Distribution and function of plasmids in Salmonella enterica

被引：140

作者：

Rychlik, I ^{[1
]}

Gregorova, D ^{[1
]}

Hradecka, H ^{[1
]}

机构：

[1] Vet Res Inst, CS-62132 Brno, Czech Republic

来源：

VETERINARY MICROBIOLOGY | 2006年 / 112卷 / 01期

关键词：

virulence plasmid; antibiotic resistance; phage type; restriction modification system; plasmid incompatibility; gene expression;

D O I：

10.1016/j.vetmic.2005.10.030

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Plasmids of Salmonella enterica vary in size from 2 to more than 200 kb. The best described group of plasmids are the virulence plasmids (50-100 kb in size) present in serovars Enteritidis, Typhimurium, Dublin, Cholerae-suis, Gallinarum, Pullorum and Abortus-ovis. They all encode spvRABCD genes involved in intra-macrophage survival of Salmonella. Another group of high molecular weight plasmids are plasmids responsible for antibiotic resistance. Since most of these plasmids are conjugative, besides storage of genetic information, they contribute to the spread of genes in bacterial populations. The low molecular weight plasmids are the last group of plasmids found in S. enterica. Some of them have been shown to increase resistance to phage infection due to the presence of restriction modification systems. Despite limited knowledge on their function, their presence or absence is frequently used for strain dif.erentiation in epidemiological studies. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

共 52 条

[1] The virulence plasmid of Salmonella typhimurium is self-transmissible [J].