Protective efficacy of ID vaccination with FSC200<i>ΔclpB versus</i> LVS against respiratory challenge with SCHU S4.

<p>BALB/c mice were immunized ID with 10⁵ CFU of LVS (square; n = 12) or FSC200<i>ΔclpB</i> (circle; n = 17) and challenged 6 weeks later IN with 86 CFU of SCHU S4. <b>*</b>, Significantly longer survival than mice immunized with LVS.