, was used as a control stimulus. (B) BALB/c IFN-γ-/- mice and IFN γ+/+ mice (n=5) were vaccinated i.n. with KKF235 (106 CFU) or mock vaccinated with PBS. Animals were challenged 30 days later with 1000 CFU of U112 (∼100 LD50). All animals were monitored daily for survival. Difference in survival between KKF235 vaccinated IFN γ+/+ and IFN γ-/- mice was significant at p < 0.005.