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• W2103277951 abstract "Listeria monocytogenes can cause the serious infection listeriosis, which despite antibiotic treatment has a high mortality. Understanding the response of L. monocytogenes to antibiotic exposure is therefore important to ensure treatment success. Some bacteria survive antibiotic treatment by formation of persisters, which are a dormant antibiotic-tolerant subpopulation. The purpose of this study was to determine whether L. monocytogenes can form persisters and how bacterial physiology affects the number of persisters in the population. A stationary-phase culture of L. monocytogenes was adjusted to 10(8) CFU ml(-1), and 10(3) to 10(4) CFU ml(-1) survived 72-h treatment with 100 μg of norfloxacin ml(-1), indicating a persister subpopulation. This survival was not caused by antibiotic resistance as regrown persisters were as sensitive to norfloxacin as the parental strain. Higher numbers of persisters (10(5) to 10(6)) were surviving when older stationary phase or surface-associated cells were treated with 100 μg of norfloxacin ml(-1). The number of persisters was similar when a ΔsigB mutant and the wild type were treated with norfloxacin, but the killing rate was higher in the ΔsigB mutant. Dormant norfloxacin persisters could be activated by the addition of fermentable carbohydrates and subsequently killed by gentamicin; however, a stable surviving subpopulation of 10(3) CFU ml(-1) remained. Nitrofurantoin that has a growth-independent mode of action was effective against both growing and dormant cells, suggesting that eradication of persisters is possible. Our study adds L. monocytogenes to the list of bacterial species capable of surviving bactericidal antibiotics in a dormant stage, and this persister phenomenon should be borne in mind when developing treatment regimens." @default.
• W2103277951 created "2016-06-24" @default.
• W2103277951 creator A5013422430 @default.
• W2103277951 creator A5025110471 @default.
• W2103277951 creator A5061787967 @default.
• W2103277951 date "2013-12-01" @default.
• W2103277951 modified "2023-10-17" @default.
• W2103277951 title "Survival of Bactericidal Antibiotic Treatment by a Persister Subpopulation of Listeria monocytogenes" @default.
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• W2103277951 doi "https://doi.org/10.1128/aem.02184-13" @default.
• W2103277951 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3837754" @default.
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