Fig. 1.

Estimated prevalence of Pseudomonas aeruginosa (a), gentamicin-resistant Klebsiella pneumoniae (b), amikacin-resistant Acinetobacter spp. (c), methicillin-resistant Staphylococcus aureus (d), extended spectrum beta-lactamase-producing Enterobacteriaceae (excl. K. pneumoniae) (e) on tetanus intensive care unit during year 1 (May 2004–April 2005) and year 2 (May 2005–April 2006). Red indicates the number of patients colonized at a given time point, green the number of patients uncolonized, and blue the number of patients with unknown colonization status, i.e., patient days between the last negative culture result and the first positive culture result, or patient days between the last negative result and discharge