Department of Biomedical and Diagnostic Sciences, University of Tennessee College of Veterinary Medicine, 2407 River Drive, Knoxville, TN, 37996, USA.
Long Island University College of Veterinary Medicine, 720 Northern Boulevard, Brookville, NY, 11548, USA.
Parasit Vectors. 2020 Jun 30;13(1):330. doi: 10.1186/s13071-020-04198-9.
Few reports of Echinococcus spp. have been described in the USA; however, the geographical distribution of Echinococcus spp. in wild hosts is increasing consequent to human activities. In the early 2000's, 253 elk (Cervus canadensis) originating from Alberta, Canada were released into the Great Smoky Mountains National Park and North Cumberland Wildlife Management Area in an effort to re-establish their historical range.
We investigated the prevalence of Echinococcus spp. in re-established elk populations in the North Cumberland Wildlife Management Area and the Great Smoky Mountains National Park via a retrospective analysis of banked elk tissues and helminth examinations on intestinal contents from coyotes (Canis latrans) from the North Cumberland Wildlife Management Area.
Four elk were PCR and sequence positive for E. canadensis. Each sequence had 98% or greater coverage and identity to multiple E. canadensis genotypes on GenBank. Adult Echinococcus spp. were not detected in any of the coyotes examined in this study.
Continued surveillance of this disease in susceptible species in these areas is warranted, and these data further underscore the risk of zoonotic pathogen introduction secondary to wildlife translocation.
在美国，有关细粒棘球绦虫的报道较少；然而，由于人类活动，细粒棘球绦虫在野生动物宿主中的地理分布正在增加。21 世纪初，为了重新建立其历史分布范围，从加拿大艾伯塔省引进了 253 头麋鹿（Cervus canadensis）到大雾山国家公园和北坎伯兰野生动物管理区。
我们通过对北坎伯兰野生动物管理区银行储存的麋鹿组织进行回顾性分析，并对北坎伯兰野生动物管理区的郊狼（Canis latrans）肠道内容物进行寄生虫检查，调查了北坎伯兰野生动物管理区和大雾山国家公园重新建立的麋鹿种群中细粒棘球绦虫的流行情况。
4 头麋鹿的 PCR 和序列均对加拿大棘球绦虫呈阳性。每个序列与 GenBank 上多个加拿大棘球绦虫基因型的覆盖率和同一性均达到 98%或更高。在本研究中检查的任何郊狼中均未检测到成年细粒棘球绦虫。
有必要继续在这些地区的易感物种中对这种疾病进行监测，这些数据进一步强调了由于野生动物转移而导致人畜共患病病原体引入的风险。
