Fig. 5
Bacterial load, in passive air samples, during mid mornings in the ultrasound room. Bacterial load reported as CFU/dm2/h in passive air samples from settle plates placed on the ultrasound machine and the computer table in an ultrasound room. During H2-H6 patients were present in the room. Number of settle plates on the ultrasound machine and the computer table are presented within brackets. The x marks the mean, and the line marks the median at each time slot (60 ± 10 min for all time slots but lunch break which varied between 35 and 60 min) and sampling locations