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Mechanisms of antibiotic resistance

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889195268 Year: Pages: 224 DOI: 10.3389/978-2-88919-526-8 Language: English
Publisher: Frontiers Media SA
Subject: Microbiology --- Science (General)
Added to DOAB on : 2015-12-10 11:59:06
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Antibiotics represent one of the most successful forms of therapy in medicine. But the efficiency of antibiotics is compromised by the growing number of antibiotic-resistant pathogens. Antibiotic resistance, which is implicated in elevated morbidity and mortality rates as well as in the increased treatment costs, is considered to be one of the major global public health threats (www.who.int/drugresistance/en/) and the magnitude of the problem recently prompted a number of international and national bodies to take actions to protect the public (http://ec.europa.eu/dgs/health_consumer/docs/road-map-amr_en.pdf: http://www.who.int/drugresistance/amr_global_action_plan/en/; http://www.whitehouse.gov/sites/default/files/docs/carb_national_strategy.pdf). Understanding the mechanisms by which bacteria successfully defend themselves against the antibiotic assault represent the main theme of this eBook published as a Research Topic in Frontiers in Microbiology, section of Antimicrobials, Resistance, and Chemotherapy. The articles in the eBook update the reader on various aspects and mechanisms of antibiotic resistance. A better understanding of these mechanisms should facilitate the development of means to potentiate the efficacy and increase the lifespan of antibiotics while minimizing the emergence of antibiotic resistance among pathogens.

Role and prevalence of antibiosis and the related resistance genes in the environment

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889195213 Year: Pages: 126 DOI: 10.3389/978-2-88919-521-3 Language: English
Publisher: Frontiers Media SA
Subject: Microbiology --- Science (General)
Added to DOAB on : 2015-12-10 11:59:06
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It becomes increasingly clear that the basis of antibiotic resistance problem among bacterial pathogens is not confined to the borders of clinical microbiology but has broader ecological and evolutionary associations. This Research Topic “Role and prevalence of antibiosis and the related resistance genes in the environment” in Frontiers in Microbiology, section Antimicrobials, Resistance and Chemotherapy, presents the examples of occurrence and diversity of antibiotic resistance genes in the wide range of environments, from the grasslands of the Colombian Andes, to the dairy farms and small animal veterinary hospitals in the United Stated, and to the various environments of Continental Europe and Indochina. Besides, various genetic mechanisms and selection/co-selection factors contributing to the dissemination and maintenance of antibiotic resistance genes are presented. The topic is finalized by the mathematical modeling approach to access the probability of rare horizontal gene transfer events in bacterial populations.

Biofilm-Based Nosocomial Infections

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ISBN: 9783038421351 9783038421368 Year: Pages: 238 DOI: 10.3390/books978-3-03842-136-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Added to DOAB on : 2016-05-12 12:14:31
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Microbial biofilms have been implicated in a large number of acute and chronic infections, as well as in the failure of antibiotic treatment, particularly in hospitalized patients. In fact, the well-known persistence in the nosocomial environment of multidrug resistant microorganisms is believed to be highly promoted by the ability of the great majority of the involved bacterial and fungal species to adhere on living or abiotic surfaces, and to grow in sessile mode, to form single- or multi-species biofilms. In these communities, microbes grow encased in a hydrated matrix of extracellular polymeric substances produced by themselves and are well protected from the host immune response and the attack of antimicrobial molecules. Thus, the establishment of microbial biofilm communities on the mucosal and soft tissues of hospitalized patients, as well as on the surfaces of indwelling devices and medical instruments, is expected to have a great influence on the success of the antibiotic therapies against most of the bugs involved in nosocomial infections, being biofilm-growing bacteria and fungi much less susceptible to antibiotics.

Antibiotics and Urinary Tract Infections

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ISBN: 9783906980799 9783906980805 Year: Pages: X, 143 DOI: 10.3390/books978-3-906980-80-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Added to DOAB on : 2015-10-22 08:27:21
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Urinary tract infections (UTI) are one of the most frequently occurring infections, not only community acquired, but also hospital acquired infections. An increase of resistant uropathogens against commonly used antibiotics can be observed worldwide, a subject of great concern.Several strategies are discussed how to cope with this problem:i) not to use antibiotics, when not indicated, e.g. asymptomatic bacteriuria, or when non-antimicrobial measures are available, e.g. for prophylaxis of recurrent UTI;ii) to prefer even old antibiotics, which still have preserved their antibacterial activity against uropathogens;iii) if broad spectrum antibiotics are needed for empiric therapy of severe infections, to use the right and high enough dosages to reduce selection of resistant pathogens, and to step down to a more tailored antibiotic therapy as soon as possible;iv) to control and try to avoid health care associated UTI by optimal hygienic and interventional strategies; and last but not leastv) to stimulate development of new antibiotics, especially when new bacterial targets can be approached

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