Tonie Rocke
Tonie Rocke is a Research Epidemiologist at the National Wildlife Health Center.
Science and Products
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Preliminary evaluation of a simple in vitro test for the diagnosis of type C botulism in wild birds Preliminary evaluation of a simple in vitro test for the diagnosis of type C botulism in wild birds
An enzyme-linked immunosorbent assay (ELISA) was developed for the detection of type C botulinum toxin (Clostridium botulinum) in wild birds. This simple, antigen-capture ELISA utilizes polystyrene immunosticks as the solid substrate, chicken antitoxin (IgY) as the coating antibody, rabbit antitoxin as the primary antibody, and peroxidase-labeled goat-anti-rabbit as the secondary...
Authors
Tonie E. Rocke, Susan Smith, Sean Nashold
The inhibition of Clostridium botulinum type C by other bacteria in wetland sediments The inhibition of Clostridium botulinum type C by other bacteria in wetland sediments
Bacteria with inhibitory activity against Clostridium botulinum type C were isolated from 32% of sediment samples (n = 1600) collected from 10 marshes in a northern California wetland over a 12 mo period. Aerobic and anaerobic bacteria with inhibitory activity were isolated from 12% and 23% of the samples, respectively. Bacteria with inhibitory activity were isolated from all 10 study...
Authors
Renee J. Sandler, Tonie E. Rocke, Thomas M. Yuill
Site-specific lead exposure from lead pellet ingestion in sentinel mallards Site-specific lead exposure from lead pellet ingestion in sentinel mallards
We monitored lead poisoning from the ingestion of spent lead pellets in sentinel mallards (Anas platyhrynchos) at the Sacramento National Wildlife Refuge (SNWR), Willows, California for 4 years (1986-89) after the conversion to steel shot for waterfowl hunting on refuges in 1986. Sentinel mallards were held in 1.6-ha enclosures in 1 hunted (P8) and 2 non-hunted (T19 and TF) wetlands. We...
Authors
Tonie E. Rocke, C. J. Brand, John G. Mensik
Use of sentinel mallards for epizootiologic studies of avian botulism Use of sentinel mallards for epizootiologic studies of avian botulism
Captive-reared mallards (Anas platyrhynchos) were used as sentinels to study the epizootiology of avian botulism at the Sacramento National Wildlife Refuge, Willows, California (USA) from 1986 to 1989. Sentinel mallards were wing-clipped, and 40 to 50 birds were confined in 1.6-ha enclosures in 11 selected wetlands (pools). Enclosures were searched intensively three to four times weekly...
Authors
Tonie E. Rocke, C. J. Brand
Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland
The prevalence of Clostridium botulinum type C (% of positive sediment samples) was determined in 10 marshes at Sacramento National Wildlife Refuge (SNWR), located in the Central Valley of California (USA), where avian botulism epizootics occur regularly. Fifty-two percent of 2,200 sediment samples collected over an 18-mo period contained C. botulinum type C (both neurotoxic and...
Authors
Renee J. Sandler, Tonie E. Rocke, M.D. Samuel, Thomas M. Yuill
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 134
Preliminary evaluation of a simple in vitro test for the diagnosis of type C botulism in wild birds Preliminary evaluation of a simple in vitro test for the diagnosis of type C botulism in wild birds
An enzyme-linked immunosorbent assay (ELISA) was developed for the detection of type C botulinum toxin (Clostridium botulinum) in wild birds. This simple, antigen-capture ELISA utilizes polystyrene immunosticks as the solid substrate, chicken antitoxin (IgY) as the coating antibody, rabbit antitoxin as the primary antibody, and peroxidase-labeled goat-anti-rabbit as the secondary...
Authors
Tonie E. Rocke, Susan Smith, Sean Nashold
The inhibition of Clostridium botulinum type C by other bacteria in wetland sediments The inhibition of Clostridium botulinum type C by other bacteria in wetland sediments
Bacteria with inhibitory activity against Clostridium botulinum type C were isolated from 32% of sediment samples (n = 1600) collected from 10 marshes in a northern California wetland over a 12 mo period. Aerobic and anaerobic bacteria with inhibitory activity were isolated from 12% and 23% of the samples, respectively. Bacteria with inhibitory activity were isolated from all 10 study...
Authors
Renee J. Sandler, Tonie E. Rocke, Thomas M. Yuill
Site-specific lead exposure from lead pellet ingestion in sentinel mallards Site-specific lead exposure from lead pellet ingestion in sentinel mallards
We monitored lead poisoning from the ingestion of spent lead pellets in sentinel mallards (Anas platyhrynchos) at the Sacramento National Wildlife Refuge (SNWR), Willows, California for 4 years (1986-89) after the conversion to steel shot for waterfowl hunting on refuges in 1986. Sentinel mallards were held in 1.6-ha enclosures in 1 hunted (P8) and 2 non-hunted (T19 and TF) wetlands. We...
Authors
Tonie E. Rocke, C. J. Brand, John G. Mensik
Use of sentinel mallards for epizootiologic studies of avian botulism Use of sentinel mallards for epizootiologic studies of avian botulism
Captive-reared mallards (Anas platyrhynchos) were used as sentinels to study the epizootiology of avian botulism at the Sacramento National Wildlife Refuge, Willows, California (USA) from 1986 to 1989. Sentinel mallards were wing-clipped, and 40 to 50 birds were confined in 1.6-ha enclosures in 11 selected wetlands (pools). Enclosures were searched intensively three to four times weekly...
Authors
Tonie E. Rocke, C. J. Brand
Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland Seasonal prevalence of Clostridium botulinum type C in the sediments of the northern California wetland
The prevalence of Clostridium botulinum type C (% of positive sediment samples) was determined in 10 marshes at Sacramento National Wildlife Refuge (SNWR), located in the Central Valley of California (USA), where avian botulism epizootics occur regularly. Fifty-two percent of 2,200 sediment samples collected over an 18-mo period contained C. botulinum type C (both neurotoxic and...
Authors
Renee J. Sandler, Tonie E. Rocke, M.D. Samuel, Thomas M. Yuill