Abstract
The past three decades have witnessed a disturbing increase in antimicrobial resistance. Bacterial isolates are emerging that are resistant to all currently available antimicrobial agents. Bacteria with this phenotype are designated multidrug-resistant (MDR) or “pan-drug” resistant (PDR) strains. What is the genetic basis of this remarkable survival skill? Are advantageous changes in the genome always random? Is antibiotic pressure the cause of growing resistance rates or does it merely serve as a trigger that selects the archived defense armamentarium within bacteria? In this review we will explore these concepts and discuss: (1) genetic diversity and mutations as its basis and (2) “hyper-mutators” and the mechanisms responsible for high mutation rates. Our review will conclude with examples of specific point mutations in bacterial enzymes that confer resistance to certain antibiotic classes.
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Acknowledgments
Research reported in this presentation was directly supported by the National Institute of Allergy and Infectious Diseases (NIAID) of the National Institutes of Health (NIH) under Award Numbers 5K08AI112506-02 (LKL), R01AI072219, R01AI063517, R01AI100560 (RAB), and by the Department of Veterans Affairs Research and Development under Award Number I01BX001974, VISN 10 Geriatrics Research, Education and Clinical Center (RAB).
The content is solely the responsibility of the authors and does not necessarily represent the official views of the Department of Veterans Affairs or the National Institutes of Health.
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Bonomo, R.A. (2017). Mutations as a Basis of Antimicrobial Resistance. In: Mayers, D., Sobel, J., Ouellette, M., Kaye, K., Marchaim, D. (eds) Antimicrobial Drug Resistance. Springer, Cham. https://doi.org/10.1007/978-3-319-46718-4_6
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DOI: https://doi.org/10.1007/978-3-319-46718-4_6
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