• Mohammed Kanan Alshammari, Mzoun Abdulaziz Alotaibi, Ahad Sanad AlOtaibi, Hanan Tareq Alosaime, Mona Awadh Aljuaid, Budur Mohammed Alshehri, Yasmen Bejad AlOtaibi, Asma Ali Alasmari, Ghadi Ali Alasmari, Maram Hussain Mohammed, Shumukh Mohammed Althobaiti, Reem Abdulrahman Almuhaya, Taef Awadh Alkhoshi, Asma Sulayyih Alosaimi, and Alanoud Akeel Alotaibi.
• Department of Clinical Pharmacy, King Fahad Medical City, Riyadh 12211, Saudi Arabia.
• Medicina (Kaunas). 2023 Apr 13; 59 (4).

Abstract(1) Background and Objectives: Pneumonia is a major cause of morbidity and mortality worldwide, including in Saudi Arabia, and the prevalence and etiology of the disease varies depending on the setting. The development of effective strategies can help reduce the adverse impact of this disease. Therefore, this systematic review was conducted to explore the prevalence and etiology of community-acquired and hospital-acquired pneumonia in Saudi Arabia, as well as their antimicrobial susceptibility. (2) Materials and Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 recommendations were followed for this systematic review. Several databases were used to perform a thorough literature search, and papers were then assessed for eligibility by two independent reviewers. The Newcastle-Ottawa Scale (NOS) was used to extract the data from the relevant research and evaluate its quality. (3) Results: This systematic review included 28 studies that highlighted the fact that gram-negative bacteria, particularly Acinetobacter spp. and Pseudomonas aeruginosa, were the common cause of hospital-acquired pneumonia, while Staphylococcus aureus and Streptococcus spp. were responsible for community-acquired pneumonia in children. The study also found that bacterial isolates responsible for pneumonia showed high resistance rates against several antibiotics, including cephalosporins and carbapenems. (4) Conclusions: In conclusion, the study found that different bacteria are responsible for community- and hospital-acquired pneumonia in Saudi Arabia. Antibiotic resistance rates were high for several commonly used antibiotics, highlighting the need for rational antibiotic use to prevent further resistance. Moreover, there is a need to conduct more regular multicenter studies to assess etiology, resistance, and susceptibility patterns of pneumonia-causing pathogens in Saudi Arabia.

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