Fig. 7From: Attenuated Actinobacillus pleuropneumoniae double-deletion mutant S-8∆clpP/apxIIC confers protection against homologous or heterologous strain challengeBacterial loads in lung homogenates after challenge with A. pleuropneumoniae strains S-8 or K17. The logarithm value (Log10) of the CFU in each gram of tissue sample was recorded. The immunized groups were vaccinated with S-8△clp△apxIIC and the PBS control groups were injected with PBS. The results are expressed as the means ± SDBack to article page