David A Eads, PhD (Former Employee)
Science and Products
Filter Total Items: 28
Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in South Dakota, USA, 2014-2015 Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in South Dakota, USA, 2014-2015
Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in Conata Basin, Buffalo Gap National Grassland and Badlands National Park, South Dakota, 2014-2015. Two data files are available, one from "Mortality trials" and another from "recovery trials". The data from "Mortality trials" includes information on bioassays in which fleas were subjected to...
Data on Flea Parasitism and Annual Re-encounters of Utah Prairie Dogs at 5 colonies on the Awapa Plateau, Utah, USA, 2013-2016 Data on Flea Parasitism and Annual Re-encounters of Utah Prairie Dogs at 5 colonies on the Awapa Plateau, Utah, USA, 2013-2016
Data on flea parasitism and annual re-encounters of Utah prairie dogs at 5 colonies on the Awapa Plateau, Utah, USA, June-August 2013-2016. Utah prairie dogs were live-trapped and sampled on 5 colonies along an elevation gradient from 2,645 m to 2,873 m. Upon first capture each year, we anesthetized each prairie dog and fleas on its body and combed the prairie dog as thoroughly as...
Grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006 Grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006
Data on factors that affect the grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006. Each line of data presents information for a focal observation of a single black-tailed prairie dog. The data includes information on the date of each observation, the approximate coordinates of sites, the time of each observation, indexed wind speed, indexed temperature...
Occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado, 1982-2005 Occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado, 1982-2005
Data on the occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado 1982-2005. Data are derived from annual prairie dog surveys conducted by staff of the Pawnee National Grassland, U.S. Forest Service. The data includes information on the year of sampling, colony identification, UTM coordinates of colony centroids, weather...
Filter Total Items: 38
Epizootic plague in prairie dogs: Correlates and control with deltamethrin Epizootic plague in prairie dogs: Correlates and control with deltamethrin
The plague bacterium, Yersinia pestis, is a generalist pathogen of flea (Siphonaptera) vectors and mammalian hosts. In colonies of prairie dogs (PDs, Cynomys spp.), Y. pestis causes occasional epizootics, killing ≥90% of PDs within weeks to several months. We evaluated the effectiveness of deltamethrin, a pyrethroid insecticide, as a tool for preventing plague epizootics among three PD...
Authors
Dean Biggins, Jerry Godbey, David Eads
Ecology and management of plague in diverse communities of rodents and fleas Ecology and management of plague in diverse communities of rodents and fleas
Plague originated in Asia as a flea-borne zoonosis of mammalian hosts. Today, the disease is distributed nearly worldwide. In western United States of America, plague is maintained, transmitted, and amplified in diverse communities of rodents and fleas. We examined flea diversity on three species of prairie dogs (Cynomys spp., PDs) and six species of sympatric small rodents in Montana...
Authors
David Eads, Dean Biggins, Kenneth L. Gage
Managing plague on prairie dog colonies: Insecticides as ectoparasiticides Managing plague on prairie dog colonies: Insecticides as ectoparasiticides
Human health practitioners and wildlife biologists use insecticides to manage plague by suppressing fleas (Siphonaptera), but insecticides can also kill other ectoparasites. We investigated effects of deltamethrin and fipronil on ectoparasites from black-tailed prairie dogs (Cynomys ludovicianus, BTPDs). In late July, 2018, we treated three sites with 0.05% deltamethrin dust and 5 sites...
Authors
David Eads, Alexis Yashin, Lauren Nobel, Michele Vasquez, Miranda Huang, Travis Livieri, Phillip Dobesh, Eddie Childers, Dean Biggins
Flea parasitism and host survival in a plague-relevant system: Theoretical and conservation implications Flea parasitism and host survival in a plague-relevant system: Theoretical and conservation implications
Plague is a bacterial zoonosis of mammalian hosts and flea vectors. The disease is capable of ravaging rodent populations and transforming ecosystems. Because plague mortality is likely to be predicted by flea parasitism, it is critical to understand vector dynamics. It has been hypothesized that paltry precipitation and reduced vegetative production predispose herbivorous rodents to
Authors
David Eads, Rachel Abbott, Dean Biggins, Tonie Rocke
Evaluation of five pulicides to suppress fleas on black-tailed prairie dogs: Encouraging long-term results with systemic 0.005% fipronil Evaluation of five pulicides to suppress fleas on black-tailed prairie dogs: Encouraging long-term results with systemic 0.005% fipronil
Plague, a flea-borne disease, hampers efforts to restore populations of black-footed ferrets (Mustela nigripes), which occupy colonies of prairie dogs (Cynomys spp.) in North America. Plague is managed by infusing prairie dog burrows with DeltaDust® 0.05% deltamethrin, a pulicide that kills fleas. Experiments are needed to identify pulicides that can be used in rotation with DeltaDust...
Authors
David Eads, Dean Biggins, Kristina Broerman, Jonathan Bowser, Travis Livieri, Eddie Childers, Phillip Dobesh, Randall Griebel
Plague management of prairie dog colonies: Degree and duration of deltamethrin flea control Plague management of prairie dog colonies: Degree and duration of deltamethrin flea control
Plague is a flea-borne disease of mammalian hosts. On the grasslands of western North America, plague stifles populations of Cynomys spp. prairie dogs (PDs). To manage plague, PD burrows are treated with 0.05% deltamethrin dust that can suppress flea numbers and plague transmission. Here, we evaluate the degree and duration of deltamethrin flea control with three PD species at six sites...
Authors
David Eads, Dean Biggins
Resistance to deltamethrin in prairie dog (Cynomys ludovicianus) fleas in the field and in the laboratory Resistance to deltamethrin in prairie dog (Cynomys ludovicianus) fleas in the field and in the laboratory
Sylvatic plague poses a substantial risk to black-tailed prairie dogs (Cynomys ludovicianus) and their obligate predator, the black-footed ferret (Mustela nigripes). The effects of plague on prairie dogs and ferrets are mitigated using a deltamethrin pulicide dust that reduces the spread of plague by killing fleas, the vector for the plague bacterium. In portions of Conata Basin, Buffalo...
Authors
David Eads, Dean Biggins, Jonathan Bowser, Janet McAllister, Randall Griebel, Eddie Childers, Travis Livieri, Cristi Painter, Lindsey Sterling Krank, Kristy Bly
Evolution, natural history, and conservation of black-footed ferrets Evolution, natural history, and conservation of black-footed ferrets
No abstract available.
Authors
Dean Biggins, David Eads
Grooming behaviors of black-tailed prairie dogs are influenced by flea parasitism, conspecifics, and proximity to refuge Grooming behaviors of black-tailed prairie dogs are influenced by flea parasitism, conspecifics, and proximity to refuge
Grooming is a common animal behavior that aids in ectoparasite defense. Ectoparasites can stimulate grooming, and natural selection can also favor endogenous mechanisms that evoke periodic bouts of “programmed” grooming to dislodge or kill ectoparasites before they bite or feed. Moreover, grooming can function as a displacement or communication behavior. We compared the grooming...
Authors
David Eads, Dean Biggins, Samantha Eads
Plague cycles in two rodent species from China: Dry years might provide context for epizootics in wet years Plague cycles in two rodent species from China: Dry years might provide context for epizootics in wet years
Plague, a rodent-associated, flea-borne zoonosis, is one of the most notorious diseases in history. Rates of plague transmission can increase when fleas are abundant. Fleas commonly desiccate and die when reared under dry conditions in laboratories, suggesting fleas will be suppressed during droughts in the wild, thus reducing the rate at which plague spreads among hosts. In contrast...
Authors
David Eads, Dean Biggins, Lei Xu, Qiyong Liu
Droughts may increase susceptibility of prairie dogs to fleas: Incongruity with hypothesized mechanisms of plague cycles in rodents Droughts may increase susceptibility of prairie dogs to fleas: Incongruity with hypothesized mechanisms of plague cycles in rodents
Plague is a reemerging, rodent-associated zoonosis caused by the flea-borne bacterium Yersinia pestis. As a vector-borne disease, rates of plague transmission may increase when fleas are abundant. Fleas are highly susceptible to desiccation under hot-dry conditions; we posited that their densities decline during droughts. We evaluated this hypothesis with black-tailed prairie dogs...
Authors
David Eads, Dean Biggins, Dustin Long, Kenneth Gage, Michael Antolin
Factors that affect parasitism of black-tailed prairie dogs by fleas Factors that affect parasitism of black-tailed prairie dogs by fleas
Fleas (Insecta: Siphonaptera) are hematophagous ectoparasites that feed on vertebrate hosts. Fleas can reduce the fitness of hosts by interfering with immune responses, disrupting adaptive behaviors, and transmitting pathogens. The negative effects of fleas on hosts are usually most pronounced when fleas attain high densities. In lab studies, fleas desiccate and die under dry conditions
Authors
David Eads, John L. Hoogland
Science and Products
Filter Total Items: 28
Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in South Dakota, USA, 2014-2015 Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in South Dakota, USA, 2014-2015
Data on deltamethrin resistance in Oropsylla hirsuta fleas from black-tailed prairie dogs in Conata Basin, Buffalo Gap National Grassland and Badlands National Park, South Dakota, 2014-2015. Two data files are available, one from "Mortality trials" and another from "recovery trials". The data from "Mortality trials" includes information on bioassays in which fleas were subjected to...
Data on Flea Parasitism and Annual Re-encounters of Utah Prairie Dogs at 5 colonies on the Awapa Plateau, Utah, USA, 2013-2016 Data on Flea Parasitism and Annual Re-encounters of Utah Prairie Dogs at 5 colonies on the Awapa Plateau, Utah, USA, 2013-2016
Data on flea parasitism and annual re-encounters of Utah prairie dogs at 5 colonies on the Awapa Plateau, Utah, USA, June-August 2013-2016. Utah prairie dogs were live-trapped and sampled on 5 colonies along an elevation gradient from 2,645 m to 2,873 m. Upon first capture each year, we anesthetized each prairie dog and fleas on its body and combed the prairie dog as thoroughly as...
Grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006 Grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006
Data on factors that affect the grooming behaviors of black-tailed prairie dogs in Phillips County, Montana, 2006. Each line of data presents information for a focal observation of a single black-tailed prairie dog. The data includes information on the date of each observation, the approximate coordinates of sites, the time of each observation, indexed wind speed, indexed temperature...
Occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado, 1982-2005 Occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado, 1982-2005
Data on the occurrence of plague epizootics in colonies of black-tailed prairie dogs, Pawnee National Grassland, Colorado 1982-2005. Data are derived from annual prairie dog surveys conducted by staff of the Pawnee National Grassland, U.S. Forest Service. The data includes information on the year of sampling, colony identification, UTM coordinates of colony centroids, weather...
Filter Total Items: 38
Epizootic plague in prairie dogs: Correlates and control with deltamethrin Epizootic plague in prairie dogs: Correlates and control with deltamethrin
The plague bacterium, Yersinia pestis, is a generalist pathogen of flea (Siphonaptera) vectors and mammalian hosts. In colonies of prairie dogs (PDs, Cynomys spp.), Y. pestis causes occasional epizootics, killing ≥90% of PDs within weeks to several months. We evaluated the effectiveness of deltamethrin, a pyrethroid insecticide, as a tool for preventing plague epizootics among three PD...
Authors
Dean Biggins, Jerry Godbey, David Eads
Ecology and management of plague in diverse communities of rodents and fleas Ecology and management of plague in diverse communities of rodents and fleas
Plague originated in Asia as a flea-borne zoonosis of mammalian hosts. Today, the disease is distributed nearly worldwide. In western United States of America, plague is maintained, transmitted, and amplified in diverse communities of rodents and fleas. We examined flea diversity on three species of prairie dogs (Cynomys spp., PDs) and six species of sympatric small rodents in Montana...
Authors
David Eads, Dean Biggins, Kenneth L. Gage
Managing plague on prairie dog colonies: Insecticides as ectoparasiticides Managing plague on prairie dog colonies: Insecticides as ectoparasiticides
Human health practitioners and wildlife biologists use insecticides to manage plague by suppressing fleas (Siphonaptera), but insecticides can also kill other ectoparasites. We investigated effects of deltamethrin and fipronil on ectoparasites from black-tailed prairie dogs (Cynomys ludovicianus, BTPDs). In late July, 2018, we treated three sites with 0.05% deltamethrin dust and 5 sites...
Authors
David Eads, Alexis Yashin, Lauren Nobel, Michele Vasquez, Miranda Huang, Travis Livieri, Phillip Dobesh, Eddie Childers, Dean Biggins
Flea parasitism and host survival in a plague-relevant system: Theoretical and conservation implications Flea parasitism and host survival in a plague-relevant system: Theoretical and conservation implications
Plague is a bacterial zoonosis of mammalian hosts and flea vectors. The disease is capable of ravaging rodent populations and transforming ecosystems. Because plague mortality is likely to be predicted by flea parasitism, it is critical to understand vector dynamics. It has been hypothesized that paltry precipitation and reduced vegetative production predispose herbivorous rodents to
Authors
David Eads, Rachel Abbott, Dean Biggins, Tonie Rocke
Evaluation of five pulicides to suppress fleas on black-tailed prairie dogs: Encouraging long-term results with systemic 0.005% fipronil Evaluation of five pulicides to suppress fleas on black-tailed prairie dogs: Encouraging long-term results with systemic 0.005% fipronil
Plague, a flea-borne disease, hampers efforts to restore populations of black-footed ferrets (Mustela nigripes), which occupy colonies of prairie dogs (Cynomys spp.) in North America. Plague is managed by infusing prairie dog burrows with DeltaDust® 0.05% deltamethrin, a pulicide that kills fleas. Experiments are needed to identify pulicides that can be used in rotation with DeltaDust...
Authors
David Eads, Dean Biggins, Kristina Broerman, Jonathan Bowser, Travis Livieri, Eddie Childers, Phillip Dobesh, Randall Griebel
Plague management of prairie dog colonies: Degree and duration of deltamethrin flea control Plague management of prairie dog colonies: Degree and duration of deltamethrin flea control
Plague is a flea-borne disease of mammalian hosts. On the grasslands of western North America, plague stifles populations of Cynomys spp. prairie dogs (PDs). To manage plague, PD burrows are treated with 0.05% deltamethrin dust that can suppress flea numbers and plague transmission. Here, we evaluate the degree and duration of deltamethrin flea control with three PD species at six sites...
Authors
David Eads, Dean Biggins
Resistance to deltamethrin in prairie dog (Cynomys ludovicianus) fleas in the field and in the laboratory Resistance to deltamethrin in prairie dog (Cynomys ludovicianus) fleas in the field and in the laboratory
Sylvatic plague poses a substantial risk to black-tailed prairie dogs (Cynomys ludovicianus) and their obligate predator, the black-footed ferret (Mustela nigripes). The effects of plague on prairie dogs and ferrets are mitigated using a deltamethrin pulicide dust that reduces the spread of plague by killing fleas, the vector for the plague bacterium. In portions of Conata Basin, Buffalo...
Authors
David Eads, Dean Biggins, Jonathan Bowser, Janet McAllister, Randall Griebel, Eddie Childers, Travis Livieri, Cristi Painter, Lindsey Sterling Krank, Kristy Bly
Evolution, natural history, and conservation of black-footed ferrets Evolution, natural history, and conservation of black-footed ferrets
No abstract available.
Authors
Dean Biggins, David Eads
Grooming behaviors of black-tailed prairie dogs are influenced by flea parasitism, conspecifics, and proximity to refuge Grooming behaviors of black-tailed prairie dogs are influenced by flea parasitism, conspecifics, and proximity to refuge
Grooming is a common animal behavior that aids in ectoparasite defense. Ectoparasites can stimulate grooming, and natural selection can also favor endogenous mechanisms that evoke periodic bouts of “programmed” grooming to dislodge or kill ectoparasites before they bite or feed. Moreover, grooming can function as a displacement or communication behavior. We compared the grooming...
Authors
David Eads, Dean Biggins, Samantha Eads
Plague cycles in two rodent species from China: Dry years might provide context for epizootics in wet years Plague cycles in two rodent species from China: Dry years might provide context for epizootics in wet years
Plague, a rodent-associated, flea-borne zoonosis, is one of the most notorious diseases in history. Rates of plague transmission can increase when fleas are abundant. Fleas commonly desiccate and die when reared under dry conditions in laboratories, suggesting fleas will be suppressed during droughts in the wild, thus reducing the rate at which plague spreads among hosts. In contrast...
Authors
David Eads, Dean Biggins, Lei Xu, Qiyong Liu
Droughts may increase susceptibility of prairie dogs to fleas: Incongruity with hypothesized mechanisms of plague cycles in rodents Droughts may increase susceptibility of prairie dogs to fleas: Incongruity with hypothesized mechanisms of plague cycles in rodents
Plague is a reemerging, rodent-associated zoonosis caused by the flea-borne bacterium Yersinia pestis. As a vector-borne disease, rates of plague transmission may increase when fleas are abundant. Fleas are highly susceptible to desiccation under hot-dry conditions; we posited that their densities decline during droughts. We evaluated this hypothesis with black-tailed prairie dogs...
Authors
David Eads, Dean Biggins, Dustin Long, Kenneth Gage, Michael Antolin
Factors that affect parasitism of black-tailed prairie dogs by fleas Factors that affect parasitism of black-tailed prairie dogs by fleas
Fleas (Insecta: Siphonaptera) are hematophagous ectoparasites that feed on vertebrate hosts. Fleas can reduce the fitness of hosts by interfering with immune responses, disrupting adaptive behaviors, and transmitting pathogens. The negative effects of fleas on hosts are usually most pronounced when fleas attain high densities. In lab studies, fleas desiccate and die under dry conditions
Authors
David Eads, John L. Hoogland