Streptococcus suis infections in pigs in the Netherlands (Part I)

Vecht, U.; Leengoed, L.A.M.G. van; Verheijen, E. R. M.

doi:10.1080/01652176.1985.9694005

Cited by 63 publications

(42 citation statements)

References 10 publications

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“…Streptococcus suis is an important cause of a wide variety of infections in pigs, such as meningitis, pneumonia, septicaemia, and arthritis (4,34). S. suis has also been described as a pathogen for humans (1,33) as well as for other mammalian and bird species (7).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic diversity of Streptococcus suis strains of various serotypes as revealed by 16S rRNA gene sequence comparison

Chatellier

Harel

Zhang

et al. 1998

International Journal of Systematic Bacteriology

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The 165 rRNA gene sequences of reference strains of Streptococcus suis serotypes 1-34 and 1/2 were determined. A comparative sequence analysis showed that the degree of sequence similarity between 5. suis reference strains ranged from 93-94 to 100°/~. A dendrogram was constructed from the similarity matrix. Thirty-two strains representing 32 serotypes fell into a major group divided into three clusters. The other strains, 5. suis serotypes 32,33 and 34, were more distant. Biochemical characterization of the six more distant strains, including 5. suis serotypes 20,22, 26, 32, 33 and 34, revealed a profile similar to that of other 5. suis serotypes. Comparison of the 165 rRNA gene sequences of 5. suis reference strains with sequences of other members of the genus Streptococcus indicated that, with the exception of 5. suis serotypes 32, 33 and 34, reference strains did not cluster with any other species in the genus. In conclusion, 165 rRNA gene sequence analysis defined a major group of 5. suis reference strains which were very closely related and a higher divergence for 5. suis serotypes 32,33 and 34. However, to date, there is no strong evidence to reclassify strains of these serotypes in another species.

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Section: Introductionmentioning

confidence: 99%

Phylogenetic diversity of Streptococcus suis strains of various serotypes as revealed by 16S rRNA gene sequence comparison

Chatellier

Harel

Zhang

et al. 1998

International Journal of Systematic Bacteriology

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“…This result is markedly different from the frequencies reported in the literature for SS-2-induced arthritis. 2,15,22,24,28 Arthritis was not reported in 1 study based solely on gross diagnosis. 24 Other authors have reported values of 1% 22 and 6%, 2,28 indicating that SS-2-induced arthritis is infrequently diagnosed in the natural disease.…”

Section: Discussionmentioning

confidence: 70%

“…2,15,22,24,28 Arthritis was not reported in 1 study based solely on gross diagnosis. 24 Other authors have reported values of 1% 22 and 6%, 2,28 indicating that SS-2-induced arthritis is infrequently diagnosed in the natural disease. The discrepancy in frequency of arthritis between our SS-9 and natural SS-2 infections is too great to dismiss as merely due to procedural variations.…”

Section: Discussionmentioning

confidence: 70%

“…Isolation is most often from cases of pneumonia 7,13,22,24,28 and meningitis. 2,22,24,28 Several other lesions, including endocarditis, 5,15,20,22,28 fibinopurulent pericarditis, and hemorrhagic and necrotizing myocarditis, are also produced by SS-2. 20,21 Several types are found mainly in healthy pigs, notably type 21 and to a lesser extent, types 17, 18, and 19.…”

Section: Streptococcus Suis Type 2 (Ss-2) Often Affects Pigs 4-16 Weementioning

confidence: 99%

“…2,15,28 arthritis 2,10,22,24,28 meningitis, 2,22,24,28 pneuendocarditis, 5,15,20,22,28 may enhance our understanding of the pathogenesis of monia,…”

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confidence: 99%

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Lesions Caused by Natural Infection withStreptococcus SuisType 9 in Weaned Pigs

1994

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Abstract. In this paper we report on the spectrum and frequency of lesions observed in a prospective study of naturally occurring infections with Streptococcus suis type 9 (SS-9) in weaned pigs. SS-9 produced arthritis, meningitis, interstitial pneumonia, and endocarditis in 100%, 91%, 73%, and 42%, respectively, of pigs dying from the disease. The lesions were similar to those caused by S. suis type 2 (SS-2), however, SS-9 produced a different frequency of lesions. In SS-2 infections, bronchopneumonia is the most commonly observed lesion; meningitis, arthritis, and endocarditis are less frequently observed. Thus, SS-9 produced a different distribution of lesions from that reported for SS-2. Possible explanations for the differences found are discussed.Since its discovery as a cause of meningoencephalitis are the basis for the suggestion that these antigens play and pneumonia in pigs 1-6 months of age, 5 Strepto-a role in the pathogenesis of the disease. 19 Investigation coccus suis has been isolated from cases of septice-into differences among lesions caused by various types mia.2,15,28 arthritis 2,10,22,24,28 meningitis, 2,22,24,28 pneuendocarditis, 5,15,20,22,28 may enhance our understanding of the pathogenesis of monia, 13,22,24,28and numerous S. suis infections. The spectrum and frequency of leother lesions .20,21 Differences have been noted among sions observed in a prospective study of naturally ocvarious serotypes. Streptococcus suis type 1 (SS-1) gen-curring porcine SS-9 infections are described in this erally affects nursing piglets 1-3 weeks of age 4 and caus-report. es meningitis, arthritis, and septicemia. 17, 18, and 19. 8,9 Thus, it appears that there are differences in both virulence and lesions caused by the various types of S. suis.Whereas SS-2 is the most common type reported in most countries, 11,12,25 other types are prevalent in specific regions. In Finland and Denmark, S. suis type 7 (SS-7) is the most common 2,23 and is comparable to SS-1 in virulence, tissue tropism, and age of pig affected.2 In Australia, SS-9 is most common. 7Although the capsular antigens are not the only important virulence factors, 18,19,29,30 they are used in diagnostic laboratories to distinguish among isolates. 8,9 Correlations between capsular antigens and virulence Received for publication October 19, 1993. All pigs were from a minimal disease (caesarian-sectionderived Landrace crossbred parent stock) farrow-to-finish herd of 200 sows, known to be free of Mycoplasma hyopneumoniae infection but with an approximate mortality of 6% of weanlings as a result of SS-9 infection. The majority of postweaning deaths were examined. In 33 pigs, SS-9 was isolated in greater numbers than any other pathogen from at least 1 organ other than joint. These isolations were considered to be systemic cases of SS-9 infection and are reported here. Pigs ranged in age from 32 days to 4 mo. Three of the 4 pigs that were submitted moribund were euthanized by intravenous barbiturate injection and 1 was euthanized by halothane inhal...

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