title: Prevalence of granulomatous pleuropneumonia associated with Actinobacillus pleuropneumoniae serotype 2 in slaughter pigs.
abstract: A total of 14,818 slaughtered pigs were examined macroscopically. Of these, 25 pigs with porcine pleuropneumonia were collected and the relations among Actinobacillus spp. and granulomatous lesions in organs (lungs and tonsils) were evaluated. In the lungs, only Actinobacillus pleuropneumoniae serotype 2 was isolated from 20 of the pigs. Histologically, granulomatous pneumonia with A. pleuropneumoniae antigen was detected in 8 of the pigs. The antigen was visible in the centers of the lesions along with asteroid bodies, epithelioid cells and multinucleated giant cells. In the tonsils, granulomatous lesions were not detected, although A. pleuropneumoniae serotype 2 (5 pigs), serotype 7 (1 pig), Actinobacillus porcitonsillarum (1 pig) and Actinobacillus minor (1 pig) were isolated. The present survey suggests that multifocal granulomatous pneumonia in slaughter pigs could be highly associated with A. pleuropneumoniae serotype 2 infection.
authors.affiliation: Toyama Prefectural Meat Inspection Center, Imizu, Japan.
authors.forename: Takemi
authors.initials: T
authors.lastname: Ohba
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Shibahara
authors.forename: Hideki
authors.initials: H
authors.lastname: Kobayashi
authors.forename: Ariko
authors.initials: A
authors.lastname: Takashima
authors.forename: Masataka
authors.initials: M
authors.lastname: Nagoshi
authors.forename: Miho
authors.initials: M
authors.lastname: Araki
authors.forename: Katsutoshi
authors.initials: K
authors.lastname: Takizawa
authors.forename: Masanori
authors.initials: M
authors.lastname: Kubo
mesh_terms: D000003:Abattoirs; D000189:Actinobacillus Infections / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D016977:Actinobacillus pleuropneumoniae; D000818:Animals; D006099:Granuloma / Q000382:microbiology / Q000473:pathology / Q000662:veterinary; D007564:Japan / Q000453:epidemiology; D008168:Lung / Q000382:microbiology / Q000473:pathology; D014066:Palatine Tonsil / Q000382:microbiology / Q000473:pathology; D011001:Pleuropneumonia / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology* / Q000473:pathology