Tonie Rocke
Tonie Rocke is a Research Epidemiologist at the National Wildlife Health Center.
Science and Products
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The role of avian carcasses in botulism epizootics The role of avian carcasses in botulism epizootics
No abstract available.
Authors
T.M. Reed, Tonie E. Rocke
Brain acetycholinesterase activity in botulism-intoxicated mallards Brain acetycholinesterase activity in botulism-intoxicated mallards
Brain acetylcholinesterase (AChE) activity in captive-reared mallards (Anas platyrhynchos) that died of botulism was compared with euthanized controls. AChE levels for both groups were within the range reported for normal mallards, and there was no significant difference in mean AChE activity between birds that ingested botulism toxin and died and those that did not.
Authors
Tonie E. Rocke, M.D. Samuel
Effects of lead shot ingestion on selected cells of the mallard immune system Effects of lead shot ingestion on selected cells of the mallard immune system
The immunologic effects of lead were measured in game-farm mallards (Anas platyrhynchos) that ingested lead shot while foraging naturally, mallards intubated with lead shot, and unexposed controls. Circulating white blood cells (WBC) declined significantly in male mallards exposed to lead by either natural ingestion or intubation, but not females. Spleen plaque-forming cell (SPFC) counts...
Authors
Tonie E. Rocke, M.D. Samuel
Blood lead concentrations in mallards from Delevan and Colusa National Wildlife Refuges Blood lead concentrations in mallards from Delevan and Colusa National Wildlife Refuges
Blood samples were taken from 181 (108 adult drakes and 73 individuals of mixed age and sex) mallards, Anas platyrhynchos, from Colusa and Delevan National Wildlife Refuges during late winter and summer of 1987. The percentage of birds with elevated lead concentration was 28.7 for late winter and 16.4 for late summer. For summer trapped birds, a significantly greater proportion of males...
Authors
David M. Mauser, Tonie E. Rocke, John G. Mensik, Christopher J. Brand
Experimental Mycoplasma gallisepticum infections in captive-reared wild turkeys Experimental Mycoplasma gallisepticum infections in captive-reared wild turkeys
The effects of Mycoplasma gallisepticum (MG) infections on egg production, fertility, and hatchability were studied in captive-reared wild turkeys (Meleagris gallopavo). Three groups of adult birds, each consisting of four hens and two toms, were exposed to MG by the respiratory route at the beginning of their breeding season. Fourteen control birds received sterile growth medium...
Authors
Tonie E. Rocke, Thomas M. Yuill, Terry E. Amundson
Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA) Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA)
One hundred twenty-three of 300 blood samples (41%) taken from Rio Grande wild turkeys (Meleagris gallopavo intermedia) from three locations in southern Texas (Welder Wildlife Refuge, Chaparrosa Ranch, and Campo Alegre Ranch) and subinoculated into domestic broad-breasted white turkey poults were positive for a Plasmodium (Novyella) sp. Analysis of blood films from 350 turkeys revealed
Authors
Marc D. Castle, Beth A. Christensen, Tonie E. Rocke
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 134
The role of avian carcasses in botulism epizootics The role of avian carcasses in botulism epizootics
No abstract available.
Authors
T.M. Reed, Tonie E. Rocke
Brain acetycholinesterase activity in botulism-intoxicated mallards Brain acetycholinesterase activity in botulism-intoxicated mallards
Brain acetylcholinesterase (AChE) activity in captive-reared mallards (Anas platyrhynchos) that died of botulism was compared with euthanized controls. AChE levels for both groups were within the range reported for normal mallards, and there was no significant difference in mean AChE activity between birds that ingested botulism toxin and died and those that did not.
Authors
Tonie E. Rocke, M.D. Samuel
Effects of lead shot ingestion on selected cells of the mallard immune system Effects of lead shot ingestion on selected cells of the mallard immune system
The immunologic effects of lead were measured in game-farm mallards (Anas platyrhynchos) that ingested lead shot while foraging naturally, mallards intubated with lead shot, and unexposed controls. Circulating white blood cells (WBC) declined significantly in male mallards exposed to lead by either natural ingestion or intubation, but not females. Spleen plaque-forming cell (SPFC) counts...
Authors
Tonie E. Rocke, M.D. Samuel
Blood lead concentrations in mallards from Delevan and Colusa National Wildlife Refuges Blood lead concentrations in mallards from Delevan and Colusa National Wildlife Refuges
Blood samples were taken from 181 (108 adult drakes and 73 individuals of mixed age and sex) mallards, Anas platyrhynchos, from Colusa and Delevan National Wildlife Refuges during late winter and summer of 1987. The percentage of birds with elevated lead concentration was 28.7 for late winter and 16.4 for late summer. For summer trapped birds, a significantly greater proportion of males...
Authors
David M. Mauser, Tonie E. Rocke, John G. Mensik, Christopher J. Brand
Experimental Mycoplasma gallisepticum infections in captive-reared wild turkeys Experimental Mycoplasma gallisepticum infections in captive-reared wild turkeys
The effects of Mycoplasma gallisepticum (MG) infections on egg production, fertility, and hatchability were studied in captive-reared wild turkeys (Meleagris gallopavo). Three groups of adult birds, each consisting of four hens and two toms, were exposed to MG by the respiratory route at the beginning of their breeding season. Fourteen control birds received sterile growth medium...
Authors
Tonie E. Rocke, Thomas M. Yuill, Terry E. Amundson
Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA) Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA)
One hundred twenty-three of 300 blood samples (41%) taken from Rio Grande wild turkeys (Meleagris gallopavo intermedia) from three locations in southern Texas (Welder Wildlife Refuge, Chaparrosa Ranch, and Campo Alegre Ranch) and subinoculated into domestic broad-breasted white turkey poults were positive for a Plasmodium (Novyella) sp. Analysis of blood films from 350 turkeys revealed
Authors
Marc D. Castle, Beth A. Christensen, Tonie E. Rocke