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• W2912690269 abstract "The antimicrobial triclosan is used in a wide range of consumer products ranging from toothpaste, cleansers, socks, and baby toys. A bacteriostatic inhibitor of fatty acid synthesis, triclosan is extremely stable and accumulates in the environment. Approximately 75% of adults in the United States have detectable levels of the compound in their urine, with a sizeable fraction of individuals (>10%) having urine concentrations equal to or greater than the minimal inhibitory concentration for Escherichia coli and methicillin-resistant Staphylococcus aureus (MRSA). Previous work has identified connections between defects in fatty acid synthesis and accumulation of the alarmone guanosine tetraphosphate (ppGpp), which has been repeatedly associated with antibiotic tolerance and persistence. Based on these data, we hypothesized that triclosan exposure may inadvertently drive bacteria into a state in which they are able to tolerate normally lethal concentrations of antibiotics. Here we report that clinically relevant concentrations of triclosan increased E. coli and MRSA tolerance to bactericidal antibiotics as much as 10,000-fold in vitro and reduced antibiotic efficacy up to 100-fold in a mouse urinary tract infection model. Genetic analysis indicated that triclosan-mediated antibiotic tolerance requires ppGpp synthesis but is independent of growth. These data highlight an unexpected and certainly unintended consequence of adding high concentrations of antimicrobials in consumer products, supporting an urgent need to reevaluate the costs and benefits of the prophylactic use of triclosan and other bacteriostatic compounds." @default.
• W2912690269 created "2019-02-21" @default.
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• W2912690269 date "2019-05-01" @default.
• W2912690269 modified "2023-10-18" @default.
• W2912690269 title "The Widely Used Antimicrobial Triclosan Induces High Levels of Antibiotic Tolerance <i>In Vitro</i> and Reduces Antibiotic Efficacy up to 100-Fold <i>In Vivo</i>" @default.
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• W2912690269 doi "https://doi.org/10.1128/aac.02312-18" @default.
• W2912690269 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6496070" @default.
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• W2912690269 hasPublicationYear "2019" @default.
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