274 research outputs found

    Emerging Pathogen in Wild Amphibians and Frogs (Rana catesbeiana) Farmed for International Trade

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    Chytridiomycosis is an emerging disease responsible for global decline and extinction of amphibians. We report the causative agent, Batrachochytrium dendrobatidis, in North American bullfrogs (Rana catesbeiana) farmed for the international restaurant trade. Our findings suggest that international trade may play a key role in the global dissemination of this and other emerging infectious diseases in wildlife

    An Economic and Policy Framework for Pandemic Control and Prevention

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    Pandemics have a long history in our global population, from the Justinian Plague of AD541-2 through the Black Death of the middle ages to the 1918 flu and a series of recent infections such as HIV/AIDS, SARS, and Ebola. Pandemics are diseases with global spread, meaning they typically affect more than one continent. Historical reviews of the natural history of pandemics suggest some common themes: 1) in the majority of cases, they are caused by diseases that were previously unknown; 2) they often exploit new travel and trade networks; and 3) they frequently originate in wildlife species in remote regions. With the growing interface between human populations and wildlife species, and increases in globalization and air travel, it is likely that pandemic incidences will only become more frequent. Understanding what brings a disease into a population and causes it to evolve the ability for sustained human-to-human transmission can provide a potential policy framework for preventing pandemics because intervention strategies can be tailored to reduce the threat at its origin. However, before we can enact policies, we need to understand when and where to act and how much they will cost

    Comparison of Intravenous Medetomidine and Medetomidine/Ketamine for Immobilization of Free-Ranging Variable Flying Foxes (Pteropus hypomelanus)

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    Medetomidine (0.03 mg/kg) and medetomidine/ketamine (0.05/5.0 and 0.025/2.5 mg/kg), administered by intravenous injection, were evaluated for short-term immobilization of wild-caught variable flying foxes (Pteropus hypomelanus). Medetomidine alone produced incomplete chemical restraint and a stressful, prolonged induction. Both ketamine/medetomidine doses produced a smooth induction and complete immobilization. The combined medetomidine/ketamine dose of 0.025/2.5 mg/kg produced a rapid induction (232±224 sec) with minimal struggling and vocalization, a complete and effective immobilization period, and tended to lead to a faster and better quality recovery than medetomidine alone or a higher dose of medetomidine and ketamine (0.05/5.0 mg/kg), thus reducing holding time and permitting an earlier release of the bat back into the wild

    Land Use and West Nile Virus Seroprevalence in Wild Mammals

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    We examined West Nile virus (WNV) seroprevalence in wild mammals along a forest-to-urban gradient in the US mid-Atlantic region. WNV antibody prevalence increased with age, urbanization, and date of capture for juveniles and varied significantly between species. These findings suggest several requirements for using mammals as indicators of transmission
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