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. 2021 Feb 1;203(3):328–338. doi: 10.1164/rccm.202004-1322OC

Figure 4.

Figure 4.

(A) Duration of positivity for Staphylococcus aureus and Pseudomonas aeruginosa between January 1, 2004, and December 31, 2017. Dots represent time from initial to final cultures that were simultaneously positive for Pseudomonas aeruginosa and methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-resistant Staphylococcus aureus (MRSA), or either phenotype of S. aureus. The number of individuals per group is shown at top. Forty-three individuals had both MSSA and MRSA during the study. (B) Percentage of cultures that were double-positive for S. aureus and P. aeruginosa among subjects with ≥2 double-positive cultures. Dots represent the percentage of cultures between the first and last double-positive culture that were simultaneously positive for P. aeruginosa and the subtype of S. aureus listed at bottom. The number of individuals per group is given at the top. Initial and final cultures were excluded from this statistic, as they are double-positive by definition. Subjects having only two double-positive cultures obtained consecutively were excluded. MRSA had greater persistence compared with MSSA. *P < 0.05 by Wilcoxon signed-rank test.