has role immunizes against pathogen Actinobacillus pleuropneumoniae vaccine in research role Actinobacillus pleuropneumoniae vaccine Actinobacillus pleuropneumoniae apxIIIB and apxIIID double mutant vaccine Oliver He vaccine VIOLIN: https://violinet.org/vaxquery/vaccine_detail.php?c_vaccine_id=3119 Rebecca Racz An apxIIIB mutant, in combination with an apxIIID mutation, is highly attenuated in pigs and induces significant protection from challenge with wild type A. pleuropneumoniae. The mutant also was slightly attenuated in mice and induced protection in mice against challenge from the parent strain An apxIIID mutant, in combination with an apxIIIB mutation, is highly attenuated in pigs and induces significant protection from challenge with wild type A. pleuropneumoniae. The mutant also was slightly attenuated in mice and induced protection in mice against challenge from the parent strain 3119