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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 ...
β-Lactam antibiotics are indicated for the prevention and treatment of bacterial infections caused by susceptible organisms. At first, β-lactam antibiotics were mainly active only against gram-positive bacteria, yet the recent development of broad-spectrum β-lactam antibiotics active against various gram-negative organisms has increased their usefulness.
Tazobactam is a pharmaceutical drug that inhibits the action of bacterial β-lactamases, especially those belonging to the SHV-1 and TEM groups. It is commonly used as its sodium salt, tazobactam sodium.
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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]
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.
The basic structure of 3rd generation cephalosporins. The majority of third generation cephalosporins have the aminothiazole group at position C-7. Different groups are found at the 7-α-position like 7-α-iminohydroxy and 7-α-iminomethoxy groups. Ceftibuten however possesses a 7-α-ethylidene group. This group gives ceftibuten higher ...
Cefiderocol may cause serious and life-threatening allergic reactions, severe diarrhea caused by C. difficile and seizures. [9]An increased rate of mortality was observed in people treated with cefiderocol as compared to other antibiotics in a separate clinical trial in critically ill people with multidrug-resistant Gram-negative bacterial infections.