Tehran University of Medical Sciences Iranian Journal of Microbiology 2008-3289 13 2 2021 04 10 248 251 Behzad Mohsenpour Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Infectious Diseases, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran Amjad Ahmadi Department of Microbiology, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran Anvar Mohammadi Baneh Department of Internal Medicine, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran Ebrahim Ghaderi Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Epidemiology and Biostatistics, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran Shahla Afrasiabian Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Infectious Diseases, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran Samaneh Azizi Students Research Committee, Kurdistan University of Medical Sciences, Sanandaj, Iran Katayoon Hajibagheri Zoonoses Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Infectious Diseases, School of Medicine, Kurdistan University of Medical Sciences, Sanandaj, Iran 2019 01 22 2021 03 21 Background and Objectives: Brucellosis is a zoonotic disease that is caused by the Brucella species. This disease is common in Iran and its incidence is increasing .This study measures serum vitamin D levels in patients with brucellosis and healthy people. Materials and Methods: This research was conducted as a case-control study at Tohid Hospital, Sanandaj, Iran. The calculated sample size included 90 patients in the case group and 90 patients in the control group. The measurement of vitamin D levels in the case and control groups were performed by ELISA. Results: The mean serum vitamin D level was 19.91 ng/ml in the case group and 22.87 ng/ml in the control group. (Serum vitamin D level <10 ng/mL is accepted as deficiency, 10-30 ng/mL as insufficiency, 30-100 ng/mL as sufficiency, and >100 ng/mL as toxicity). Conclusion: There was no significant difference between the two groups in terms of vitamin D deficiency (p-value=0.097). https://ijm.tums.ac.ir/index.php/ijm/article/view/2011 https://ijm.tums.ac.ir/index.php/ijm/article/download/2011/1340