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Cefoperazone (T-1551), a new semisynthetic cephalosporin: comparison with cephalothin and gentamicin
Abstract:
The in vitro activity of cefoperazone (T-1551) against almost 9,000 recent clinical isolates at six institutions was tested and compared with that of cephalothin and gentamicin. The modal minimum inhibitory concentrations of cefoperazone were 16- and 4-fold less than those of cephalothin and gentamicin, respectively, against 5,503 strains of Enterobacteriaceae. Species normally resistant to cephalothin, such as indole-positive protease and enterobacters, were almost universally susceptible to cefoperazone. Cefoperazone demonstrated activity comparable to gentamicin against Pseudomonas aeruginosa and other pseudomonads.
Insights
Cefoperazone shows strong in vitro antibacterial activity, outperforming cephalothin and matching gentamicin against key pathogens. This new antibiotic is effective against resistant bacterial strains, offering a promising therapeutic option.
Area of Science:
- Microbiology
- Pharmacology
- Infectious Diseases
Background:
- Emerging antibiotic resistance necessitates novel therapeutic agents.
- Understanding the in vitro efficacy of new antibiotics is crucial for clinical application.
Purpose of the Study:
- To evaluate the in vitro antibacterial activity of cefoperazone (T-1551).
- To compare cefoperazone's efficacy against cephalothin and gentamicin using recent clinical isolates.
Main Methods:
- Testing cefoperazone against nearly 9,000 clinical bacterial isolates from six institutions.
- Determining modal minimum inhibitory concentrations (MICs) for comparative analysis.
Main Results:
- Cefoperazone exhibited significantly lower MICs than cephalothin and gentamicin against Enterobacteriaceae.
- Bacterial species resistant to cephalothin, including indole-positive Proteus and Enterobacter, were susceptible to cefoperazone.
- Cefoperazone demonstrated comparable activity to gentamicin against Pseudomonas aeruginosa.
Conclusions:
- Cefoperazone possesses potent in vitro activity against a broad spectrum of clinical isolates.
- Cefoperazone is effective against bacteria resistant to other cephalosporins.
- Cefoperazone represents a promising new antibiotic for treating infections caused by susceptible Gram-negative bacteria.