Abstract
Unusual lesions caused by Streptococcus suis involved the heart of 48 pigs necropsied over a four-year period. Lesions included fibrinopurulent pericarditis (six pigs), hemorrhagic, necrotizing myocarditis resembling mulberry heart disease (21 pigs), and vegetative valvular endocarditis (21 pigs). Histologically, the myocarditis was characterized by focally extensive and diffuse hemorrhages and necrosis, with infiltrations of neutrophils and mononuclear cells, and thrombosis of small and large myocardial vessels. The 21 pigs with vegetative valvular endocarditis generally were over ten weeks old and had died suddenly. The left atrioventricular valve was affected in 18 hearts. Most of an affected valve was replaced by a layer of granulation tissue covered by a mixture of fibrin, inflammatory cells, necrotic debris and large numbers of coccoid bacteria.
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- Clifton-Hadley F. A. Streptococcus suis type 2 infections. Br Vet J. 1983 Jan-Feb;139(1):1–5. doi: 10.1016/s0007-1935(17)30581-x. [DOI] [PubMed] [Google Scholar]
- Erickson E. D., Doster A. R., Pokorny T. S. Isolation of Streptococcus suis from swine in Nebraska. J Am Vet Med Assoc. 1984 Sep 15;185(6):666–668. [PubMed] [Google Scholar]
- John V. S., Wilcock B., Kierstead M. Streptococcus suis Type 2 Infection in Swine in Ontario: A Review of Clinical and Pathological Presentations. Can Vet J. 1982 Mar;23(3):95–97. [PMC free article] [PubMed] [Google Scholar]
- Jones J. E. Bacterial endocarditis in the pig with special reference to streptococcal endocarditis. J Comp Pathol. 1980 Jan;90(1):11–28. doi: 10.1016/0021-9975(80)90024-9. [DOI] [PubMed] [Google Scholar]
- Jones J. E. The serological classification of streptococci isolated from diseased pigs. Br Vet J. 1976 Mar-Apr;132(2):163–171. doi: 10.1016/s0007-1935(17)34738-3. [DOI] [PubMed] [Google Scholar]
- Lamont M. H., Hunt B., Mercer R. Valvular endocarditis associated with Streptococcus suis type 2. Vet Rec. 1984 Jul 7;115(1):22–22. doi: 10.1136/vr.115.1.22-a. [DOI] [PubMed] [Google Scholar]
- Pedersen K. B., Henrichsen J., Perch B. The bacteriology of endocarditis in slaughter pigs. Acta Pathol Microbiol Immunol Scand B. 1984 Aug;92(4):237–238. doi: 10.1111/j.1699-0463.1984.tb02827.x. [DOI] [PubMed] [Google Scholar]
- Perch B., Pedersen K. B., Henrichsen J. Serology of capsulated streptococci pathogenic for pigs: six new serotypes of Streptococcus suis. J Clin Microbiol. 1983 Jun;17(6):993–996. doi: 10.1128/jcm.17.6.993-996.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sanford S. E. Gross and histopathological findings in unusual lesions caused by Streptococcus suis in pigs. II. Central nervous system lesions. Can J Vet Res. 1987 Oct;51(4):486–489. [PMC free article] [PubMed] [Google Scholar]
- Sanford S. E., Tilker M. E. Streptococcus suis type II-associated diseases in swine: observations of a one-year study. J Am Vet Med Assoc. 1982 Oct 1;181(7):673–676. [PubMed] [Google Scholar]
- Vecht U., van Leengoed L. A., Verheijen E. R. Streptococcus suis infections in pigs in the Netherlands (Part I). Vet Q. 1985 Oct;7(4):315–321. doi: 10.1080/01652176.1985.9694005. [DOI] [PubMed] [Google Scholar]
- Windsor R. S. Meningitis in pigs caused by Streptococcus suis type II. Vet Rec. 1977 Nov 5;101(19):378–379. doi: 10.1136/vr.101.19.378. [DOI] [PubMed] [Google Scholar]