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Published on: October 4, 2024
Ceftaroline activity on certain respiratory tract and wound infection agents at the minimum inhibitory concentration
Keramettin Yanik1, Emin Guluzade, Kemal Bilgin
1Ondokuz Mayis University, Samsun, Turkey. keramettinyanik@omu.edu.tr.
Introduction:
The aim of this study was to investigate the effectiveness of ceftaroline against agents frequently isolated from respiratory tract and wound infections.
Methodology:
The study included a total of 250 strains isolated from various clinical specimens, among which were Streptococcus pyogenes, Streptococcus agalactiae, Streptococcus dysagalactiae, Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catharralis. The bacteria were identified using the matrix-assisted laser desorption/ionization time-of-flight method and conventional methods. The bacteria's antibiotic susceptibility was tested using appropriate broth microdilution. Mueller-Hinton broth with 4% lysed horse blood, Haemophilus test medium broth, and Mueller-Hinton broth were used. Ceftaroline fosamil results at the minimum inhibitory concentration (MIC) were evaluated using Clinical and Laboratory Standards Institute (CLSI) criteria. For quality assurance, E. coli ATCC 35218, S. aureus ATCC 29213, S. aureus ATCC 43300, S. pneumoniae ATCC 49619, H. influenzae ATCC 49766, H. influenzae ATCC 10211, and H. influenzae ATCC 49247 standard strains were used.
Results:
According to CLSI criteria, resistance was not detected in any strains. Due to the absence of CLSI criteria for M. catharralis, the susceptibility state for this bacterium was not evaluated. The various strains' MIC50-MIC90 values were as follows: for S. pyogenes, 0.015-0.06; for S. agalactiae, 0.03-0.125; for S. dysagalactiae, 0.03-0.06; for S. pneumoniae, 0.06-0.125; for H. influenzae, 0.015-0.125; and for M. catharralis, 0.5-1.
Conclusions:
The results indicate that ceftaroline is quite effective against bacteria that are frequently isolated from respiratory tract and wound infections.
Insights
Ceftaroline demonstrates high effectiveness against common respiratory and wound infection bacteria. This study found no resistance in tested strains, supporting its potential clinical use.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Pharmacology
Background:
- Respiratory tract and wound infections pose significant clinical challenges.
- Identifying effective antimicrobial agents is crucial for patient outcomes.
- Ceftaroline is a cephalosporin antibiotic with broad-spectrum activity.
Purpose of the Study:
- To evaluate the in vitro efficacy of ceftaroline.
- To assess ceftaroline's activity against key bacterial pathogens.
- To determine ceftaroline's minimum inhibitory concentrations (MICs) for relevant clinical isolates.
Main Methods:
- Antibiotic susceptibility testing of 250 clinical isolates.
- Bacterial identification using MALDI-TOF and conventional methods.
- Broth microdilution method to determine MIC values for ceftaroline fosamil.
Main Results:
- No ceftaroline resistance was observed in Streptococcus pyogenes, Streptococcus agalactiae, Streptococcus dysagalactiae, Streptococcus pneumoniae, and Haemophilus influenzae.
- MIC50-MIC90 values indicated high potency against these Gram-positive and Gram-negative bacteria.
- Susceptibility for Moraxella catharralis was not evaluated due to lack of established criteria.
Conclusions:
- Ceftaroline exhibits significant in vitro activity.
- The antibiotic is effective against common pathogens causing respiratory and wound infections.
- These findings support ceftaroline's role in treating relevant infections.
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