has role protective antigen role protective antigen Actinobacillus pleuropneumoniae protein ApxIA Oliver He The ApxI antigen is an important factor in the protection against Actinobacillus pleuropneumoniae serotype 5 infection; therefore, the protective immunity in mice following oral immunization with Saccharomyces cerevisiae expressing either ApxIA (group C) or ApxIIA (group D) alone or both (group E) was compared with that in two control groups (group A and B). The immunogenicity of the rApxIA antigen derived from the yeast was confirmed by a high survival rate and an ApxIA-specific IgG antibody response (p < 0.01) [PubMed: 17993753]. Allen Xiang protein Protegen ID: 358; NCBI Protein GI: 312899; NCBITaxon: 715