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In vitro activity of cefodizime.
Infection
|January 1, 1992
Summary
Cefodizime, a broad-spectrum cephalosporin antibiotic, demonstrates potent bactericidal activity against many Gram-positive and Gram-negative bacteria. It remains effective against beta-lactamase producing strains, showing promising therapeutic potential.
Area of Science:
- Microbiology
- Pharmacology
- Antibiotic Resistance
Background:
- Cefodizime is a third-generation cephalosporin antibiotic.
- It exhibits broad-spectrum antibacterial activity against Gram-positive and Gram-negative pathogens.
- Understanding its efficacy and resistance mechanisms is crucial for clinical application.
Purpose of the Study:
- To characterize the antibacterial spectrum and potency of Cefodizime.
- To evaluate its activity against beta-lactamase producing bacteria.
- To investigate its binding affinity to penicillin-binding proteins (PBPs).
Main Methods:
- Minimum Inhibitory Concentration (MIC90) determination for various bacterial species.
- Assessment of activity against beta-lactamase producing strains.
- Evaluation of Cefodizime's affinity for specific PBPs in Escherichia coli and Staphylococcus aureus.
Main Results:
- Cefodizime shows low MIC90 values for Streptococcus spp., Haemophilus spp., Neisseria spp., and Moraxella catarrhalis.
- Activity is maintained against beta-lactamase positive M. catarrhalis.
- Effective against many Enterobacteriaceae but less so against Pseudomonas spp. and Acinetobacter spp.
- Unaffected by plasmid-mediated beta-lactamases but susceptible to some chromosomal enzymes.
- High affinity for PBP 3, PBP IA, IB in E. coli and PBP 1 in S. aureus.
Conclusions:
- Cefodizime is a potent bactericidal antibiotic with broad-spectrum activity.
- It exhibits favorable activity against common respiratory and genitourinary pathogens.
- Its mechanism involves high affinity binding to essential bacterial PBPs, contributing to its efficacy.