Tonie Rocke
Tonie Rocke is a Research Epidemiologist at the National Wildlife Health Center.
Science and Products
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Vaccination as a potential means to prevent plague in black-footed ferrets: Progress and continuing challenges Vaccination as a potential means to prevent plague in black-footed ferrets: Progress and continuing challenges
This study was conducted to further assess the feasibility of vaccinating black-footed ferrets (Mustela nigripes) against plague (caused by the bacterium Yersinia pestis). On days 0 and 28, 17 postreproductive ferrets were immunized by subcutaneous injection with a recombinant fusion protein containing F1 and V antigens from Y. pestis. Another 17 animals received a placebo by the same...
Authors
Tonie E. Rocke, Pauline Nol, Paul E. Marinari, J.S. Kreeger, Susan R. Smith, G.P. Andrews, A.W. Friedlander
Toxicoinfectious botulism in commercial caponized chickens Toxicoinfectious botulism in commercial caponized chickens
During the summer of 2003, two flocks of commercial broiler chickens experienced unusually high death losses following caponizing at 3 wk of age and again between 8 and 14 wk of age. In September, fifteen 11-wk-old live capons were submitted to the Iowa State University Veterinary Diagnostic Laboratory for assistance. In both flocks, the second episode of elevated mortality was...
Authors
D.W. Trampel, Susan Smith, Tonie E. Rocke
Attempts to identify the source of avian vacuolar myelinopathy for waterbirds Attempts to identify the source of avian vacuolar myelinopathy for waterbirds
Attempts were made to reproduce avian vacuolar myelinopathy (AVM) in a number of test animals in order to determine the source of the causative agent for birds and to find a suitable animal model for future studies. Submerged vegetation, plankton, invertebrates, forage fish, and sediments were collected from three lakes with ongoing outbreaks of AVM and fed to American coots (Fulica...
Authors
Tonie E. Rocke, Nancy J. Thomas, Carol U. Meteyer, Charlotte Quist, John R. Fischer, Tom Augspurger, S. E. Ward
The impact of disease in the American white pelican in North America The impact of disease in the American white pelican in North America
Records of reported die-offs of the American White Pelican (Pelicanus erythrorhynchos) held by the U.S. Geological Survey National Wildlife Health Center from 1978 through 2003 indicate that type C botulism (caused by Clostridium botulinum) was the major cause of mortality. In 1996, over 15,000 birds, including 8,500 American White Pelicans, were estimated to have died from type C...
Authors
Tonie E. Rocke, Kathryn A. Converse, Carol U. Meteyer, R. McLean
Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapis (Oreochromis mossambicus) in the Salton Sea Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapis (Oreochromis mossambicus) in the Salton Sea
Tilapia (Oreochromis mossambicus) have been implicated as the source of type C toxin in avian botulism outbreaks in pelicans (Pelecanus erythrorhynchos, Pelecanus occidentalis californicus) at the Salton Sea in southern California (USA). We collected sick, dead, and healthy fish from various sites throughout the Sea during the summers of 1999 through 2001 and tested them for the presence...
Authors
P.J. Nol, Tonie E. Rocke, K. Gross, Thomas M. Yuill
Type C botulism in pelicans and other fish-eating birds at the Salton Sea Type C botulism in pelicans and other fish-eating birds at the Salton Sea
In 1996, type C avian botulism killed over 10,000 pelicans and nearly 10,000 other fish-eating birds at the Salton Sea in southern California. Although botulism had been previously documented in waterbirds at the Sea, this die-off was unusual in that it involved primarily fish-eating birds. The American White Pelican (Pelecanus erythrorynchos) was the species with the greatest mortality...
Authors
Tonie E. Rocke, Pauline Nol, C. Pelizza, K. K. Sturm
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 134
Vaccination as a potential means to prevent plague in black-footed ferrets: Progress and continuing challenges Vaccination as a potential means to prevent plague in black-footed ferrets: Progress and continuing challenges
This study was conducted to further assess the feasibility of vaccinating black-footed ferrets (Mustela nigripes) against plague (caused by the bacterium Yersinia pestis). On days 0 and 28, 17 postreproductive ferrets were immunized by subcutaneous injection with a recombinant fusion protein containing F1 and V antigens from Y. pestis. Another 17 animals received a placebo by the same...
Authors
Tonie E. Rocke, Pauline Nol, Paul E. Marinari, J.S. Kreeger, Susan R. Smith, G.P. Andrews, A.W. Friedlander
Toxicoinfectious botulism in commercial caponized chickens Toxicoinfectious botulism in commercial caponized chickens
During the summer of 2003, two flocks of commercial broiler chickens experienced unusually high death losses following caponizing at 3 wk of age and again between 8 and 14 wk of age. In September, fifteen 11-wk-old live capons were submitted to the Iowa State University Veterinary Diagnostic Laboratory for assistance. In both flocks, the second episode of elevated mortality was...
Authors
D.W. Trampel, Susan Smith, Tonie E. Rocke
Attempts to identify the source of avian vacuolar myelinopathy for waterbirds Attempts to identify the source of avian vacuolar myelinopathy for waterbirds
Attempts were made to reproduce avian vacuolar myelinopathy (AVM) in a number of test animals in order to determine the source of the causative agent for birds and to find a suitable animal model for future studies. Submerged vegetation, plankton, invertebrates, forage fish, and sediments were collected from three lakes with ongoing outbreaks of AVM and fed to American coots (Fulica...
Authors
Tonie E. Rocke, Nancy J. Thomas, Carol U. Meteyer, Charlotte Quist, John R. Fischer, Tom Augspurger, S. E. Ward
The impact of disease in the American white pelican in North America The impact of disease in the American white pelican in North America
Records of reported die-offs of the American White Pelican (Pelicanus erythrorhynchos) held by the U.S. Geological Survey National Wildlife Health Center from 1978 through 2003 indicate that type C botulism (caused by Clostridium botulinum) was the major cause of mortality. In 1996, over 15,000 birds, including 8,500 American White Pelicans, were estimated to have died from type C...
Authors
Tonie E. Rocke, Kathryn A. Converse, Carol U. Meteyer, R. McLean
Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapis (Oreochromis mossambicus) in the Salton Sea Prevalence of neurotoxic Clostridium botulinum type C in the gastrointestinal tracts of tilapis (Oreochromis mossambicus) in the Salton Sea
Tilapia (Oreochromis mossambicus) have been implicated as the source of type C toxin in avian botulism outbreaks in pelicans (Pelecanus erythrorhynchos, Pelecanus occidentalis californicus) at the Salton Sea in southern California (USA). We collected sick, dead, and healthy fish from various sites throughout the Sea during the summers of 1999 through 2001 and tested them for the presence...
Authors
P.J. Nol, Tonie E. Rocke, K. Gross, Thomas M. Yuill
Type C botulism in pelicans and other fish-eating birds at the Salton Sea Type C botulism in pelicans and other fish-eating birds at the Salton Sea
In 1996, type C avian botulism killed over 10,000 pelicans and nearly 10,000 other fish-eating birds at the Salton Sea in southern California. Although botulism had been previously documented in waterbirds at the Sea, this die-off was unusual in that it involved primarily fish-eating birds. The American White Pelican (Pelecanus erythrorynchos) was the species with the greatest mortality...
Authors
Tonie E. Rocke, Pauline Nol, C. Pelizza, K. K. Sturm