FIG. 1.

Increasing prevalence of multidrug resistance among P. aeruginosa isolates from ICU patients in the United States. (A) Data for 13,999 nonduplicate isolates collected from 1993 to 2002 (178); (B) data for 37,390 isolates collected from 1997 to 2000 (132). Data represent the percentage of P. aeruginosa isolates that expressed a phenotype of multidrug resistance (resistance to three or more drug classes) during each year of the studies. (Panel A is adapted from reference 178 with permission; panel B is based on data from reference 132.)