title: Actinobacillus pleuropneumoniae osteomyelitis in pigs demonstrated by fluorescent in situ hybridization.
abstract: Necrotizing osteomyelitis and fibrinopurulent arthritis with isolation of Actinobacillus pleuropneumoniae serotype 2 is reported in two pigs from a herd with lameness and mild coughing problems among 8 to 12-week-old pigs. Application of fluorescent in situ hybridization targeting 16S ribosomal RNA of A. pleuropneumoniae in formalin-fixed tissue was performed to verify the association of A. pleuropneumoniae with the bone and joint lesions. By in situ hybridization A. pleuropneumoniae was demonstrated as multiple microcolonies or single cells dispersed in focal fibrinonecrotizing pleuropneumonia, in joints with arthritis, and in bone necroses including lysis of growth plate and suppurative inflammation in the adjacent trabecular metaphysis, thus demonstrating that well-known infections manifest new, unusual lesions.
authors.forename: T K
authors.initials: TK
authors.lastname: Jensen
authors.forename: M
authors.initials: M
authors.lastname: Boye
authors.forename: T
authors.initials: T
authors.lastname: Hagedorn-Olsen
authors.forename: H J
authors.initials: HJ
authors.lastname: Riising
authors.forename: O
authors.initials: O
authors.lastname: Angen
mesh_terms: D000189:Actinobacillus Infections / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*; D016977:Actinobacillus pleuropneumoniae / Q000235:genetics / Q000302:isolation & purification / Q000472:pathogenicity*; D000818:Animals; D015342:DNA Probes / Q000737:chemistry; D006614:Hindlimb / Q000473:pathology; D017404:In Situ Hybridization, Fluorescence / Q000662:veterinary; D007596:Joints / Q000473:pathology; D007794:Lameness, Animal; D008856:Microscopy, Fluorescence / Q000662:veterinary; D010019:Osteomyelitis / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*; D011001:Pleuropneumonia / Q000175:diagnosis / Q000382:microbiology / Q000662:veterinary*; D012329:RNA, Bacterial / Q000737:chemistry; D012336:RNA, Ribosomal, 16S / Q000737:chemistry; D012680:Sensitivity and Specificity; D013552:Swine; D013553:Swine Diseases / Q000175:diagnosis / Q000382:microbiology*
chemical_list: D015342:DNA Probes; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S