ArticleInfection and drug resistance2026
Epidemiology, Antimicrobial Resistance, and Seasonal Dynamics of Respiratory Bacterial Pathogens in a Saudi Tertiary Care Hospital (2023-2025).
Article in Infection and drug resistance, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Respiratory tract infections (RTIs) remain a major cause of morbidity and mortality, particularly among hospitalized and critically ill patients. The increasing prevalence of multidrug-resistant organisms (MDROs) complicates treatment and highlights the need for local surveillance to guide antimicrobial stewardship. This study investigated the epidemiology, antimicrobial resistance patterns, and seasonal trends of respiratory bacterial pathogens in a tertiary care hospital in Riyadh, Saudi Arabia. Methods: A retrospective observational study was conducted on 5582 respiratory specimens collected between January 2023 and December 2025. Samples included tracheal aspirates, sputum, bronchoalveolar lavage, throat swabs, pleural fluids, ear swabs, and nasal swabs. Bacterial identification and antimicrobial susceptibility testing were performed using the VITEK® 2 Compact system and interpreted according to CLSI M100-S35 guidelines. Statistical analyses included Chi-square tests and logistic regression. Results: Culture positivity was 38.6% (2154/5582), with tracheal aspirates and sputum accounting for the most positive specimens. The predominant pathogens were Conclusions: Respiratory pathogens in this Saudi tertiary care hospital exhibited a high prevalence of multidrug resistance, particularly among Gram-negative bacteria and in critical care settings. Seasonal increases in resistance during the summer months suggest the need for intensified infection control measures, strengthened antimicrobial stewardship, and ongoing surveillance to reduce MDRO transmission and optimize patient outcomes.
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