FIG. 6.
Boosting LVS-vaccinated mice with NMFTA1 but not LVS increases their resistance to i.n. NMFTA1 challenge. (A and B) LVS-vaccinated BALB/c mice (four to six per group) were boosted i.n. with 2 × 102 CFU of NMFTA1 and 21 days later were challenged i.n. with 2 × 103 CFU of NMFTA1 (A) or 5 × 104 CFU of LVS (B). (C and D) Vaccinated BALB/c mice (five per group) were boosted i.n. with 2 × 102 CFU of NMFTA1 (C) or 5 × 104 CFU of LVS (D) and challenged i.n. 21 days later with the indicated doses of NMFTA1.