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How to become a killer, or is it all accidental? Virulence strategies in oral streptococci

期刊

MOLECULAR ORAL MICROBIOLOGY
卷 33, 期 1, 页码 1-12

出版社

WILEY
DOI: 10.1111/omi.12192

关键词

regulation; Streptococcus anginosus; Streptococcus constellatus; Streptococcus intermedius; Streptococcus pneumoniae; Streptococcus pyogenes; virulence factors

资金

  1. Narodowe Centrum Nauki [N N303 822240, N N401 535940]

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Streptococci are a diverse group of Gram-positive microorganisms sharing common virulence traits and similar strategies to escape the oral niche and establish an infection in other parts of the host organism. Invasive infection with oral streptococci is a perfect storm that requires the concerted action of multiple biotic and abiotic factors. Our understanding of streptococcal pathogenicity and infectivity should probably be less mechanistic and driven not only by the identification of novel virulence factors. The observed diversity of the genus, including the range of virulence and pathogenicity mechanisms, is most likely the result of interspecies interactions, a massive horizontal gene transfer between streptococci within a shared oral niche, recombination events, selection of specialized clones, and modification of regulatory circuits. Selective pressure by the host and bacterial communities is a driving force for the selection of virulence traits and shaping the streptococcal genome. Global regulatory events driving niche adaptation and interactions with bacterial communities and the host steer research interests towards attempts to define the oral interactome on the transcriptional level and define signal cross-feeding and co-expression and co-regulation of virulence genes.

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