Sheep and Cattle Are Not Susceptible to Experimental Inoculation with Hazara Orthonairovirus, a Tick-Borne Arbovirus Closely Related to CCHFV.

Sheep and Cattle Are Not Susceptible to Experimental Inoculation with Hazara Orthonairovirus, a Tick-Borne Arbovirus Closely Related to CCHFV.
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DOI:
10.3390/microorganisms8121927
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发表时间:
2020-12-04
期刊:
影响因子:
4.5
通讯作者:
Keller M
Keller M
中科院分区:
生物学3区
文献类型:
--
作者:
Hartlaub J;von Arnim F;Fast C;Somova M;Mirazimi A;Groschup MH;Keller M

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哈扎拉正鼻病毒(HAZV)是一种蜱传虫媒病毒,与克里米亚-刚果出血热正鼻病毒(CCHFV)密切相关。 CCHFV 是生物安全级别 (BSL) 4 级病毒,而 HAZV 被归类为 BSL 2 级,因为目前尚不清楚它会引起人类任何疾病。 HAZV 与 CCHFV 属于同一血清群,HAZV 可能作为一个模型,可以帮助人们更好地了解这种重要的人畜共患病。此外,如果 HAZV 抗体干扰当前的 CCHFV 血清学检测,则血清学相关性可能会导致诊断问题。因此,对 CCHFV 的重要天然宿主羊和牛进行了 HAZV 感染实验,以证明其易感性并评估潜在的抗体交叉反应性。根据这项研究,绵羊和牛都不易受到实验性 HAZV 感染。因此,反刍动物中的 HAZV 感染明显不同于 CCHFV 感染。在免疫荧光和免疫印迹测定中,免疫动物的血清在 HAZV 和 CCHFV 之间有微弱的交叉反应,但在常用于现场研究的商业 CCHFV ELISA 中则没有。
Hazara orthonairovirus (HAZV) is a tick-borne arbovirus closely related to Crimean–Congo hemorrhagic fever orthonairovirus (CCHFV). Whereas CCHFV is a biosafety level (BSL) 4 agent, HAZV is classified as BSL 2, as it is not known to cause any disease in humans. Belonging to the same serogroup as CCHFV, HAZV might act as a model which can provide a better understanding of this important zoonosis. Furthermore, the serological relatedness may cause diagnostic problems if antibodies against HAZV interfere with current CCHFV serological assays. Therefore, sheep and cattle—important natural hosts for CCHFV—were experimentally infected with HAZV to prove their susceptibility and evaluate potential antibody cross-reactivities. According to this study, neither sheep nor cattle are susceptible to experimental HAZV infections. Consequently, the HAZV infection in ruminants is clearly distinct from CCHFV infections. Sera of immunized animals weakly cross-reacted between HAZV and CCHFV in immunofluorescence and immunoblot assays, but not in commercial CCHFV ELISAs commonly used for field studies.
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