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Systemic Streptococcus Dysgalactiae Subspecies Equisimilis Infection in a Yorkshire Pig with Severe Disseminated Suppurative Meningoencephalomyelitis

Overview
Journal J Vet Med Sci
Specialty Veterinary Medicine
Date 2014 Jan 15
PMID 24419876
Citations 9
Authors
Kazufumi Kasuya
Eiji Yoshida
Rieko Harada
Mio Hasegawa
Hiroyuki Osaka
Masaharu Kato
Tomoyuki Shibahara
Affiliations
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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.

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