Streptococcus Suis Isolated from Pigs in Finland

Sihvonen, Liisa; Kurl, Daya N.; Henrichsen, Jørgen

doi:10.1186/bf03548386

Cited by 42 publications

(7 citation statements)

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“…Certain characteristics, such as ß-glucuronidase, arginine dihydrolase, and production of acid from mannitol should be questioned. Other investigators have reached the same conc1usion 13,22 (Gottschalk M, Higgins R, Mittal KR, Jacques M: 1989, Abstr 5th Int Symp World Assoc Vet Lab Diagn #101).…”

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confidence: 80%

“…Since then, several workers have studied the biochemical characteristics of different capsular types of S. suis, and it is now obvious that the exclusive use of the above mentioned tests can lead to the misidentification of many S. suis isolates. Several authors considered arginine dihydrolase and production of acid from inulin as variable characteristics for the identification of S. suis 11,13,22 It has also been shown that neither the raffinose fermentation test nor any other test can be used to differentiate one capsular type from another. Detection of group D antigen was considered another useful test for the identification of S. suis, 2,21 but other investigators 13,14,22 do not recognize this antigenic determinant as a specific characteristic.…”

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confidence: 99%

“…In most countries, capsular type 2 is currently the cause of most S. suis infections, 4,10,[24][25][26] whereas in Denmark and Finland, capsular type 7 appears to be most prev-a1ent. 20,22 Efforts are presently directed toward the establishment of a definitive serotyping system with the aim of making it accessible to every diagnostic laboratory. The development of this system is a prerequisite for further studies on the pathogenicity of the different capsular types, for the understanding of the physiopathology of the infection, and for the production of vaccines.…”

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confidence: 99%

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An Update on Streptococcus Suis Identification

1990

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Streptococcus suis is a worldwide cause of a variety sular type 2 isolate was recovered in pure culture from of porcine infections. It has been isolated from cases lungs and kidneys of a 4½-month-old aborted bovine of meningitis, bronchopneumonia, arthritis, pericar-fetus and its placenta. This suggests that S. suis may ditis, endocarditis, polyserositis, septicemia, rhinitis, be pathogenic for more than 1 animal species. and abortion.20,22,24 Different alpha-hemolytic strep-In Canada, it was reported that 94% of 4-8-weektococci were ascribed to Lancefield groups R, S, RS, old clinically healthy piglets harbored S. suis in their and T in 1963.5 Other investigators working with cap-nasal cavities, and 79% of these isolates did not belong sulated streptococci similar to de Moor's groups S and to the 9 capsular types.3 Recently, we demonstrated R realized that the polysaccharides involved in sero-that almost 90% of these untypeable isolates belong to typing originated from the capsular material rather than only 4 of the new capsular types (types 17, 18, 19, and from the cell wall. They considered these isolates as a 21, unpublished data). Other investigators have atnew species (Streptococcus suis) within the Lancefield tributed the development of rhinitis4,7,22 to untypeable group D, with 2 capsular types: 1 and 2, respectively. S. suis isolates. At this time, it is not possible to know The de Moor's group RS was also added as S. suis type whether any of the capsular types of S. suis belong to ½.26 In 1983, 6 new capsular types of S. suis origi-the normal flora of the nasal cavity or whether they nating from diseased pigs were described. 20 In 1987 represent real pathogens. Of the new capsular types, the species was officially recognized, l4 but the authors types 9 and 22 are more frequently found in diseased demonstrated by DNA hybridization that S. suis was pigs than in healthy ones. An outbreak of S. suis type not closely related to group D streptococci.9 infection recently occurred in swine in Canada? Despite the presence of 9 capsular types of S. suis, Although 22 of 23 capsular types of S. suis are present untypeable isolates were still frequently reported. These in North America, our studies revealed that almost isolates were recovered from diseased4,10,12,13,22,24,25 and 30% of isolates recovered from diseased pigs are still clinically healthy pigs. 2,3,21 More recently, 14 new capuntypeable (unpublished data). sular types have been described.9 Some of the reference As the number of capsular types increases, serotypstrains originated from diseased pigs, whereas others ing becomes more complicated, and it could soon bewere from the nasal cavities of clinically healthy pigs. come limited to reference laboratories. Even biochem-One strain was isolated from a diseased calf (capsular ical identification, when used alone, can be misleading. type 20) and another from a human case of meningitis Thus, veterinary diagnostic laboratories face a difficult (capsular type 14). Isolates belonging to capsular type situation...

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confidence: 80%

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confidence: 99%

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confidence: 99%

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An Update on Streptococcus Suis Identification

1990

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“…Animals at different production stages harbored isolates with similar phenotypic and genetic profiles, highlighting the importance of healthy animals in the maintenance of strains responsible for outbreaks of clinical disease (Luque et al, 2010). Even if pigs are infected with S. suis, the emergence of a clinically apparent disease varies periodically and is generally below 5% (Sihvonen et al, 1988).…”

Section: Introductionmentioning

confidence: 99%

“…The most prominent feature of S. suis infection in pigs and humans is meningitis. Infections caused by this species may also manifest as arthritis, endocarditis, pneumonia, rhinitis, vaginitis, and abortion (Sanford and Tilker, 1982;Sihvonen et al, 1988) . Human infections caused by S. suis are considered to be sporadic, mostly in people who come in contact with pigs and their products (Arends and Zanen, 1988).…”

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confidence: 99%

Biochemical characteristics of Streptococcus suis strains isolated from healthy and deceased pigs

et al. 2014

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The aim of this study was to determine the biochemical properties of Streptococcus suis strains isolated from healthy and deceased pigs. For this research we tested 34 S. suis strains isolated from deceased pigs that had clinical signs of septicemia and meningitis, as well as from clinically healthy pigs. The strains that have been already confirmed with specific antisera were tested using commercial battery of biochemical tests (API 20 Strep and ID 32 Strep) to determine the dominant biochemical characteristics that can be used in diagnosis of bacterial infection if specific S. suis antisera are not available. The main results showed that all S. suis strains were postive in esculine, trehalose, glycogen, lactose, sacharose, starch, leucine aminopeptidase, alanine-phenyl-alanine-proline arylamidase tests, while negative in Voges-Proskauer, hipurate, ribose, arabinose and sorbitol tests. S. suis strains were in high percentage positive in arginine dihydrolase, ?-glucoronidase, ?-galactosidase, ?-galactosidase, methyl-?-dglucopyranoside, glycyl-tryptophan arylamidase and inulin tests. Athough S. suis is in highly positive in some tests, it can be concluded that Voges-Proskauer, hipurate, trehalose, esculine tests, along with ?-glucoronidase (?GUR) and ?- galactosidase (?GAL), were significant in differentiation of this bacteria from other similar streptococci, along with some other crucial features (? hemolysis on blood sheep agar, absence of growth in 6,5% NaCl broth). [Projekat Ministarstva nauke Republike Srbije, br. TR 31053]

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