Correlation Between Respiratory Colonization With Gram-Negative Bacteria and Development of Gram-Negative Bacterial Infection After Cardiac Surgery

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This pilot, observational study involving 286 patients who underwent cardiac surgery found that patients who had endotracheal colonization with gram-negative bacteria at 1 week after surgery were more likely to develop subsequent infection compared to those without colonization (8 of 23 vs. 4 of 40; relative risk 2.3 [95% confidence interval, 1.3–4.1; P value <.05]).

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