Search results
Results from the WOW.Com Content Network
Structure of the classical cephalosporins. The cephalosporins (sg. / ˌ s ɛ f ə l ə ˈ s p ɔːr ɪ n, ˌ k ɛ-,-l oʊ-/ [1] [2]) are a class of β-lactam antibiotics originally derived from the fungus Acremonium, which was previously known as Cephalosporium. [3] Together with cephamycins, they constitute a subgroup of β-lactam antibiotics ...
The cephalosporins (and other β-lactams) have the ability to kill bacteria by inhibiting essential steps in the bacterial cell wall synthesis which in the end results in osmotic lysis and death of the bacterial cell. [2] Cephalosporins are widely used antibiotics because of their clinical efficiency and desirable safety profile. [3]
In the context of medical pharmacology, penicillins, cephalosporins, and carbapenems, while all have the β-lactam ring that serves as the fundamental structure, also have an auxiliary ring that carries a carboxylate group that is positioned on the same side as the carbonyl group within the β-lactam ring, and, as such, this structural ...
Cephems are a sub-group of β-lactam antibiotics including cephalosporins and cephamycins. [1] It is one of the most common 4-membered ring heterocycle. [ 2 ] Produced by actinomycetes, cephamycins were found to display antibacterial activity against a wide range of bacteria, including those resistant to penicillin and cephalosporins. [ 3 ]
The β-lactam ring is part of the core structure of several antibiotic families, the principal ones being the penicillins, cephalosporins, carbapenems, and monobactams, which are, therefore, also called β-lactam antibiotics. Nearly all of these antibiotics work by inhibiting bacterial cell wall biosynthesis.
Amongst 3rd-generation oral cephalosporins, the spectrum of cefditoren is particularly balanced, includes both Gram-positive and Gram-negative species. The experts expressed the opinion that, due to its high intrinsic activity, cefditoren appears as an appropriate agent for either the treatment of lower respiratory tract infections and for ...
It could also be possible that a reactive intermediate is formed due to the unstable β-lactam ring. [9] The pyridinium side-group of cephaloridine has unstable bonds to the core of the compound (in comparison with other cephalosporins). When this side-group leaves, the β-lactam ring is destabilized by intramolecular electron shifts. [13]
Cephalosporin C is an antibiotic of the cephalosporin class. It was isolated from a fungus of the genus Acremonium and first characterized in 1961. [ 1 ] Although not a very active antibiotic itself, synthetic analogs of cephalosporin C, such as cefalotin , became some of the first marketed cephalosporin antibiotic drugs.