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CT values versus those of semiquantitative VRE culture. The horizontal line in each floating box represents the median CT value, and the length of each box reflects the range (minimum to maximum) of CT values for each semiquantitative result. *, P value of <0.0001 compared to culture-negative VRE (CNVRE). VRE, vancomycin-resistant enterococcus species. 1+, 1 to 9 colonies; 2+, 1 to 49 colonies; 3+, 5 to 300 colonies; 4+, >300 colonies.