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Anti-PA and anti-LF IgA ELISA titers in the BAL fluid were measured 4 weeks after a single i.n. immunization with AdtPA83hu (tPAhu) or AdtLFnhu (tLFnhu) at a dose of 107 IFU per vector. All mice immunized with Adtetc vector controls and all preimmune sera had anti-PA and anti-LF IgA ELISA titers of ≤100. The results of anti-PA and anti-LF IgA ELISAs are plotted as the log10 titers. Bars are geometric means of the anti-PA or anti-LF ELISA titers.
