Antimicrobial activity of cefotaxime tested against infrequently isolated pathogenic species (unusual pathogens)

Area of Science:

• Clinical Microbiology
• Infectious Diseases
• Antimicrobial Susceptibility Testing

Background:

• Cefotaxime sodium is a broad-spectrum cephalosporin antibiotic.
• Its activity against less common pathogens requires detailed investigation.

Purpose of the Study:

• To compile and analyze data on cefotaxime sodium's activity against less frequently isolated pathogens.
• To provide guidance for treating unusual infections caused by fastidious bacteria.

Main Methods:

• Literature review of 44 references.
• Analysis of the University of Iowa Hospitals and Clinics clinical microbiology database.
• Data collection on cefotaxime sodium's minimum inhibitory concentrations (MICs) against various bacterial species.

Main Results:

• Cefotaxime sodium demonstrated consistent activity against Actinobacillus actinomycetemcomitans, Capnocytophaga spp., Eikenella corrodens, Erysipelothrix rhusiopathiae, Pasteurella multocida, Plesiomonas shigelloides, and Fusobacterium nucleatum.
• Uniform resistance to cefotaxime was observed in Alcaligenes xylosoxidans, Flavobacterium spp., Stenotrophomonas (Xanthomonas) maltophilia, Bacillus cereus, Listeria monocytogenes, and Rhodococcus equi.
• Significant variation in MICs was noted for many other species.

Conclusions:

• Cefotaxime sodium is effective against a range of clinically relevant bacteria, including some less common pathogens.
• Knowledge of cefotaxime's activity profile is crucial for empirical therapy, especially when rapid susceptibility testing is unavailable.
• The data supports informed clinical decision-making for treating infections caused by difficult-to-culture or unusual microorganisms.