Mixed carriage was observed less frequently in positive samples following one or two immediately preceding negative samples (odds ratio [OR] versus previous positive sample, 0.60 [95% confidence interval {95% CI}, 0.29 to 1.24] and 0.32 [95% CI, 0.08 to 1.33], respectively), but differences did not reach statistical significance ( P = 0.16 and P = 0.12, respectively).
1
0.1600
0.1600