from Villamaria et al. 2015
published in Infect Control Hosp Epidemiol 36(12):1472-5
DOI 10.1017/ice.2015.207

Comparison of Environmental MRSA Levels on High-Touch Surfaces in Contact Isolation and Noncontact Isolation Patient Rooms

MRSA identified on surfaces in rooms with patients without MRSA colonisation emphasise the importance of disinfecting the hands before and after touching a patient and her/his surroundings

This study compared the MRSA contamination on five high-touch surfaces in contact isolation and normal patient rooms. Samples from five high-touch surfaces (call system buttons, bedframes, deposit tables, handrails in bathrooms, toilet seats) in 100 isolation and normal patient rooms, which had been occupied for at least 48 hours before sampling, were collected. A total of 1,830 colonies of multi-resistant S. aureus were identified in the samples taken in the isolation rooms. The number of MRSA colonies in the samples taken in normal patient rooms was 202. This corresponds to an average of 5.4 colonies per isolation room and 1.3 colonies per normal patient room. The difference was significant. The highest average MRSA concentration was found on call system buttons and toilet seats in both isolation rooms (buttons: 7.3 ± 27.3 colonies / toilet seats: 6.2 ± 28.6 colonies) and normal patient rooms (button: 2.6 ± 7.8 colonies / toilet seats: 2.9 ± 15.9 colonies). The difference between the two different types of patient rooms was not significant here. The samples taken from handrails in bathrooms and bedframes in normal patient rooms contained significantly less MRSA colonies (handrail: 0.3 ± 1.6 colonies / bedframe: 0.2 ± 0.9 colonies) than the ones taken in the isolation rooms (handrail: 2.9 ± 13.1 colonies / bedframe: 8.5 ± 36.0 colonies).