pathogens Article First Serological Evidence of Crimean-Congo Hemorrhagic Fever Virus and Rift Valley Fever Virus in Ruminants in Tunisia Khaoula Zouaghi 1, Ali Bouattour 1, Hajer Aounallah 1 , Rebecca Surtees 2, Eva Krause 2, Janine Michel 2 , Aymen Mamlouk 3 , Andreas Nitsche 2 and Youmna M’ghirbi 1,* 1 Laboratory of Viruses Vectors and Hosts (LR20IPT02), Institute Pasteur of Tunis, University of Tunis El Manar, Tunis 1002, Tunisia;
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[email protected] Abstract: Crimean-Congo hemorrhagic fever virus (CCHFV, Nairoviridae family) and Rift Valley fever virus (RVFV, Phenuiviridae family) are zoonotic vector-borne pathogens with clinical relevance worldwide. Our study aimed to determine seroprevalences of these viruses and potential risk fac- tors among livestock (cattle, sheep, and goats) in Tunisia. Sera were tested for antibodies against Citation: Zouaghi, K.; Bouattour, A.; CCHFV (n = 879) and RVFV (n = 699) using various enzyme-linked immunosorbent assays (ELISAs) Aounallah, H.; Surtees, R.; Krause, E.; and indirect immunofluorescence assays (IIFA). The overall seroprevalence of IgG antibodies was Michel, J.; Mamlouk, A.; Nitsche, A.; 8.6% (76/879) and 2.3% (16/699) against CCHFV and RVFV, respectively.