Prevalence of toxin producing strains of Staphylococcus aureus in a pediatric burns unit

Area of Science:

• Microbiology
• Environmental Health
• Pediatric Care

Background:

• Pediatric burns units are susceptible to bacterial contamination.
• Controlling Staphylococcus aureus (S. aureus) is crucial for patient safety.
• Understanding environmental reservoirs is key to infection prevention.

Purpose of the Study:

• To identify S. aureus contamination sites within a pediatric burns unit.
• To assess the role of environmental surfaces and air in S. aureus transmission.
• To characterize toxin production of S. aureus isolates.

Main Methods:

• Monthly environmental sampling (air, surfaces) over 6 months using agar plates.
• Contact plates for surfaces, air samplers, and settle plates for airborne S. aureus.
• Staff screening for S. aureus colonization over 3 months.
• Toxin analysis (enterotoxins A-D, toxic shock syndrome toxin-1) via latex agglutination.

Main Results:

• S. aureus was frequently recovered from all sampled surfaces, especially in high-traffic areas.
• Settle plates were more effective than air samplers for detecting airborne S. aureus.
• Enterotoxin C and toxic shock syndrome toxin-1 (TSST-1) were the dominant toxins produced.
• Staff showed transient colonization with S. aureus strains exhibiting different toxin profiles.

Conclusions:

• Environmental surfaces and air in pediatric burns units are significant reservoirs for S. aureus.
• Airborne transmission is a plausible route for S. aureus spread and environmental contamination.
• Effective infection control strategies must address both surface and airborne contamination.