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  1. Article ; Online: BOARD INVITED REVIEW: Prospects for improving management of animal disease introductions using disease-dynamic models.

    Miller, Ryan S / Pepin, Kim M

    Journal of animal science

    2019  Volume 97, Issue 6, Page(s) 2291–2307

    Abstract: Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading ...

    Abstract Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading to more effective decisions yet application of models to actively guide disease surveillance and mitigate risks remains limited. Disease-dynamic models are an efficient method of providing information for management decisions because of their ability to integrate and evaluate multiple, complex processes simultaneously while accounting for uncertainty common in animal diseases. Here we review disease introduction pathways and transmission processes crucial for informing disease management and models at the interface of domestic animals and wildlife. We describe how disease transmission models can improve disease management and present a conceptual framework for integrating disease models into the decision process using adaptive management principles. We apply our framework to a case study of African swine fever virus in wild and domestic swine to demonstrate how disease-dynamic models can improve mitigation of introduction risk. We also identify opportunities to improve the application of disease models to support decision-making to manage disease at the interface of domestic and wild animals. First, scientists must focus on objective-driven models providing practical predictions that are useful to those managing disease. In order for practical model predictions to be incorporated into disease management a recognition that modeling is a means to improve management and outcomes is important. This will be most successful when done in a cross-disciplinary environment that includes scientists and decision-makers representing wildlife and domestic animal health. Lastly, including economic principles of value-of-information and cost-benefit analysis in disease-dynamic models can facilitate more efficient management decisions and improve communication of model forecasts. Integration of disease-dynamic models into management and decision-making processes is expected to improve surveillance systems, risk mitigations, outbreak preparedness, and outbreak response activities.
    MeSH term(s) African Swine Fever/epidemiology ; African Swine Fever/prevention & control ; African Swine Fever/transmission ; African Swine Fever/virology ; Agriculture ; Animal Diseases/epidemiology ; Animal Diseases/prevention & control ; Animal Diseases/transmission ; Animal Diseases/virology ; Animals ; Animals, Domestic ; Animals, Wild ; Decision Making ; Disease Outbreaks/veterinary ; Disease Reservoirs/veterinary ; Epidemiological Monitoring ; Models, Statistical ; Risk Assessment ; Swine
    Language English
    Publishing date 2019-04-11
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 390959-1
    ISSN 1525-3163 ; 0021-8812
    ISSN (online) 1525-3163
    ISSN 0021-8812
    DOI 10.1093/jas/skz125
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A framework for surveillance of emerging pathogens at the human-animal interface: Pigs and coronaviruses as a case study.

    Pepin, Kim M / Miller, Ryan S / Wilber, Mark Q

    Preventive veterinary medicine

    2021  Volume 188, Page(s) 105281

    Abstract: Pigs (Sus scrofa) may be important surveillance targets for risk assessment and risk-based control planning against emerging zoonoses. Pigs have high contact rates with humans and other animals, transmit similar pathogens as humans including CoVs, and ... ...

    Abstract Pigs (Sus scrofa) may be important surveillance targets for risk assessment and risk-based control planning against emerging zoonoses. Pigs have high contact rates with humans and other animals, transmit similar pathogens as humans including CoVs, and serve as reservoirs and intermediate hosts for notable human pandemics. Wild and domestic pigs both interface with humans and each other but have unique ecologies that demand different surveillance strategies. Three fundamental questions shape any surveillance program: where, when, and how can surveillance be conducted to optimize the surveillance objective? Using theory of mechanisms of zoonotic spillover and data on risk factors, we propose a framework for determining where surveillance might begin initially to maximize a detection in each host species at their interface. We illustrate the utility of the framework using data from the United States. We then discuss variables to consider in refining when and how to conduct surveillance. Recent advances in accounting for opportunistic sampling designs and in translating serology samples into infection times provide promising directions for extracting spatio-temporal estimates of disease risk from typical surveillance data. Such robust estimates of population-level disease risk allow surveillance plans to be updated in space and time based on new information (adaptive surveillance) thus optimizing allocation of surveillance resources to maximize the quality of risk assessment insight.
    MeSH term(s) Animals ; Animals, Wild/virology ; Communicable Diseases, Emerging/epidemiology ; Coronavirus/isolation & purification ; Coronavirus Infections/epidemiology ; Coronavirus Infections/veterinary ; Disease Reservoirs/virology ; Humans ; Public Health Surveillance/methods ; Sus scrofa/virology ; Swine/virology ; Swine Diseases/epidemiology ; Swine Diseases/virology ; Zoonoses/epidemiology ; Zoonoses/transmission
    Language English
    Publishing date 2021-01-27
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 43399-8
    ISSN 1873-1716 ; 0167-5877
    ISSN (online) 1873-1716
    ISSN 0167-5877
    DOI 10.1016/j.prevetmed.2021.105281
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Case 2: Fatigue and Shortness of Breath in an 18-year-old Girl.

    Lee, Jessica / Miller, Ryan S

    Pediatrics in review

    2018  Volume 39, Issue 12, Page(s) 614–616

    MeSH term(s) Adolescent ; Anemia, Iron-Deficiency/complications ; Anemia, Iron-Deficiency/therapy ; Dyspnea/etiology ; Fatigue/etiology ; Female ; Humans ; Hypothyroidism/complications ; Hypothyroidism/diagnosis ; Hypothyroidism/drug therapy ; Thyroid Function Tests/methods ; Thyroxine/therapeutic use
    Chemical Substances Thyroxine (Q51BO43MG4)
    Language English
    Publishing date 2018-11-30
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 774515-1
    ISSN 1526-3347 ; 0191-9601
    ISSN (online) 1526-3347
    ISSN 0191-9601
    DOI 10.1542/pir.2017-0288
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Individual-level patterns of resource selection do not predict hotspots of contact.

    Yang, Anni / Boughton, Raoul / Miller, Ryan S / Snow, Nathan P / Vercauteren, Kurt C / Pepin, Kim M / Wittemyer, George

    Movement ecology

    2023  Volume 11, Issue 1, Page(s) 74

    Abstract: Contact among animals is crucial for various ecological processes, including social behaviors, disease transmission, and predator-prey interactions. However, the distribution of contact events across time and space is heterogeneous, influenced by ... ...

    Abstract Contact among animals is crucial for various ecological processes, including social behaviors, disease transmission, and predator-prey interactions. However, the distribution of contact events across time and space is heterogeneous, influenced by environmental factors and biological purposes. Previous studies have assumed that areas with abundant resources and preferred habitats attract more individuals and, therefore, lead to more contact. To examine the accuracy of this assumption, we used a use-available framework to compare landscape factors influencing the location of contacts between wild pigs (Sus scrofa) in two study areas in Florida and Texas (USA) from those influencing non-contact space use. We employed a contact-resource selection function (RSF) model, where contact locations were defined as used points and locations without contact as available points. By comparing outputs from this contact RSF with a general, population-level RSF, we assessed the factors driving both habitat selection and contact. We found that the landscape predictors (e.g., wetland, linear features, and food resources) played different roles in habitat selection from contact processes for wild pigs in both study areas. This indicated that pigs interacted with their landscapes differently when choosing habitats compared to when they encountered other individuals. Consequently, relying solely on the spatial overlap of individual or population-level RSF models may lead to a misleading understanding of contact-related ecology. Our findings challenge prevailing assumptions about contact and introduce innovative approaches to better understand the ecological drivers of spatially explicit contact. By accurately predicting the spatial distribution of contact events, we can enhance our understanding of contact based ecological processes and their spatial dynamics.
    Language English
    Publishing date 2023-11-30
    Publishing country England
    Document type Journal Article
    ZDB-ID 2724975-X
    ISSN 2051-3933
    ISSN 2051-3933
    DOI 10.1186/s40462-023-00435-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Habitat quality influences trade-offs in animal movement along the exploration-exploitation continuum.

    Smith, Joshua B / Keiter, David A / Sweeney, Steven J / Miller, Ryan S / Schlichting, Peter E / Beasley, James C

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 4814

    Abstract: To successfully establish itself in a novel environment, an animal must make an inherent trade-off between knowledge accumulation and exploitation of knowledge gained (i.e., the exploration-exploitation dilemma). To evaluate how habitat quality affects ... ...

    Abstract To successfully establish itself in a novel environment, an animal must make an inherent trade-off between knowledge accumulation and exploitation of knowledge gained (i.e., the exploration-exploitation dilemma). To evaluate how habitat quality affects the spatio-temporal scale of switching between exploration and exploitation during home range establishment, we conducted experimental trials comparing resource selection and space-use of translocated animals to those of reference individuals using reciprocal translocations between habitat types of differing quality. We selected wild pigs (Sus scrofa) as a model species to investigate hypotheses related to the movement behavior of translocated individuals because they are globally distributed large mammals that are often translocated within their introduced range to facilitate recreational hunting. Individuals translocated to higher quality habitat (i.e. higher proportions of bottomland hardwood habitats) exhibited smaller exploratory movements and began exploiting resources more quickly than those introduced to lower quality areas, although those in lower-quality areas demonstrated an increased rate of selection for preferred habitat as they gained knowledge of the landscape. Our data demonstrate that habitat quality mediates the spatial and temporal scale at which animals respond behaviorally to novel environments, and how these processes may determine the success of population establishment.
    MeSH term(s) Animals ; Ecosystem ; Homing Behavior ; Deer ; Movement
    Language English
    Publishing date 2023-03-24
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-31457-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Role of social structure in establishment of an invasive large mammal after translocation.

    Clontz, Lindsay M / Yang, Anni / Chinn, Sarah M / Pepin, Kim M / VerCauteren, Kurt C / Wittemyer, George / Miller, Ryan S / Beasley, James C

    Pest management science

    2023  Volume 79, Issue 10, Page(s) 3819–3829

    Abstract: Background: Data on the movement behavior of translocated wild pigs is needed to develop appropriate response strategies for containing and eliminating new source populations following translocation events. We conducted experimental trials to compare ... ...

    Abstract Background: Data on the movement behavior of translocated wild pigs is needed to develop appropriate response strategies for containing and eliminating new source populations following translocation events. We conducted experimental trials to compare the home range establishment and space-use metrics, including the number of days and distance traveled before becoming range residents, for wild pigs translocated with their social group and individually.
    Results: We found wild pigs translocated with their social group made less extensive movements away from the release location and established a stable home range ~5 days faster than those translocated individually. We also examined how habitat quality impacted the home range sizes of translocated wild pigs and found wild pigs maintained larger ranges in areas with higher proportion of low-quality habitat.
    Conclusion: Collectively, our findings suggest translocations of invasive wild pigs have a greater probability of establishing a viable population near the release site when habitat quality is high and when released with members of their social unit compared to individuals moved independent of their social group or to low-quality habitat. However, all wild pigs translocated in our study made extensive movements from their release location, highlighting the potential for single translocation events of either individuals or groups to have far-reaching consequences within a much broader landscape beyond the location where they are released. These results highlight the challenges associated with containing populations in areas where illegal introduction of wild pigs occurs, and the need for rapid response once releases are identified. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
    MeSH term(s) Animals ; Swine ; Sus scrofa/physiology ; Ecosystem ; Homing Behavior ; Movement ; Social Structure
    Language English
    Publishing date 2023-06-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 2001705-4
    ISSN 1526-4998 ; 1526-498X
    ISSN (online) 1526-4998
    ISSN 1526-498X
    DOI 10.1002/ps.7567
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: An exploration of within-herd dynamics of a transboundary livestock disease: A foot and mouth disease case study.

    Beck-Johnson, Lindsay M / Gorsich, Erin E / Hallman, Clayton / Tildesley, Michael J / Miller, Ryan S / Webb, Colleen T

    Epidemics

    2023  Volume 42, Page(s) 100668

    Abstract: Transboundary livestock diseases are a high priority for policy makers because of the serious economic burdens associated with infection. In order to make well informed preparedness and response plans, policy makers often utilize mathematical models to ... ...

    Abstract Transboundary livestock diseases are a high priority for policy makers because of the serious economic burdens associated with infection. In order to make well informed preparedness and response plans, policy makers often utilize mathematical models to understand possible outcomes of different control strategies and outbreak scenarios. Many of these models focus on the transmission between herds and the overall trajectory of the outbreak. While the course of infection within herds has not been the focus of the majority of models, a thorough understanding of within-herd dynamics can provide valuable insight into a disease system by providing information on herd-level biological properties of the infection, which can be used to inform decision making in both endemic and outbreak settings and to inform larger between-herd models. In this study, we develop three stochastic simulation models to study within-herd foot and mouth disease dynamics and the implications of different empirical data-based assumptions about the timing of the onset of infectiousness and clinical signs. We also study the influence of herd size and the proportion of the herd that is initially infected on the outcome of the infection. We find that increasing herd size increases the duration of infectiousness and that the size of the herd plays a more significant role in determining this duration than the number of initially infected cattle in that herd. We also find that the assumptions made regarding the onset of infectiousness and clinical signs, which are based on contradictory empirical findings, can result in the predictions about when infection would be detectable differing by several days. Therefore, the disease progression used to characterize the course of infection in a single bovine host could have significant implications for determining when herds can be detected and subsequently controlled; the timing of which could influence the overall predicted trajectory of outbreaks.
    MeSH term(s) Animals ; Cattle ; Foot-and-Mouth Disease/epidemiology ; Livestock ; Cattle Diseases/epidemiology ; Foot-and-Mouth Disease Virus ; Disease Outbreaks/prevention & control
    Language English
    Publishing date 2023-01-18
    Publishing country Netherlands
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2467993-8
    ISSN 1878-0067 ; 1755-4365
    ISSN (online) 1878-0067
    ISSN 1755-4365
    DOI 10.1016/j.epidem.2023.100668
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Prospects for improving management of animal disease introductions using disease-dynamic models

    Miller, Ryan S / Pepin, Kim M

    Journal of animal science. 2019, v. 97, no. 6

    2019  

    Abstract: Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading ...

    Abstract Management and policy decisions are continually made to mitigate disease introductions in animal populations despite often limited surveillance data or knowledge of disease transmission processes. Science-based management is broadly recognized as leading to more effective decisions yet application of models to actively guide disease surveillance and mitigate risks remains limited. Disease-dynamic models are an efficient method of providing information for management decisions because of their ability to integrate and evaluate multiple, complex processes simultaneously while accounting for uncertainty common in animal diseases. Here we review disease introduction pathways and transmission processes crucial for informing disease management and models at the interface of domestic animals and wildlife. We describe how disease transmission models can improve disease management and present a conceptual framework for integrating disease models into the decision process using adaptive management principles. We apply our framework to a case study of African swine fever virus in wild and domestic swine to demonstrate how disease-dynamic models can improve mitigation of introduction risk. We also identify opportunities to improve the application of disease models to support decision making to manage disease at the interface of domestic and wild animals. First, scientists must focus on objective-driven models providing practical predictions that are useful to those managing disease. In order for practical model predictions to be incorporated into disease management a recognition that modeling is a means to improve management and outcomes is important. This will be most successful when done in a cross-disciplinary environment that includes scientists and decision makers representing wildlife and domestic animal health. Lastly, including the economic principles of value-of-information and cost-benefit analysis as model predictions can facility more efficient management decisions and improve communication of model forecasts. These opportunities to integrating disease-dynamic models into management and decision making process are expected to improve surveillance systems, risk mitigations, outbreak preparedness and response activities.
    Keywords African swine fever virus ; adaptive management ; animal diseases ; animal health ; case studies ; cost benefit analysis ; decision making ; disease models ; disease surveillance ; disease transmission ; issues and policy ; monitoring ; prediction ; risk ; scientists ; swine ; uncertainty ; wild animals ; wildlife
    Language English
    Size p. 2291-2307.
    Document type Article
    ZDB-ID 390959-1
    ISSN 1525-3163 ; 0021-8812
    ISSN (online) 1525-3163
    ISSN 0021-8812
    DOI 10.1093/jas/skz125
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Detection error influences both temporal seroprevalence predictions and risk factors associations in wildlife disease models

    Tabak, Michael A / Pedersen, Kerri / Miller, Ryan S

    Ecology and evolution. 2019 Aug. 27, v. 9

    2019  

    Abstract: 1. Understanding the prevalence of pathogens in invasive species is essential to guide efforts to prevent transmission to agricultural animals, wildlife, and humans. Pathogen prevalence can be difficult to estimate for wild species due to imperfect ... ...

    Abstract 1. Understanding the prevalence of pathogens in invasive species is essential to guide efforts to prevent transmission to agricultural animals, wildlife, and humans. Pathogen prevalence can be difficult to estimate for wild species due to imperfect sampling and testing (pathogens may not be detected in infected individuals and erroneously detected in individuals that are not infected). The invasive wild pig (Sus scrofa, also referred to as wild boar and feral swine) is one of the most wide‐ spread hosts of domestic animal and human pathogens in North America. 2. We developed hierarchical Bayesian models that account for imperfect detection to estimate the seroprevalence of five pathogens (porcine reproductive and respiratory syndrome virus, pseudorabies virus, Influenza A virus in swine, Hepatitis E virus, and Brucella spp.) in wild pigs in the United States using a dataset of over 50,000 samples across nine years. To assess the effect of incorporating detection error in models, we also evaluated models that ignored detection error. Both sets of models included effects of demographic parameters on seroprevalence.We compared our predictions of seroprevalence to 40 published studies, only one of which accounted for imperfect detection. 3. We found a range of seroprevalence among the pathogens with a high seroprevalence of pseudorabies virus, indicating significant risk to livestock and wildlife. Demographics had mostly weak effects, indicating that other variables may have greater effects in predicting seroprevalence. 4. Models that ignored detection error led to different predictions of seroprevalence as well as different inferences on the effects of demographic parameters. 5. Our results highlight the importance of incorporating detection error in models of seroprevalence and demonstrate that ignoring such error may lead to erroneous conclusions about the risk associated with pathogen transmission. When using opportunistic sampling data to model seroprevalence and evaluate risk factors, detection error should be included.
    Keywords Betaarterivirus suid 1 ; Brucella ; Influenza A virus ; Orthohepevirus A ; Suid alphaherpesvirus 1 ; Sus scrofa ; animal pathogens ; data collection ; demographic statistics ; detection ; disease models ; disease transmission ; evolution ; hosts ; humans ; invasive species ; lead ; prediction ; prevalence ; risk factors ; sampling ; seroprevalence ; swine ; testing ; wild boars ; wildlife ; wildlife diseases ; United States
    Language English
    Dates of publication 2019-0827
    Size p. 10404-10414.
    Document type Article
    Note NAL-light
    ISSN 2045-7758
    DOI 10.1002/ece3.5558
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Deriving spatially explicit direct and indirect interaction networks from animal movement data

    Yang, Anni / Wilber, Mark Q. / Manlove, Kezia R. / Miller, Ryan S. / Boughton, Raoul / Beasley, James / Northrup, Joseph / VerCauteren, Kurt C. / Wittemyer, George / Pepin, Kim

    Ecology and Evolution. 2023 Mar. 26, v. 13, no. 3 p.e9774-

    2023  

    Abstract: Quantifying spatiotemporally explicit interactions within animal populations facilitates the understanding of social structure and its relationship with ecological processes. Data from animal tracking technologies (Global Positioning Systems [“GPS”]) can ...

    Abstract Quantifying spatiotemporally explicit interactions within animal populations facilitates the understanding of social structure and its relationship with ecological processes. Data from animal tracking technologies (Global Positioning Systems [“GPS”]) can circumvent longstanding challenges in the estimation of spatiotemporally explicit interactions, but the discrete nature and coarse temporal resolution of data mean that ephemeral interactions that occur between consecutive GPS locations go undetected. Here, we developed a method to quantify individual and spatial patterns of interaction using continuous-time movement models (CTMMs) fit to GPS tracking data. We first applied CTMMs to infer the full movement trajectories at an arbitrarily fine temporal scale before estimating interactions, thus allowing inference of interactions occurring between observed GPS locations. Our framework then infers indirect interactions—individuals occurring at the same location, but at different times—while allowing the identification of indirect interactions to vary with ecological context based on CTMM outputs. We ass
    Keywords animals ; evolution ; social structure ; temporal variation
    Language English
    Dates of publication 2023-0326
    Publishing place Wiley
    Document type Article ; Online
    Note Resource is Open Access
    ZDB-ID 2635675-2
    ISSN 2045-7758
    ISSN 2045-7758
    DOI 10.1002/ece3.9774
    Database NAL-Catalogue (AGRICOLA)

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