New technique to take samples from environmental surfaces using flocked nylon swabs.

Area of Science:

• Microbiology
• Hospital Infection Control
• Environmental Hygiene

Background:

• Hospital environmental surfaces are frequently contaminated with pathogenic micro-organisms.
• Standardized methods for quantitative surface sampling are lacking, impacting infection control accuracy.
• Traditional swabs (cotton, rayon) show poor recovery rates for micro-organisms.

Purpose of the Study:

• To evaluate a novel surface sampling technique using flocked nylon swabs.
• To compare the efficiency and recovery rates of flocked nylon swabs against traditional methods.
• To validate a new sequential sampling technique for enhanced micro-organism recovery.

Main Methods:

• Reference strains of Staphylococcus aureus and Enterococcus hirae were used.
• Micro-organisms were inoculated onto a bedside table surface and allowed to dry.
• Sequential samples were collected from the same surface using two flocked nylon swabs.
• Efficiency, percentage recovery, and culture result variation were analyzed.

Main Results:

• The novel flocked nylon swab technique demonstrated enhanced sampling efficiency.
• Higher recovery rates of inoculated micro-organisms were achieved compared to traditional methods.
• The use of two sequential flocked nylon swabs improved overall inoculum recovery.

Conclusions:

• Sequential sampling with flocked nylon swabs offers a superior method for quantitative surface cultures.
• This improved technique can enhance the detection of micro-organisms on hospital surfaces.
• The findings support the adoption of this method for better hospital environmental monitoring and infection prevention.