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Streptococcus suis

ABSTRACT: Causative agent of meningitis, endocarditis, septicemia and arthritis in swine

PROVIDER: PRJNA12461 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	AEYY01.dat.gz	Other
	AEYY01.fasta.gz	Fasta.gz
	AEYY01.master.dat	Other
	ALKP01.dat.gz	Other

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Gene expression analysis of human monocytic cells (THP-1) exposure to Streptococcus suis serotype 2

2010-03-06 | GSE20508 | GEO

Gene expression analysis of human monocytic cells (THP-1) exposure to Streptococcus suis serotype 2

Project description:Streptococcus suis is an important zoonosis pathogen that causes significant economic losses worldwide characterized by meningitis, septicaemia, arthritis, bronchopneumonia endocarditis. Streptcoccus suis 2 strain SC19 was isolated in Sichuan province in China, during the outbreak in 2005. Septicemia is most popular symptoms for SC19 infection, and mortality is high. We used human acute monocytic leukemia cell line (THP-1) infected SC19 to analysis the pathomechanism of septicemia in SS2 infection. Human acute monocytic leukemia cell line (THP-1) cells were stimulated with Streptcoccus suis 2 (SS2) strain SC19. We added SS2 to THP-1 cells at a MOI of 1:1 (bacteria/cells). Uninfected control cells were incubated with PBS only. After 3 hours incubation, cells were collected for RNA extraction and hybridization on Affymetrix microarrays. A total of 4 samples were challenged, and 4 samples were used as controls. 4 microarrays were used in this experiment.

2010-04-06 | E-GEOD-20508 | biostudies-arrayexpress

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Understanding Streptococcus suis serotype 2 infection in pigs through a transcriptional approach

Project description:Streptococcus suis serotype 2 is an important pathogen of pigs, and the disease it causes is characterized by meningitis, septicaemia and pneumonia with high mortality. The pathogen is also an emerging zoonotic agent and threatens humans that are exposed to pigs or their by-products. We investigated the response of PBMC (Peripheral Blood Mononuclear Cell), brain and lung tissues to infection with S. suis 2 strain SC19 by using the Affymetrix Porcine Genome Array.

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Project description:Streptococcus suis is an important zoonotic pathogen that can cause meningitis and sepsis in both pigs and humans. In this study,we evaluated the genetic difference of 40 Streptococcus suis strains belonging to various sequence types by comparative genomic hybridization to identify genes associated with the variation in pathogenicity using NimbleGen’s tilling microarray platform. Application of Comparative Phylogenomics to Identify Genetic Differences Relating to Pathogenicity of Streptococcus suis

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Project description:Next generation sequencing analysis of Streptococcus suis ST28 isolated from a infectious endocarditis and a meningitis patient in Japan.

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Mutation Mapping of 31 Streptococcus suis strains

Project description:Identification of Genes and Genomic Islands Correlated with High Pathogenicity through Tilling Microarray-Based Comparative Genomics in S. suis. Streptococcus suis is an important zoonotic pathogen that can cause meningitis and sepsis in both pigs and humans. S. suis isolates have been categorized into groups of different levels of pathogenicity, with sequence type (ST) ST1 clonal complex strains having a higher degree of virulence than other STs. However, the genetic basis of the differences in pathogenicity is still poorly understood. In this study, a comprehensive genomic comparison of 31 S. suis strains from different clinical sources with the genome sequence of the high pathogenicity (HP) strain GZ1 was conducted using NimbleGen’s tilling microarray platform.

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Genome wide analysis of C57BL-6 mice and C57BL/6 TLR2-KO mice infected with Chinese strain (SC84) of Streptococcus suis

Project description:Streptococcus suis is an emerging zoonotic agent causing meningitis and septicemia. Outbreaks in humans in China with atypical cases of streptococcal toxic shock-like syndrome have been described to be caused by a clonal epidemic S. suis strain characterized as sequence type (ST) 7 by multilocus sequence typing, different from the classical ST1 usually isolated in Europe. Previous in vitro studies showed that Toll-like receptor (TLR) 2 plays a major role in S. suis ST1 interactions with host cells. In the present study, the in vivo role of TLR2 in systemic infections caused by S. suis ST1 or ST7 strains using TLR2 deficient (TLR2-/-) mice was evaluated. TLR2-mediated recognition significantly contributes to the acute disease caused by the highly virulent S. suis ST1 strain, since the TLR2-/- mice remained unaffected when compared to wild type (WT) mice. The lack of mortality could not be associated with a lower bacterial burden; however, a significant decrease in the induction of pro-inflammatory mediators, as evaluated by microarray, real-time PCR and protein assays, was observed. On the other hand, TLR2-/- mice infected with the epidemic ST7 strain presented no significant differences regarding survival and expression of pro-inflammatory mediators when compared to the WT mice. Together, these results show a TLR2-independent host innate immune response to S. suis that depends on the strain.

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