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Download PDF by Ola Skold(auth.): Antibiotics and Antibiotic Resistance

By Ola Skold(auth.)

ISBN-10: 0470438509

ISBN-13: 9780470438503

ISBN-10: 1118075609

ISBN-13: 9781118075609

This e-book, that's the translated model of a Swedish e-book, combines a normal advent of a number of antibiotics with a closer dialogue of resistance. the focal point on resistance in studying approximately antibiotics may help destiny scientists realize the matter antibiotics resistance poses for medicinal and drug-related fields, and maybe set off extra examine and discoveries to struggle antibiotic resistant traces.

present overviews of the subject are integrated, besides particular discussions at the person mechanisms (betalactams, glycopeptides, aminoglycosides, and so on) utilized in a variety of antibacterial brokers and reasons of ways resistances to these improve. tools for counteracting resistance improvement in micro organism are mentioned as well.

Content:
Chapter 1 Antibiotics: the best Triumph of clinical drugs (pages 1–19):
Chapter 2 Distribution of Antibiotics (pages 21–28):
Chapter three Sulfonamides and Trimethoprim (pages 29–68):
Chapter four Penicillins and different Betalactams (pages 69–94):
Chapter five Glycopeptides (pages 95–102):
Chapter 6 Aminoglycosides (pages 103–113):
Chapter 7 different Antibiotics Interfering with Bacterial Protein Synthesis (pages 115–131):
Chapter eight Quinolones (pages 133–145):
Chapter nine Antibacterial brokers no longer with regards to the big Antibiotic households (pages 147–166):
Chapter 10 Mechanisms for the Horizontal unfold of Antibiotic Resistance between micro organism (pages 167–186):
Chapter eleven find out how to deal with Antibiotic Resistance (pages 187–202):

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Additional resources for Antibiotics and Antibiotic Resistance

Example text

Despite the fact that sulfonamides have not long been used for the treatment of streptococcal infections, sulfonamide resistance is common among present isolates of S. pyogenes. This is a further interesting illustration of the nonreversibility of resistance in the absence of the selecting effect of the drug. The drug-resistant phenotypes do not seem to be at any disadvantage in competition with their drug-susceptible relatives. Sulfonamide-resistant strains of S. pyogenes were shown to have very high resistance, some of them with MIC values of 1 mg/mL.

These three genes differ among themselves (40% similarity at the amino acid level). Their origins are not known. The occurrence of these three plasmid-borne genes is the most common form of sulfonamide resistance among clinically isolated enterobacteria. Remarkably, only sul1 and sul2 or both were long found in isolates of sulfonamide-resistant enterobacteria from various parts of the world. This is in contrast to trimethoprim resistance, described later in the chapter, at which more than 20 different plasmidborne resistance genes have been found and characterized.

Meningitidis Next we look in detail at the differences in amino acid sequence between dihydropteroate synthase from sulfonamidesusceptible meningococci and the corresponding resistant meningococci. We describe the mechanism as completely as possible and as a general example of resistance evolution in bacteria. A comparison of the amino acid sequences between susceptible and resistant enzymes, respectively, showed about 20 specific differences. Three of these affected amino acids, which have been identified in the same position in all known bacterial dihydropteroate synthases, indicating their role in the basic function of the enzyme (Fig.

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Antibiotics and Antibiotic Resistance by Ola Skold(auth.)


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