Shahrekord University of Medical Sciences Epidemiology and Health System Journal 2980-7891 12 3 2025 10 29 The Role of Epidemiologist in the Hospital Infection Control Team 171 176 10.34172/ehsj.26322 EN Saied Bokaie https://orcid.org/0000-0003-3505-0270 Alireza Bahonar https://orcid.org/0000-0002-0846-282X Ehsan Mosa Farkhani https://orcid.org/0000-0002-0474-5611 Abolghasem Shokri https://orcid.org/0000-0002-5895-6107 Journal Article 10.34172/ehsj.26322 2024 12 06 2025 10 12 Background and aims: Epidemiologists play a pivotal role in the hospital infection control team (HICT) by applying the principles of disease surveillance, outbreak investigation, and data analysis. In addition, they help prevent and control healthcare-associated infections (HCAIs) while improving patient outcomes. This paper highlights essential contributions of these health workers within the HICT. Methods: A descriptive review was conducted through searching PubMed, Scopus, and Google Scholar databases using several keywords, such as "epidemiologist(s), healthcare-associated infections, HICT, infection, and infection prevention and control (IPC)". English articles published within the last ten years focusing on the role of epidemiologists in hospital IPC were included in this review. Results: The findings revealed that epidemiologists contribute to identifying risk factors, detecting outbreaks, and developing evidence-based interventions. Moreover, they guide infection control practices, quality improvement initiatives, and education for healthcare workers. Effective collaboration between epidemiologists and HICT ensures a data-driven approach to IPC, leading to reduced infection rates, improved patient outcomes, and cost-effective healthcare delivery. Conclusion: In general, integrating epidemiologists into HICT is essential for implementing evidence-based strategies to control HCAIs. More precisely, their involvement enhances patient safety, informs policy, and strengthens infection prevention efforts.