The dynamics of methicillin-resistant Staphylococcus aureusexposure in a hospital model and the potential for environmental intervention

Table 2 Intervention effectiveness when total surface area cleaned per day is varied

Cleaning frequency	No	Surface decontamination			Surface wiping
Cleaning frequency	Intervention	A. Every 24 h	B. Every 12 h	C. Every 8 h	D. HCW swipe 8 times/h	E. HCW swipe 3 times/h*
Total surface area cleaned/day (cm²)		8000	16000	24000	57600	24000
Types of surfaces		Both	Both	Both	Nonporous	Nonporous
Number of cleaning events/day		1	2	3	192	80
Surface area cleaned each implementation		2000	2000	2000	150	150
Average MRSA concentration on the uncolonized patient	2065.55	1454.76	1055.09	776.87	703.89	1111.86
Percent reduction of exposure to the uncolonized patient	n/a	29.57%	48.92%	62.38%	65.92%	46.17%

*HCWs touch the nonporous surface 8 times an hour and wipe only 3 times an hour.

ISSN: 1471-2334