Porcine Hemophilus parahemolyticus pneumonia in Saskatchewan. II. Bacteriological and experimental studies.
The incidence of porcine pleuropneumonia caused by Hemophilus parahemolyticus has shown a marked increase in recent years in some countries. Isolation of a strain distinct from European serotypes was made from a natural outbreak of the disease in pigs in Saskatchewan. Experimentally infected pigs did not develop clinical signs but pathologic-anatomic studies of lungs revealed the presence of necrotizing fibrinous pneumonia with intense proliferation of mesenchymal tissue elements. Similar extensive fibroblastic activity had been found to be a typical feature in the natural infection. It is speculated that the Saskatchewan strain may have invasive patterns different from European serotypes.
D000818:Animals; D006192:Haemophilus Infections / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D008168:Lung / Q000473:pathology; D011001:Pleuropneumonia / Q000209:etiology / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D012525:Saskatchewan; D013552:Swine; D013553:Swine Diseases / Q000209:etiology* / Q000382:microbiology / Q000473:pathology