Objective To understand the clinical characteristics of dengue fever cases in a large general hospital located in a dengue fever category Ⅱ area, and to provide scientific evidence for formulating dengue fever prevention and control strategies for similar medical institutions. Methods The dengue fever case data reported by West China Hospital of Sichuan University between January 1, 2015, and December 31, 2024 were retrospectively collected, and their clinical characteristics were analyzed. Results A total of 56 dengue fever cases were reported, with the majority being confirmed cases (76.79%) and no deaths. Among the confirmed cases, there was one severe case. The primary department for initial diagnosis was emergency department, followed by fever clinic. Most cases were mild, and patients were treated with oral symptomatic medications and observed at home. The seasonal distribution of dengue fever cases was evident. The male-to-female ratio was 0.93∶1, with an average age of 34.07 years. The majority of cases were in the commercial service sector. There were no local cases, 55 were imported cases, and 1 case, which was the only severe dengue fever case, may have been transmitted through non-mosquito vectors. Conclusion In dengue fever category Ⅱ areas, large general hospitals should prioritize the early identification of imported dengue fever cases and implement standardized treatment for these cases, to prevent the risk of local transmission caused by the importation of dengue fever outbreaks.
