has role virmugen virmugen role Actinobacillus pleuropneumoniae gene apxIIC from Actinobacillus pleuropneumoniae VO:0002520 gene Rebecca Racz In the present study, the gene encoding the ApxII-activating protein, apxIIC, was insertionally inactivated on the chromosome of a serovar 7 strain, HS93. Pigs vaccinated with live HS93C-Ampr via the intranasal route were protected against a cross-serovar challenge with a virulent serovar 1 strain of A. pleuropneumoniae NCBI_Protein_ID: 52630373; PMID: 10085043 Oliver He