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Background  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.    Methods  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.    Results  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.    Conclusions  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.

parasites and vectors

Retrospective investigation of Echinococcus canadensis emergence in translocated elk (Cervus canadensis) in Tennessee, USA, and examination of canid definitive hosts