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Ceftolozane contains a 7-aminothiadiazole, affording increased activity against gram-negative organisms, as well as an alkoximino group, providing stability against many β-lactamases. Ceftolozane has a dimethylacetic acid moiety that contributes to enhanced activity against Pseudomonas aeruginosa. The addition of a bulky side chain (a pyrazole ...
Gram-negative: Third-generation cephalosporins have a broad spectrum of activity and further increased activity against gram-negative organisms. They may be particularly useful in treating hospital-acquired infections , although increasing levels of extended-spectrum beta-lactamases are reducing the clinical utility of this class of antibiotics.
ATC code J01 Antibacterials for systemic use is a therapeutic subgroup of the Anatomical Therapeutic Chemical Classification System, a system of alphanumeric codes developed by the World Health Organization (WHO) for the classification of drugs and other medical products.
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The main classes of β-lactam antibiotics used to treat gram-negative bacterial infections include (in approximate order of intrinsic resistance to cleavage by β-lactamases) penicillins (especially aminopenicillins and ureidopenicillins), 3rd generation cephalosporins, and carbapenems.
It retains some activity of later-generation cephalosporins having broad-spectrum activity against Gram-negative bacteria, but its effectiveness is relatively much weaker. [4] [5] It is currently being investigated for community-acquired pneumonia [6] and complicated skin and skin structure infection. [7] [8] [9]
The basic structure of first generation cephalosporins. First generation cephalosporins were the first cephalosporins on the market. They have good antimicrobial activity against gram-positive bacteria but limited activity against gram-negative species. [25] The chemical structures of the first generation cephalosporins are fairly simple.
Ceftazidime, sold under the brand name Fortaz among others, is a third-generation cephalosporin antibiotic useful for the treatment of a number of bacterial infections. [1] [5] Specifically it is used for joint infections, meningitis, pneumonia, sepsis, urinary tract infections, malignant otitis externa, Pseudomonas aeruginosa infection, and vibrio infection. [1]
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