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Microclimates Might Limit Indirect Spillover of the Bat Borne Zoonotic Hendra Virus

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dc.contributor Australian Institute Of Marine Science
dc.contributor Hlth Res Grp 1
dc.contributor Australian Inst Marine Sci
dc.contributor Coll Publ Hlth Med & Vet Sci
dc.contributor Montana State Univ
dc.contributor Montana State University
dc.contributor James Cook Univ
dc.contributor James Cook University SKERRATT, LEE F. MARTIN, GERARDO WEBB, REBECCA J. CHEN, CARLA PLOWRIGHT, RAINA K. 2017-07-20T22:34:59Z 2017-07-20T22:34:59Z 2019-07-08T02:28:57Z 2017-07-20T22:34:59Z 2017-07-20T22:34:59Z 2019-07-08T02:28:57Z 2017-07-01
dc.identifier.citation Martin G, Webb RJ, Chen C, Plowright RK, Skerratt LF (2017) Microclimates might limit indirect spillover of the bat borne zoonotic Hendra virus. Microbial Ecology 74: 106-115
dc.identifier.issn 0095-3628
dc.description.abstract Infectious diseases are transmitted when susceptible hosts are exposed to pathogen particles that can replicate within them. Among factors that limit transmission, the environment is particularly important for indirectly transmitted parasites. To try and assess a pathogens' ability to be transmitted through the environment and mitigate risk, we need to quantify its decay where transmission occurs in space such as the microclimate harbouring the pathogen. Hendra virus, a Henipavirus from Australian Pteropid bats, spills-over to horses and humans, causing high mortality. While a vaccine is available, its limited uptake has reduced opportunities for adequate risk management to humans, hence the need to develop synergistic preventive measures, like disrupting its transmission pathways. Transmission likely occurs shortly after virus excretion in paddocks; however, no survival estimates to date have used real environmental conditions. Here, we recorded microclimate conditions and fitted models that predict temperatures and potential evaporation, which we used to simulate virus survival with a temperature-survival model and modification based on evaporation. Predicted survival was lower than previously estimated and likely to be even lower according to potential evaporation. Our results indicate that transmission should occur shortly after the virus is excreted, in a relatively direct way. When potential evaporation is low, and survival is more similar to temperature dependent estimates, transmission might be indirect because the virus can wait several hours until contact is made. We recommend restricting horses' access to trees during night time and reducing grass under trees to reduce virus survival.
dc.description.sponsorship The College of Public Health, Medical and Veterinary Sciences, James Cook University was contracted by the Rural Industries Research and Development Corporation to undertake this research project. This research was funded by the Commonwealth of Australia, the State of New South Wales and the State of Queensland under the National Hendra Virus Research Program. We would like to thank BVSc Bruce Pott for arranging contact with private horse owners to undertake this study, and Drs. Deborah Middleton and Paul Selleck for granting access to the HeV survival data.
dc.language English
dc.subject Environmental Transmission
dc.subject Marine & Freshwater Biology
dc.subject Spillover
dc.subject Ecology
dc.subject Flying Foxes
dc.subject Inactivation
dc.subject Transmission
dc.subject Horses
dc.subject Microclimates
dc.subject Microbiology
dc.subject Model
dc.subject Absolute-humidity
dc.subject Surfaces
dc.subject Survival
dc.subject Environmental Sciences & Ecology
dc.subject Temperature
dc.title Microclimates Might Limit Indirect Spillover of the Bat Borne Zoonotic Hendra Virus
dc.type journal article
dc.identifier.doi 10.1007/s00248-017-0934-x
dc.identifier.wos WOS:000403255500011

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