Postoperative pneumonia in isolated coronary artery bypass grafting: A comprehensive study of epidemiology, etiology, and disease burden from China (2020-2023).

Patients aged 60–80 and over 80 years exhibited significantly higher incidence rates compared to those under 60 years (all P < 0.05) A total of 416 strains were identified, with Gram-negative bacteria accounting for 86.5%, primarily represented by Klebsiella pneumoniae (31.0%), while pseudomonas aeruginosa (21.4%) and stenotrophomonas maltophilia (5.3%) demonstrated an increasing trend in the period of 2022–2023 (both P < 0.05).

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Conversely, A.baumannii showed a decreasing trend in resistance to most antibiotics.

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