Investigation of Crimean-Congo Hemorrhagic Fever Virus Transmission from Patients to Relatives: A Prospective Contact Tracing Study

Mustafa Gokhan Gozel Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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Mehmet Bakir Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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Atifet Yasemin Oztop Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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Aynur Engin Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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Ilyas Dokmetas Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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Nazif Elaldi Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey; Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey

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We investigated the possibility of transmission of Crimean-Congo hemorrhagic fever (CCHF) virus through respiratory and physical contact. In this prospective study, we traced 116 close relatives of confirmed CCHF cases who were in close contact with the patients during the acute phase of the infection and evaluated the type of contact between patients and their relatives. These relatives were followed for clinical signs or symptoms indicative of CCHF disease, blood samples of those with and without clinical signs were analyzed for CCHF virus immunoglobulin M and G (IgM and IgG, respectively) by enzyme-linked immunosorbent assay. No close relatives developed any signs or symptoms of CCHF and were negative for CCHF virus IgM and IgG. The results suggest that CCHF virus is not easily transmitted from person to person through respiratory or physical contact.

Author Notes

* Address correspondence to Mustafa Gokhan Gozel, Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, 58140, Sivas, Turkey. E-mail: mggozel@yahoo.com

Financial support: This work was supported by the Scientific Research Project Fund of Cumhuriyet University (11.10.2010, T-438).

Authors' addresses: Mustafa Gokhan Gozel, Mehmet Bakir, Aynur Engin, Ilyas Dokmetas, and Nazif Elaldi, Department of Infectious Diseases and Clinical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey, E mails: mggozel@yahoo.com, mehmetbakir57@yahoo.com.tr, aynurum2000@yahoo.com, idokmetas@yahoo.com.tr, and nelaldi61@yahoo.com. Atifet Yasemin Oztop, Department of Medical Microbiology, Cumhuriyet University Medical School, Sivas, Turkey, E-mail: yaseminoztop@yahoo.com.tr.

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