scholarly journals Retrospective Investigation of Echinococcus granulosus Emergence in Translocated Elk (Cervus canadensis) in Tennessee (USA) and Examination of Canid Definitive Hosts

2020 ◽  
Author(s):  
BreeAnna Mary Dell ◽  
Shelley J. Newman ◽  
Kathryn Purple ◽  
Brad Miller ◽  
Edward Ramsay ◽  
...  

Abstract Background Few reports of Echinococcus granulosus have been described in the Unites States; however, the geographical distribution of Echinococcus spp. in wild hosts is increasing consequent to human activities. Methods We investigated the prevalence of Echinococcus spp. in re-established elk ( Cervus canadensis ) populations in the North Cumberland Wildlife Management Area and the Great Smoky Mountains National Park via a retrospective analysis of banked elk tissues and an examination of intestinal contents from 11 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 in 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.

2020 ◽  
Author(s):  
BreeAnna Mary Dell ◽  
Shelley J. Newman ◽  
Kathryn Purple ◽  
Brad Miller ◽  
Edward Ramsay ◽  
...  

Abstract Background: Few reports of Echinococcus granulosus have been described in the Unites States; however, the geographical distribution of Echinococcus spp. in wild hosts is increasing consequent to human activities. Methods:We investigated the prevalence of Echinococcus spp. in re-established elk ( Cervus canadensis ) populations in the North Cumberland Wildlife Management Area and the Great Smoky Mountains National Park via a retrospective analysis of banked elk tissues and an examination of intestinal contents from 11 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 in 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.


2020 ◽  
Author(s):  
BreeAnna Mary Dell ◽  
Shelley J. Newman ◽  
Kathryn Purple ◽  
Brad Miller ◽  
Edward Ramsay ◽  
...  

Abstract Background: Few reports of Echinococcus spp. have been described in the Unites States; 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 in 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.


Zootaxa ◽  
2007 ◽  
Vol 1390 (1) ◽  
pp. 17 ◽  
Author(s):  
MATTHEW L. GIMMEL ◽  
ADAM SLIPINSKI

A new species of cerylonid with reduced eyes from the Great Smoky Mountains, Philothermus stephani sp. n., is described and illustrated. A revised key to the North American species of Philothermus is presented.


Zootaxa ◽  
2018 ◽  
Vol 4496 (1) ◽  
pp. 411
Author(s):  
ROBERTO CARRERA-MARTÍNEZ ◽  
MAC A. JR. CALLAHAM

The genus Lumbricus L. was the first described genus of earthworms, with L. terrestris as its type species. The genus can be easily distinguished because it is the only lumbricid genus with a tanylobic prostomium, with the exception of the North American native Bimastos eiseni (Levinsen). With six known Lumbricus species introduced in North America (Reynolds & Wetzel, 2012), Lumbricus rubellus is one of the most widespread. In addition, L. rubellus has been associated with negative ecological effects as result of its invasion (Greiner et al. 2012). The Great Smoky Mountains National Park in Tennessee and North Carolina, USA, is no exception from earthworm invasions (Snyder et al. 2011). Recent research in an area near the extreme southwestern end of the Park (35.5538º N; 83.9943º W), resulted in the collection of ten specimens of L. rubellus, on 27 July 2011. Among these specimens was one that had an abnormal epilobic prostomium and under-developed tubercula pubertatis, whereas the rest had the typical Lumbricus tanylobic prostomia and fully developed tubercula pubertatis. To facilitate discrimination and identification in future encounters of an epilobic L. rubellus we provide here a full description of this specimen. To our knowledge, this is the first reported case of a specimen of L. rubellus with an epilobic prostomium. The specimen will be deposited in the nascent Terrestrial Oligochaete Collection at the Georgia Museum of Natural History in Athens, Georgia, USA. The specimen was fixed in 10% formalin, and is preserved in 70% ethanol.


Zootaxa ◽  
2007 ◽  
Vol 1390 (1) ◽  
pp. 17-20
Author(s):  
MATTHEW L. GIMMEL ◽  
ADAM SLIPINSKI

A new species of cerylonid with reduced eyes from the Great Smoky Mountains, Philothermus stephani sp. n., is described and illustrated. A revised key to the North American species of Philothermus is presented.


2019 ◽  
Vol 39 (4) ◽  
pp. 482
Author(s):  
Alix A. Pfennigwerth ◽  
Joshua Albritton ◽  
Troy Evans

Nematology ◽  
2016 ◽  
Vol 18 (8) ◽  
pp. 879-903 ◽  
Author(s):  
Thomas O. Powers ◽  
Peter Mullin ◽  
Rebecca Higgins ◽  
Timothy Harris ◽  
Kirsten S. Powers

A new species of Mesocriconema and a unique assemblage of plant-parasitic nematodes was discovered in a heath bald atop Brushy Mountain in Great Smoky Mountains National Park. Mesocriconema ericaceum n. sp., a species with males, superficially resembles M. xenoplax. DNA barcoding with the mitochondrial COI gene provided evidence of the new species as a distinct lineage. SEM revealed significant variability in arrangement of labial submedian lobes, plates, and anterior and posterior annuli. Three other nematodes in the family Criconematidae were characterised from the heath bald. Ogma seymouri, when analysed by statistical parsimony, established connections with isolates from north-eastern Atlantic coastal and north-western Pacific coastal wet forests. Criconema loofi has a southern Gulf Coast distribution associated with boggy soils. Criconema cf. acriculum is known from northern coastal forests of California. Understanding linkages between these species and their distribution may lead to the broader development of a terrestrial soil nematode biogeography.


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