Pediatric Blood Cultures and Antibiotic Resistance: An Overview

Area of Science:

• Medical Microbiology
• Infectious Diseases
• Public Health

Background:

• Bloodstream infections (BSI) in pediatric intensive care units (PICU) are a growing global concern due to multidrug-resistant organisms (MDROs).
• High mortality associated with BSI necessitates prompt and appropriate antibiotic therapy.
• Surveillance of causative agents and antimicrobial resistance (AMR) patterns is vital for effective antibiotic policies.

Purpose of the Study:

• To review the etiology and antimicrobial susceptibility patterns of community-acquired BSI.
• To highlight the emerging trends of AMR in pediatric BSI, with a focus on PICU settings.
• To emphasize the urgent need for antimicrobial stewardship programs.

Main Methods:

• Literature review focusing on etiology and antibiograms of BSI in pediatric populations.
• Analysis of data on common bacterial and fungal isolates and their resistance profiles.
• Examination of resistance trends to various antibiotic classes, including carbapenems.

Main Results:

• Salmonella species (S. typhi, S. paratyphi A) are major causes of community-acquired BSI, with over 90% quinolone resistance in India; ceftriaxone remains effective.
• Non-albicans Candida species are emerging causes of candidemia in PICUs.
• Gram-negative bacteria (Klebseilla pneumoniae) and Gram-positive cocci (S. aureus) are significant pathogens in PICU-acquired BSI.
• High prevalence of resistance to ampicillin, cefotaxime, piperacillin-tazobactam, and levofloxacin is observed.
• Carbapenem resistance, often due to blaNDM, is prevalent in K. pneumoniae and A. baumannii, ranging from 1% to 79%.

Conclusions:

• Significant AMR challenges exist in pediatric BSI, demanding immediate attention.
• Antimicrobial stewardship programs are essential to preserve the efficacy of existing antibiotics.
• Effective management requires continuous surveillance and adaptation of treatment guidelines.