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Streptococcus suis 89-590

ABSTRACT: Streptococcus suis 89-590 Genome sequencing and assembly

PROVIDER: PRJNA171446 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ALLY01.dat.gz	Other
	ALLY01.fasta.gz	Fasta.gz
	ALLY01.master.dat	Other
	ALLY01.dat.gz	Other

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Genome wide analysis of C57BL-6 mice infected with North-American strain (89-1591) of Streptococcus suis

Project description:Streptococcus suis is a major swine pathogen that can be transmitted to humans causing severe symptoms. A large human outbreak was described in China, where approximately 25% out of 215 infected humans developed an unusual streptococcal toxic shock-like syndrome (STSLS). Albeit increased expression of inflammatory mediators following infection by the Chinese S. suis strain was suggested as responsible for STSLS case severity, the mechanisms involved are still poorly understood. In this study, we investigated the host innate immune response to infection by either one of 3 strains of S. suis: 89-1591 (Canadian, intermediate virulence), P1/7 (European, high virulence), and SC84 (Chinese, epidemic strain). Using Illumina microarray and validating those results with qPCR and Luminex assay, infected mice showed elevated expression of mainly pro-inflammatory chemokine and cytokine genes. Generally, pro-inflammatory genes were expressed at a higher level in mice infected with S. suis strain SC84 > P1/7 > 89-1591. Interestingly, IFNM-NM-3 was expressed at much higher levels only in mice infected with the S. suis strain SC84, which could potentially explain some of the STSLS symptoms. IFNM-NM-3-KO mice infected with SC84 showed better survival than WT mice while no differences was seen in mice infected with highly virulent P1/7 strain. Overall, our results show an important role of IFNM-NM-3 in S. suis infections and might explain in part the increased virulence of SC84 responsible for a recent outbreak in China. Total RNA obtained from spleen of C57BL/6 mice infected with Streptococcus suis strain 89-1591 or mock-infected with THB. Four replicates in both groups.

2013-03-27 | E-GEOD-41520 | biostudies-arrayexpress

Genome wide analysis of C57BL-6 mice infected with North-American strain (89-1591) of Streptococcus suis

Project description:Streptococcus suis is a major swine pathogen that can be transmitted to humans causing severe symptoms. A large human outbreak was described in China, where approximately 25% out of 215 infected humans developed an unusual streptococcal toxic shock-like syndrome (STSLS). Albeit increased expression of inflammatory mediators following infection by the Chinese S. suis strain was suggested as responsible for STSLS case severity, the mechanisms involved are still poorly understood. In this study, we investigated the host innate immune response to infection by either one of 3 strains of S. suis: 89-1591 (Canadian, intermediate virulence), P1/7 (European, high virulence), and SC84 (Chinese, epidemic strain). Using Illumina microarray and validating those results with qPCR and Luminex assay, infected mice showed elevated expression of mainly pro-inflammatory chemokine and cytokine genes. Generally, pro-inflammatory genes were expressed at a higher level in mice infected with S. suis strain SC84 > P1/7 > 89-1591. Interestingly, IFNγ was expressed at much higher levels only in mice infected with the S. suis strain SC84, which could potentially explain some of the STSLS symptoms. IFNγ-KO mice infected with SC84 showed better survival than WT mice while no differences was seen in mice infected with highly virulent P1/7 strain. Overall, our results show an important role of IFNγ in S. suis infections and might explain in part the increased virulence of SC84 responsible for a recent outbreak in China.

2013-03-27 | GSE41520 | GEO

Mutation Mapping of 40 Streptococcus suis strains

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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