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Population analysis of Streptococcus suis isolates from slaughtered swine by use of minimum core genome sequence typing.


ABSTRACT: Streptococcus suis, an important zoonotic pathogen, is a highly diverse species with only a subset of strains that cause disease in humans. Our previous study proposed a minimum core genome (MCG) sequence typing method and defined seven MCG groups, with MCG group 1 as the prevalent group causing human infections. In this study, we identified a set of 10 single nucleotide polymorphisms (SNPs) distributed in six genes that were used to identify the seven MCG groups. The 10 SNPs were typed for 179 S. suis isolates collected from slaughtered pigs. The most prevalent groups among the tested isolates were MCG groups 6 and 7. Most of the isolates (147/179) were genotyped as mrp negative, epf negative, sly negative, and CDS2157 positive. The 179 isolates were also typed by multilocus sequence typing (MLST) and divided into 115 sequence types (STs), 111 of which were new. The 6 serotypes (29, 11, 5, 12, 30, and 2) represented 72.3% of the serotyped isolates. Our data show that the typing assay facilitates the application of genome data to the surveillance of S. suis.

SUBMITTER: Zheng H 

PROVIDER: S-EPMC4187759 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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Population analysis of Streptococcus suis isolates from slaughtered swine by use of minimum core genome sequence typing.

Zheng Han H   Ji Shaobo S   Lan Ruiting R   Liu Zhijie Z   Bai Xuemei X   Zhang Wen W   Gottschalk Marcelo M   Xu Jianguo J  

Journal of clinical microbiology 20140723 10


Streptococcus suis, an important zoonotic pathogen, is a highly diverse species with only a subset of strains that cause disease in humans. Our previous study proposed a minimum core genome (MCG) sequence typing method and defined seven MCG groups, with MCG group 1 as the prevalent group causing human infections. In this study, we identified a set of 10 single nucleotide polymorphisms (SNPs) distributed in six genes that were used to identify the seven MCG groups. The 10 SNPs were typed for 179  ...[more]

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