Abstract Background Actinobacillus pleuropneumoniae is the causative agent of porcine contagious pleuropneumonia. a highly contagious respiratory infection in pigs. and all the 15 serotypes are able to cause disease. Current vaccines including subunit vaccines could not provide satisfactory protection against A. https://www.countryscenesaddleryandpetsuppliers.shop/product-category/rough-rider/