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Aminoglycoside antibiotics display bactericidal activity against Gram-negative aerobes and some anaerobic bacilli where resistance has not yet arisen but generally not against Gram-positive and anaerobic Gram-negative bacteria. [3] Streptomycin is the first-in-class aminoglycoside antibiotic.
Macrolides, [8] clindamycin [12] and aminoglycosides [7] (with all these three having other potential mechanisms of action as well), have evidence of inhibition of ribosomal translocation. Fusidic acid prevents the turnover of elongation factor G from the ribosome.
The aminopenicillins are a group of antibiotics in the penicillin family that are structural analogs of ampicillin (which is the 2-amino derivative of benzylpenicillin, hence the name). [1] Like other penicillins and beta-lactam antibiotics , they contain a beta-lactam ring that is crucial to its antibacterial activity.
Streptothricins are a group of antibiotics in the aminoglycoside class. [1] The first antibiotic in the group was isolated from Streptomyces lavendulae in 1942. [ 2 ] It was later determined to be a mixture of closely-related compounds, and is now known as nourseothricin .
Narrow-spectrum antibiotics have low propensity to induce bacterial resistance and are less likely to disrupt the microbiome (normal microflora). [3] On the other hand, indiscriminate use of broad-spectrum antibiotics may not only induce the development of bacterial resistance and promote the emergency of multidrug-resistant organisms, but also cause off-target effects due to dysbiosis.
Side-effects of amikacin are similar to those of other aminoglycosides. Kidney damage and ototoxicity (which can lead to hearing loss) are the most important effects, occurring in 1–10% of users. [17] The nephro- and ototoxicity are thought to be due to aminoglycosides' tendency to accumulate in the kidneys and inner ear. [8] Diagram of the ...
This section will review the drug development from one generation to the next with emphasis on the structural differences between the generations. The generation classification system relies on dividing the cephalosporins by their chemical properties and their relative activity against gram-negative versus gram-positive bacteria.
Tetracyclines are generally used in the treatment of infections of the urinary tract, respiratory tract, and the intestines and are also used in the treatment of chlamydia, especially in patients allergic to β-lactams and macrolides; however, their use for these indications is less popular than it once was due to widespread development of resistance in the causative organisms.