title: Systemic Streptococcus dysgalactiae subspecies equisimilis infection in a Yorkshire pig with severe disseminated suppurative meningoencephalomyelitis.
abstract: An 18-week-old female breeding Yorkshire pig displayed symptoms of astasia and subsequently died. Histologically, severe disseminated suppurative meningoencephalomyelitis was detected, as were numerous myocardial microabscesses. Gram-positive cocci were detected in these suppurative lesions, and these cocci reacted with an antibody against Streptococcus C group species. Gram-positive cocci were isolated from the liver, spleen, kidney, heart, lungs, pleural abscess and articular fluid of the right tarsal joint. The isolates were β-hemolytic, categorized into Lancefield group C and were identified as Streptococcus dysgalactiae subspecies equisimilis by analysis of the 16S ribosomal DNA sequence. This is the first report of systemic S. equisimilis infection in a pig with severe disseminated suppurative meningoencephalomyelitis.
authors.affiliation: Pathological and Physiochemical Examination Division, Laboratory Department, Animal Quarantine Service, 11-1 Haramachi, Isogo, Yokohama, Kanagawa 235-0008, Japan.
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Kasuya
authors.forename: Eiji
authors.initials: E
authors.lastname: Yoshida
authors.forename: Rieko
authors.initials: R
authors.lastname: Harada
authors.forename: Mio
authors.initials: M
authors.lastname: Hasegawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Osaka
authors.forename: Masaharu
authors.initials: M
authors.lastname: Kato
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Shibahara
mesh_terms: D000818:Animals; D001483:Base Sequence; D017809:Fatal Outcome; D005260:Female; D008590:Meningoencephalitis / Q000662:veterinary*; D008969:Molecular Sequence Data; D009206:Myocardium / Q000473:pathology; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA / Q000662:veterinary; D013290:Streptococcal Infections / Q000662:veterinary*; D013291:Streptococcus / Q000235:genetics*; D034421:Sus scrofa; D013552:Swine; D013553:Swine Diseases / Q000382:microbiology*; D013640:Tarsal Joints / Q000382:microbiology; D014781:Viscera / Q000382:microbiology
chemical_list: D012336:RNA, Ribosomal, 16S