The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Paul H Walz - One of the best experts on this subject based on the ideXlab platform.
-
transmission of bovine viral diarrhea virus among white tailed deer Odocoileus virginianus
Veterinary Research, 2010Co-Authors: Thomas Passler, Stephen S Ditchkoff, Daniel M Givens, Kenny V Brock, Randy W Deyoung, Paul H WalzAbstract:Cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV), a pestivirus in the family Flaviviridae, are an important source of viral transmission to susceptible hosts. Persistent BVDV infections have been identified in white-tailed deer (Odocoileus virginianus), the most abundant free- ranging ruminant in North America. As PI deer shed BVDV similarly to PI cattle, maintenance of BVDV within white-tailed deer populations may be possible. To date, intraspecific transmission of BVDV in white- tailed deer has not been evaluated, which prompted this study. Six pregnant white-tailed deer were captured in the first trimester of pregnancy and cohabitated with a PI white-tailed deer. Cohabitation with the PI deer resulted in BVDV infection in all does, as indicated by seroconversion. All does gave birth to live fawns and no reproductive losses were observed. At birth, evidence of BVDV infection was identified in two singlet fawns, of which one was determined to be PI by repeated serum reverse transcription nested PCR, whole blood virus isolation and immunohistochemistry. This study demonstrates for the first time that BVDV transmission may occur among white-tailed deer. The birth of a PI fawn through contact to a PI white-tailed deer indicates that under appropriate circumstances, BVDV may be maintained in white-tailed deer by congenital infection. bovine viral diarrhea virus / BVDV transmission / Odocoileus virginianus / persistent infection / white-tailed deer
William R. Davidson - One of the best experts on this subject based on the ideXlab platform.
-
Evaluation of White-Tailed Deer (Odocoileus virginianus) as Natural Sentinels for Anaplasma phagocytophilum
Vector borne and zoonotic diseases (Larchmont N.Y.), 2006Co-Authors: Vivien G Dugan, Susan E Little, Michael J Yabsley, David E Stallknecht, Cynthia M Tate, Daniel G. Mead, Ulrike G. Munderloh, Michael J. Herron, William R. DavidsonAbstract:Anaplasma phagocytophilum, the causative agent of human granulocytotropic anaplasmosis, can infect white-tailed deer (WTD; Odocoileus virginianus), and this species is a crucial host for adult Ixod...
-
ehrlichia ewingii infection in white tailed deer Odocoileus virginianus
Emerging Infectious Diseases, 2002Co-Authors: Michael J Yabsley, Susan E Little, Vivien G Dugan, David E Stallknecht, Andrea S Varela, Cynthia M Tate, William R. DavidsonAbstract:Two closely related zoonotic ehrlichiae, Ehrlichia chaffeensis and E. ewingii, are transmitted by Amblyomma americanum, the lone star tick. Because white-tailed deer (Odocoileus virginianus) are critical hosts for all mobile stages of A. americanum and are important vertebrate reservoirs of E. chaffeensis, we investigated whether deer may be infected with E. ewingii, a cause of granulocytotropic ehrlichiosis in humans and dogs. To test for E. ewingii infection, we used polymerase chain reaction and inoculation of fawns with whole blood from wild deer. Of 110 deer tested from 20 locations in 8 U.S. states, 6 (5.5%) were positive for E. ewingii. In addition, natural E. ewingii infection was confirmed through infection of captive fawns. These findings expand the geographic distribution of E. ewingii, along with risk for human infection, to include areas of Kentucky, Georgia, and South Carolina. These data suggest that white-tailed deer may be an important reservoir for E. ewingii.
-
Prevalence of Antibodies to Neospora caninum in White-Tailed Deer, Odocoileus virginianus, From the Southeastern United States
The Journal of Parasitology, 2002Co-Authors: David S. Lindsay, S. E. Little, William R. DavidsonAbstract:Serum samples from 305 white-tailed deer (Odocoileus virginianus) from 14 states in the southeastern United States were examined for antibodies to Neospora caninum using a direct agglutination test. Positive agglutination titers were found in 145 (48%) of the white-tailed deer examined: 21 (7%) had titers of 1:25, 92 (30%) had titers of 1:50, and 32 (10%) had titers of ≥1:500. These findings that antibodies to N. caninum are common in white-tailed deer support the concept that a sylvatic cycle might exist for this economically important parasite of domestic cattle.
-
MORBIDITY AND MORTALITY FACTORS IN KEY DEER (Odocoileus virginianus CLAVIUM)
Journal of wildlife diseases, 2002Co-Authors: Victor F. Nettles, Charlotte F. Quist, Tom J. Wilmers, Roel R. Lopez, Phil Frank, Wayne Roberts, Sharon Chitwood, William R. DavidsonAbstract:The population health of endangered Key deer (Odocoileus virginianus clavium) was monitored from 10 February 1986 to 28 September 2000 by necropsy of animals that were killed by vehicles, euthanized because of terminal injuries or disease conditions, or found dead. The predominant mortality factor during the period was collision with motor vehicles; however, several infectious diseases were diagnosed, including infections with Arcanobacterium pyogenes, Haemonchus contortus, Salmonella spp., and Mycobacterium avium subsp. paratuberculosis. During the period monitored, the only infectious disease that was thought to have affected population dynamics was haemonchosis. Nevertheless, several of the observed diseases have potential to impact viability of the Key deer population under appropriate environmental conditions.
Thomas Passler - One of the best experts on this subject based on the ideXlab platform.
-
transmission of bovine viral diarrhea virus among white tailed deer Odocoileus virginianus
Veterinary Research, 2010Co-Authors: Thomas Passler, Stephen S Ditchkoff, Daniel M Givens, Kenny V Brock, Randy W Deyoung, Paul H WalzAbstract:Cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV), a pestivirus in the family Flaviviridae, are an important source of viral transmission to susceptible hosts. Persistent BVDV infections have been identified in white-tailed deer (Odocoileus virginianus), the most abundant free- ranging ruminant in North America. As PI deer shed BVDV similarly to PI cattle, maintenance of BVDV within white-tailed deer populations may be possible. To date, intraspecific transmission of BVDV in white- tailed deer has not been evaluated, which prompted this study. Six pregnant white-tailed deer were captured in the first trimester of pregnancy and cohabitated with a PI white-tailed deer. Cohabitation with the PI deer resulted in BVDV infection in all does, as indicated by seroconversion. All does gave birth to live fawns and no reproductive losses were observed. At birth, evidence of BVDV infection was identified in two singlet fawns, of which one was determined to be PI by repeated serum reverse transcription nested PCR, whole blood virus isolation and immunohistochemistry. This study demonstrates for the first time that BVDV transmission may occur among white-tailed deer. The birth of a PI fawn through contact to a PI white-tailed deer indicates that under appropriate circumstances, BVDV may be maintained in white-tailed deer by congenital infection. bovine viral diarrhea virus / BVDV transmission / Odocoileus virginianus / persistent infection / white-tailed deer
Stephen S Ditchkoff - One of the best experts on this subject based on the ideXlab platform.
-
transmission of bovine viral diarrhea virus among white tailed deer Odocoileus virginianus
Veterinary Research, 2010Co-Authors: Thomas Passler, Stephen S Ditchkoff, Daniel M Givens, Kenny V Brock, Randy W Deyoung, Paul H WalzAbstract:Cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV), a pestivirus in the family Flaviviridae, are an important source of viral transmission to susceptible hosts. Persistent BVDV infections have been identified in white-tailed deer (Odocoileus virginianus), the most abundant free- ranging ruminant in North America. As PI deer shed BVDV similarly to PI cattle, maintenance of BVDV within white-tailed deer populations may be possible. To date, intraspecific transmission of BVDV in white- tailed deer has not been evaluated, which prompted this study. Six pregnant white-tailed deer were captured in the first trimester of pregnancy and cohabitated with a PI white-tailed deer. Cohabitation with the PI deer resulted in BVDV infection in all does, as indicated by seroconversion. All does gave birth to live fawns and no reproductive losses were observed. At birth, evidence of BVDV infection was identified in two singlet fawns, of which one was determined to be PI by repeated serum reverse transcription nested PCR, whole blood virus isolation and immunohistochemistry. This study demonstrates for the first time that BVDV transmission may occur among white-tailed deer. The birth of a PI fawn through contact to a PI white-tailed deer indicates that under appropriate circumstances, BVDV may be maintained in white-tailed deer by congenital infection. bovine viral diarrhea virus / BVDV transmission / Odocoileus virginianus / persistent infection / white-tailed deer
Daniel M Givens - One of the best experts on this subject based on the ideXlab platform.
-
transmission of bovine viral diarrhea virus among white tailed deer Odocoileus virginianus
Veterinary Research, 2010Co-Authors: Thomas Passler, Stephen S Ditchkoff, Daniel M Givens, Kenny V Brock, Randy W Deyoung, Paul H WalzAbstract:Cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV), a pestivirus in the family Flaviviridae, are an important source of viral transmission to susceptible hosts. Persistent BVDV infections have been identified in white-tailed deer (Odocoileus virginianus), the most abundant free- ranging ruminant in North America. As PI deer shed BVDV similarly to PI cattle, maintenance of BVDV within white-tailed deer populations may be possible. To date, intraspecific transmission of BVDV in white- tailed deer has not been evaluated, which prompted this study. Six pregnant white-tailed deer were captured in the first trimester of pregnancy and cohabitated with a PI white-tailed deer. Cohabitation with the PI deer resulted in BVDV infection in all does, as indicated by seroconversion. All does gave birth to live fawns and no reproductive losses were observed. At birth, evidence of BVDV infection was identified in two singlet fawns, of which one was determined to be PI by repeated serum reverse transcription nested PCR, whole blood virus isolation and immunohistochemistry. This study demonstrates for the first time that BVDV transmission may occur among white-tailed deer. The birth of a PI fawn through contact to a PI white-tailed deer indicates that under appropriate circumstances, BVDV may be maintained in white-tailed deer by congenital infection. bovine viral diarrhea virus / BVDV transmission / Odocoileus virginianus / persistent infection / white-tailed deer
