The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform
Richard W. Gerhold - One of the best experts on this subject based on the ideXlab platform.
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Emergence of the arterial worm Elaeophora schneideri in moose (Alces alces) and tabanid fly vectors in northeastern Minnesota, USA
Parasites & vectors, 2018Co-Authors: Caroline M. Grunenwald, Erika Butler, Arno Wünschmann, Aníbal G. Armién, Michelle Carstensen, Erik C. Hildebrand, Roger D. Moon, Richard W. GerholdAbstract:Moose (Alces alces) are a culturally and economically valued species in Minnesota. However, the moose population has experienced a sudden, marked decline in their range, including extirpation in the northwest and a 66% decline in the last decade in the northeast portions of the state. Although the exact cause of this decline is unclear, parasitic metastrongylid and filarioid nematode infections are known causes of morbidity and mortality in moose across North America. To determine if these parasitic nematodes could be contributing to the Minnesota moose population decline, we molecularly examined banked tissues obtained from moose that died of known and unknown causes for the presence of nematode DNA. Extracted brain DNA of 34 individual moose was amplified utilizing primers targeting the 18S rRNA gene and internal transcribed spacer regions of nematodes. DNA sequencing revealed that PCR products obtained from 15 (44.1%) of the moose were 99% identical to Parelaphostrongylus tenuis, a metastrongylid known to cause neurological disease and death. Additionally, brain tissue from 20 (58.8%) individuals yielded sequences that most closely aligned with Elaeophora schneideri, a parasite associated with neurological impairment but previously unreported in Minnesota. Setaria yehi, a common filarioid parasite of deer, was also detected in the brain tissue of 5 (14.7%) moose. Molecular screening of 618 captured tabanid flies from four trapping sites revealed E. schneideri was present (6%) in the Minnesota environment and transmission could occur locally. Prevalence rates among the flies ranged between 0–100% per trapping site, with Chrysops spp. and Hybomitra spp. implicated as the vectors. Ultimately, these data confirm that P. tenuis is widespread in the Minnesota moose population and raises the question of the significance of E. schneideri as a contributing factor to morbidity and mortality in moose.
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Elaeophora in the meninges of a Malayan sambar (Rusa unicolor equina).
Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians Inc, 2016Co-Authors: Jennifer Bernard, Caroline M. Grunenwald, Ilse H. Stalis, Megan Varney, Jeff Zuba, Richard W. GerholdAbstract:An adult nematode was grossly identified in the meninges of a Malayan sambar (Rusa unicolor equina), with numerous microfilariae associated with encephalitis and vasculitis on histopathology. The nematode was confirmed to be Elaeophora schneideri by sequencing a portion of the 18S rRNA gene. Our report highlights the potential for aberrant migration of E. schneideri in exotic deer species and the use of advanced testing to specifically identify this metazoan parasite, avoiding misidentification of Parelaphostrongylus tenuis.
William J. Adrian - One of the best experts on this subject based on the ideXlab platform.
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Elaeophora schneideri in Moose (Alces alces) from
1991Co-Authors: Dennis J. Madden, Terry R. Spraker, William J. AdrianAbstract:Two adult moose (Alces alces) from Colorado (USA) were naturally infected with Elaeophora schneiderl. Both animals had patent infections indicating that moose may serve as definitive hosts. Gross and histological lesions were characterized by fibromuscular intimal proliferation within the carotid arteries and rete mirabile cerebri. This is the first report of Elae- ophora schneideri in moose from Colorado.
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Elaeophora schneideri in moose (Alces alces) from Colorado.
Journal of wildlife diseases, 1991Co-Authors: Dennis J. Madden, Terry R. Spraker, William J. AdrianAbstract:Two adult moose (Alces alces) from Colorado (USA) were naturally infected with Elaeophora schneideri. Both animals had patent infections indicating that moose may serve as definitive hosts. Gross and histological lesions were characterized by fibromuscular intimal proliferation within the carotid arteries and rete mirabile cerebri. This is the first report of Elaeophora schneideri in moose from Colorado.
Christian Gortazar - One of the best experts on this subject based on the ideXlab platform.
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the risks of translocating wildlife pathogenic infection with theileria sp and Elaeophora elaphi in an imported red deer
Veterinary Parasitology, 2004Co-Authors: Ursula Hofle, Joaquin Vicente, Daniel Nagore, Ana Hurtado, A Pena, J De La Fuente, Christian GortazarAbstract:It is well known that the translocation of wild animals poses risks of the introduction of pathogens into populations, and regulations and recommendations regarding quarantine and screening protocols for wild animals do exist. Less is known about the infection of imported animals with local endemic pathogens. A red deer stag that had been imported from Germany was found recumbent and died from hemolytic anaemia and a process of exertional myopathy. Infection with Theileria sp. was detected in thin blood smears and confirmed by PCR and sequencing. In addition, massive parasitation by Elaeophora elaphi, a parasite endemic to Iberian red deer, was detected. Sequence comparison between the 18S rRNA gene sequence determined that the Theileria strain involved in this case had a 99.7% identity with a Theileria sp. strain obtained from sika-deer, and 95.3% identity with T. cervi. Using sequence distance analysis, the strain from red deer grouped with isolates from Cervus spp. as opposed to isolates from Odocoileus spp. and bovines. Both detected parasites are of little pathogenicity to local red deer, but were pathogenic for the imported red deer from Northern Europe. This case demonstrates that local endemic pathogens may pose naive translocated animals at risk, and illustrates the need for thorough examination and planification of translocation protocols.
Caroline M. Grunenwald - One of the best experts on this subject based on the ideXlab platform.
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Emergence of the arterial worm Elaeophora schneideri in moose (Alces alces) and tabanid fly vectors in northeastern Minnesota, USA
Parasites & vectors, 2018Co-Authors: Caroline M. Grunenwald, Erika Butler, Arno Wünschmann, Aníbal G. Armién, Michelle Carstensen, Erik C. Hildebrand, Roger D. Moon, Richard W. GerholdAbstract:Moose (Alces alces) are a culturally and economically valued species in Minnesota. However, the moose population has experienced a sudden, marked decline in their range, including extirpation in the northwest and a 66% decline in the last decade in the northeast portions of the state. Although the exact cause of this decline is unclear, parasitic metastrongylid and filarioid nematode infections are known causes of morbidity and mortality in moose across North America. To determine if these parasitic nematodes could be contributing to the Minnesota moose population decline, we molecularly examined banked tissues obtained from moose that died of known and unknown causes for the presence of nematode DNA. Extracted brain DNA of 34 individual moose was amplified utilizing primers targeting the 18S rRNA gene and internal transcribed spacer regions of nematodes. DNA sequencing revealed that PCR products obtained from 15 (44.1%) of the moose were 99% identical to Parelaphostrongylus tenuis, a metastrongylid known to cause neurological disease and death. Additionally, brain tissue from 20 (58.8%) individuals yielded sequences that most closely aligned with Elaeophora schneideri, a parasite associated with neurological impairment but previously unreported in Minnesota. Setaria yehi, a common filarioid parasite of deer, was also detected in the brain tissue of 5 (14.7%) moose. Molecular screening of 618 captured tabanid flies from four trapping sites revealed E. schneideri was present (6%) in the Minnesota environment and transmission could occur locally. Prevalence rates among the flies ranged between 0–100% per trapping site, with Chrysops spp. and Hybomitra spp. implicated as the vectors. Ultimately, these data confirm that P. tenuis is widespread in the Minnesota moose population and raises the question of the significance of E. schneideri as a contributing factor to morbidity and mortality in moose.
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Elaeophora in the meninges of a Malayan sambar (Rusa unicolor equina).
Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians Inc, 2016Co-Authors: Jennifer Bernard, Caroline M. Grunenwald, Ilse H. Stalis, Megan Varney, Jeff Zuba, Richard W. GerholdAbstract:An adult nematode was grossly identified in the meninges of a Malayan sambar (Rusa unicolor equina), with numerous microfilariae associated with encephalitis and vasculitis on histopathology. The nematode was confirmed to be Elaeophora schneideri by sequencing a portion of the 18S rRNA gene. Our report highlights the potential for aberrant migration of E. schneideri in exotic deer species and the use of advanced testing to specifically identify this metazoan parasite, avoiding misidentification of Parelaphostrongylus tenuis.
David W Oates - One of the best experts on this subject based on the ideXlab platform.
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first observation of Elaeophora schneideri wehr and dikmans 1935 nematoda filariidae in mule deer from nebraska
Journal of Wildlife Diseases, 2007Co-Authors: Richard D Mckown, Mauritz C Sterner, David W OatesAbstract:Between November 2000 and November 2005, approximately 200 mule deer (Odocoileus hemionus hemionus) and white-tailed deer (Odocoileus virginianus) from western Nebraska were extensively examined for the presence of Elaeophora schneideri, Wehr and Dikmans, 1935; three adult E. schneideri were detected from three mule deer. This represents the first documented occurrence of E. schneideri from wild deer in Nebraska.