Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA.
School of Environment and Natural Resources, College of Food Agricultural and Environmental Sciences, The Ohio State University, Columbus, OH, USA.
J Med Entomol. 2023 Sep 12;60(5):1126-1130. doi: 10.1093/jme/tjad104.
We describe the first known established Asian longhorned tick (ALT) (Acari: Ixodidae: Haemaphysalis longicornis Neumann) population in Ohio, USA. In mid-summer 2021, we collected ALTs from an infested pasture in response to an alert that grazing cattle had been infested with ticks, and 3 of them had died. No ALTs were reported following pesticide treatment of the pasture in fall 2021. In the laboratory, we identified 9,287 ticks to species, representing all 3 life stages, as ALTs and tested 100 of the adult females for infectious agents relevant to human and animal health, including Theileria orientalis, a cattle disease agent. Eight field-collected ticks were positive for Anaplasma phagocytophilum (n = 100, 8%); no other infectious agents were detected. Active environmental surveillance showed the return of ALTs in June 2022 despite the tick control efforts in 2021. As ALTs continue to expand their range in the United States, active and passive surveillance studies will be needed to characterize their evolving role in human and animal health.
我们描述了在美国俄亥俄州首次发现的亚洲长角 ticks（ALT）（蜱螨目：硬蜱科：长角血蜱）种群。2021 年夏末，我们从一个受感染的牧场中采集了 ALT，因为有警报称放牧的牛群被 ticks 感染，其中 3 头死亡。2021 年秋季对牧场进行农药处理后，没有报告发现 ALT。在实验室中，我们鉴定了 9287 只 ticks 到物种，代表了所有 3 个生活阶段，均为 ALT，并对其中 100 只成年雌虫进行了与人畜健康相关的传染性病原体检测，包括 Orientalis 泰勒虫，一种牛病病原体。8 只野外采集的 ticks 对 Anaplasma phagocytophilum 呈阳性（n = 100，8%）；未检测到其他传染性病原体。尽管 2021 年采取了 tick 控制措施，但 2022 年 6 月仍有活跃的环境监测显示 ALT 的回归。随着 ALT 在美国继续扩大其范围，需要进行主动和被动监测研究，以描述其在人类和动物健康中的不断演变的作用。
