Metallo-beta-lactamase Producing Pseudomonas aeruginosa in Neonatal Septicemia

Area of Science:

• Microbiology
• Infectious Diseases
• Neonatal Care

Background:

• Gram-negative bacilli are primary causes of neonatal sepsis.
• Many isolates exhibit multidrug resistance (MDR), particularly metallo-beta-lactamase (MβL) producers.
• Emerging antimicrobial resistance in neonatal infections necessitates ongoing surveillance.

Purpose of the Study:

• To determine the incidence of MβL-producing strains in multidrug-resistant Pseudomonas aeruginosa from neonatal sepsis cases.
• To assess the prevalence of MβL-producing P. aeruginosa in a neonatal intensive care unit setting.
• To highlight the threat of MβL-producing P. aeruginosa in neonatal septicemia.

Main Methods:

• Investigated 1994 neonatal sepsis cases between January and December 2006.
• Identified bacterial isolates and performed antimicrobial susceptibility testing.
• Screened imipenem-resistant P. aeruginosa for MβL production using the imipenem-EDTA disc method.

Main Results:

• Pseudomonas aeruginosa was the most frequent pathogen (48.2%) among 593 isolates.
• Metallo-beta-lactamase (MβL) production was detected in 69.5% of imipenem-resistant P. aeruginosa isolates.
• Gram-negative organisms predominated in the neonatal sepsis cases.

Conclusions:

• MβL-producing P. aeruginosa represents an emerging and significant threat in neonatal septicemia.
• High rates of MβL production in MDR P. aeruginosa are a major concern for clinicians.
• Effective antimicrobial strategies are crucial for managing these resistant infections in neonates.