Tehran University of Medical Sciences Journal of Arthropod-Borne Diseases 2322-1984 11 4 2017 12 30 463 468 EN Fazilet Duygu Public Health Institution of Turkey, Ankara, Turkey Tugba Sari Public Health Institution of Turkey, Ankara, Turkey Turan Kaya Tokat State Hospital, Department of Infectious Diseases and Clinical Microbiology, Tokat, Turkey Nermin Bulut Gaziosmanpasa University Faculty of Medicine, Department of Microbiology and Clinical Microbiology, Tokat, Turkey 2017 12 16 2017 12 16 Background: Crimean-Congo hemorrhagic fever (CCHF) is a fatal zoonotic viral disease caused by infection with a tick-borne virus of the genus Nairovirus. In this study, we investigated the incidence of brucellosis in patients diag­nosed with CCHF. Methods: Overall, 169 patients hospitalized with an initial diagnosis of CCHF were included in 2011 in To­kat/ Turkey. Immunoglobulin M (IgM) antibodies and/or PCR results were used in the laboratory diagnosis of CCHF, while plate and standard tube agglutination (STA) tests were used to diagnose brucellosis. Results: Overall, 120 patients (79%) with positive PCR tests were diagnosed with CCHF. Five (4.16%) were also diag­nosed with brucellosis based on the positive plate and STA test results. Four patients (2.36%) had negative CCHF PCR and positive STA test results. Conclusion: Brucellosis and CCHF can mimic each other and that all patients with CCHF or brucellosis should be screened for both conditions. https://jad.tums.ac.ir/index.php/jad/article/view/770 https://jad.tums.ac.ir/index.php/jad/article/download/770/359