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      Why Is Long-Term Therapy Required to Cure Tuberculosis?

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      PLoS Medicine
      Public Library of Science

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          Abstract

          The authors argue that understanding and countering general bacterial mechanisms of phenotypic antibiotic resistance may hold the key to reducing the duration of treatment of all recalcitrant bacterial infections, including tuberculosis.

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          Most cited references82

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          Bacterial persistence as a phenotypic switch.

          A fraction of a genetically homogeneous microbial population may survive exposure to stress such as antibiotic treatment. Unlike resistant mutants, cells regrown from such persistent bacteria remain sensitive to the antibiotic. We investigated the persistence of single cells of Escherichia coli with the use of microfluidic devices. Persistence was linked to preexisting heterogeneity in bacterial populations because phenotypic switching occurred between normally growing cells and persister cells having reduced growth rates. Quantitative measurements led to a simple mathematical description of the persistence switch. Inherent heterogeneity of bacterial populations may be important in adaptation to fluctuating environments and in the persistence of bacterial infections.
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            Persister cells, dormancy and infectious disease.

            Kim Lewis (2007)
            Several well-recognized puzzles in microbiology have remained unsolved for decades. These include latent bacterial infections, unculturable microorganisms, persister cells and biofilm multidrug tolerance. Accumulating evidence suggests that these seemingly disparate phenomena result from the ability of bacteria to enter into a dormant (non-dividing) state. The molecular mechanisms that underlie the formation of dormant persister cells are now being unravelled and are the focus of this Review.
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              TREATMENT OF STAPHYLOCOCCAL INFECTIONS WITH PENICILLIN BY INTERMITTENT STERILISATION

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                Author and article information

                Journal
                PLoS Med
                pmed
                PLoS Medicine
                Public Library of Science (San Francisco, USA )
                1549-1277
                1549-1676
                March 2007
                20 March 2007
                : 4
                : 3
                : e120
                Author notes
                * To whom correspondence should be addressed. E-mail: lalitar@ 123456u.washington.edu
                Article
                06-PLME-RIT-0481R2
                10.1371/journal.pmed.0040120
                1831743
                17388672
                c8e90630-b1de-4c42-b7ca-6c27ff75db8b
                © 2007 Connolly et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
                History
                Page count
                Pages: 8
                Categories
                Research in Translation
                Infectious Diseases
                Infectious Diseases
                Infectious Diseases
                Infectious Diseases
                Microbiology
                Microbiology
                Microbiology
                Microbiology
                Pharmacology
                Pharmacology
                Pharmacology
                Public Health and Epidemiology
                Tuberculosis
                Infectious Diseases
                Microbiology
                Pharmacology and Toxicology
                Drugs and Adverse Drug Reactions
                Custom metadata
                Connolly LE, Edelstein PH, Ramakrishnan L (2007) Why is long-term therapy required to cure tuberculosis? PLoS Med 4(3): e120. doi: 10.1371/journal.pmed.0040120

                Medicine
                Medicine

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