Antimicrobial susceptibility testing in the office laboratory.

Area of Science:

• Microbiology
• Clinical Diagnostics
• Pediatric Infectious Diseases

Background:

• Antimicrobial susceptibility testing (AST) is crucial for guiding effective treatment of bacterial infections.
• Empiric oral antimicrobial therapy is often sufficient for common, non-systemic pediatric infections treated outpatient.
• Accurate AST is complex, requiring specialized expertise and robust quality control systems.

Observation:

• Common pediatric pathogens like Haemophilus influenzae and Streptococcus pneumoniae necessitate advanced methods for reliable susceptibility testing.
• Direct susceptibility testing of urine specimens can be reliably performed in most standard office laboratories.
• Many AST procedures are not practical or reliable for typical office-based laboratory settings.

Findings:

• Direct urine specimen susceptibility testing is the most practical and reliable antimicrobial test for office laboratories.
• Testing common pediatric pathogens requires specialized expertise and complex laboratory systems beyond routine office capabilities.
• Reference laboratories with stringent quality control are essential for accurate AST beyond direct urine testing.

Implications:

• Office laboratories can reliably perform direct urine susceptibility testing, aiding prompt clinical decisions for urinary tract infections.
• The complexity of AST for other common pediatric pathogens highlights the need for accessible and reliable reference laboratory services.
• Ensuring access to quality-controlled reference laboratories is critical for optimizing antimicrobial therapy and managing pediatric bacterial infections effectively.