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Review
. 2016 Oct;29(4):819-36.
doi: 10.1128/CMR.00031-16.

Survival of the Fittest: How Bacterial Pathogens Utilize Bile To Enhance Infection

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Review

Survival of the Fittest: How Bacterial Pathogens Utilize Bile To Enhance Infection (V体育官网入口)

"VSports在线直播" Jeticia R Sistrunk et al. Clin Microbiol Rev. 2016 Oct.

"VSports" Abstract

Bacterial pathogens have coevolved with humans in order to efficiently infect, replicate within, and be transmitted to new hosts to ensure survival and a continual infection cycle. For enteric pathogens, the ability to adapt to numerous host factors under the harsh conditions of the gastrointestinal tract is critical for establishing infection. One such host factor readily encountered by enteric bacteria is bile, an innately antimicrobial detergent-like compound essential for digestion and nutrient absorption. Not only have enteric pathogens evolved to resist the bactericidal conditions of bile, but these bacteria also utilize bile as a signal to enhance virulence regulation for efficient infection VSports手机版. This review provides a comprehensive and up-to-date analysis of bile-related research with enteric pathogens. From common responses to the unique expression of specific virulence factors, each pathogen has overcome significant challenges to establish infection in the gastrointestinal tract. Utilization of bile as a signal to modulate virulence factor expression has led to important insights for our understanding of virulence mechanisms for many pathogens. Further research on enteric pathogens exposed to this in vivo signal will benefit therapeutic and vaccine development and ultimately enhance our success at combating such elite pathogens. .

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Figures

FIG 1
FIG 1
Infection sites of enteric pathogens in the gastrointestinal tract. Enteric bacterial pathogens have been shown to infect either the small intestine (represented with microvillus protrusions) (A) or the colon (B). In both settings, goblet cells produce mucus, stem cells initiate maturation of the enterocytes, and specialized microfold (M) cells serve as the point of antigen sampling that can be exploited by invasive pathogens to access epithelial cells. Paneth cells in the small intestine are important for initiating innate mucosal defenses. Infection mechanisms include adherence to or invasion of the epithelial cells lining the gastrointestinal tract, with Listeria, Vibrio, Salmonella, and some pathogenic Escherichia coli strains (EPEC and ETEC) infecting the small intestine and Campylobacter, EHEC, Shigella, and Clostridium infecting the colon.
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