Figure 2

REP-PCR profiles and similarity matrix of the environmental sub clones. 1 = strain cultured from the ventilator of bed no.1; 2, 6, 11 = strain cultured from the floor near the patient beds no.1, 3,4 3, 9 = strain cultured from the desk surfaces of beds no.4 and 7; 4 = strain cultured from buttons on the ventilator of bed no.3; 5, 12 = strain cultured from ventilator keyboard of bed no.3 and 6; 7 = strain cultured from edge side of bed no.8; 8 = strain cultured from drawers of the bedside table near bed no.5; 10 = strain cultured from service desk near bed no.1; 13 = strain cultured from the floor at the entrance of ICU; 14 = strain cultured from folder of medical record of patient in the bed no.1. 15 = strain cultured from monitor keyboard of bed no.3.