Abstract
Crimean-Congo hemorrhagic fever virus (CCHFV) is a member of the family Bunyaviridae and is a causative agent of severe hemorrhagic disease. Knowledge regarding the pathogenesis of CCHFV is limited due to the requirement for high-containment laboratories and the lack of an immunocompetent animal host. Previous studies have shown that CCHFV delays the activation of the human innate immune response, specifically, the type I interferon response. Our study results show that antagonism of the interferon-beta promoter is mediated by the nucleoprotein of CCHFV strain Hoti, while strains IbAr10200 and AP92 do not suppress the activity of the IFN-beta promoter. Our results also suggest that several viral factors may provide antagonistic action against the type I interferon response.
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