Publications by authors named "Sarah H Olson"

Rapid and comprehensive data sharing is vital to the transparency and actionability of wildlife infectious disease research and surveillance. Unfortunately, most best practices for publicly sharing these data are focused on pathogen determination and genetic sequence data. Other facets of wildlife disease data - particularly negative results - are often withheld or, at best, summarized in a descriptive table with limited metadata.

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The status of health monitoring practices in protected areas (PAs) is largely unknown, but potential gaps could undermine biodiversity conservation at these key sites. There is also a lack of baseline information regarding local perceptions of wildlife, human, and livestock health relevance that could affect health monitoring implementation in PAs. To address these deficiencies, we conducted a web-based survey of data managers from PAs worldwide.

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Wildlife trafficking creates favorable scenarios for intra- and inter-specific interactions that can lead to parasite spread and disease emergence. Among the fauna affected by this activity, primates are relevant due to their potential to acquire and share zoonoses - infections caused by parasites that can spread between humans and other animals. Though it is known that most primate parasites can affect multiple hosts and that many are zoonotic, comparative studies across different contexts for animal-human interactions are scarce.

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Background: Since 2005, highly pathogenic avian influenza A H5N1 viruses have spread from Asia worldwide, infecting poultry, humans and wild birds. Subsequently, global interest in avian influenza (AI) surveillance increased.

Objectives: Mongolia presents an opportunity to study viruses in wild birds because the country has very low densities of domestic poultry and supports large concentrations of migratory water birds.

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We describe a case of lumpy skin disease in an endangered banteng in Cambodia and the subsequent initiation of a vaccination campaign in domestic cattle to protect wild bovids from disease transmission at the wildlife-livestock interface. Lumpy skin disease virus (LSDV) was first detected in domestic cattle in Cambodia in June of 2021 and rapidly spread throughout the country. In September 2021, a banteng was seen in Phnom Tnout Phnom Pok wildlife sanctuary with signs of lumpy skin disease.

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Article Synopsis
  • A One Health surveillance approach was used in Vietnam to monitor biological samples from bats, pigs, and humans for zoonotic viruses at high-risk locations.
  • Over 1,600 samples were tested for five types of viruses, revealing a significant presence of coronaviruses in bats near pigs, indicating a potential spillover risk due to high pig density.
  • While direct human infections from these bat viruses weren't found, serological tests indicated possible past exposure to other dangerous viruses, showcasing the importance of coordinated surveillance in tracking viral threats.
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As part of a public health behavior change and communication strategy related to the identification of a novel ebolavirus in bats in Sierra Leone in 2016, a consortium of experts launched an effort to create a widely accessible resource for community awareness and education on reducing disease risk. The resulting picture book, , includes technical content developed by a consortium of experts in public health, animal health, conservation, bats, and disease ecology from 30 countries. The book has now been adapted, translated, and used in more than 20 countries in Africa and Asia.

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Orbiviruses are arthropod borne viruses of vertebrates, with some of them being important pathogens of veterinary, conservation and economic importance, while others are occasionally associated with human disease. Some apparently bat specific orbiviruses have been detected, but little is known about their distribution and diversity. We thus sampled and screened 52 bats living in the Congo Basin, and detected RNA indicative of a novel orbivirus in a single banana serotine (Afronycteris nanus) by PCR.

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Wildlife and wildlife interfaces with people and livestock are essential surveillance targets to monitor emergent or endemic pathogens or new threats affecting wildlife, livestock, and human health. However, limitations of previous investments in scope and duration have resulted in a neglect of wildlife health surveillance (WHS) systems at national and global scales, particularly in lower and middle income countries (LMICs). Building on decades of wildlife health activities in LMICs, we demonstrate the implementation of a locally-driven multi-pronged One Health approach to establishing WHS in Cambodia, Lao PDR and Viet Nam under the WildHealthNet initiative.

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Article Synopsis
  • The text discusses progress made by sustainable development practitioners in reducing human infectious diseases while promoting conservation through a systematic literature review of 46 proposed solutions.
  • Some solutions showed medium to high-quality evidence of success, but there were significant evidence gaps indicating a need for further research.
  • Stakeholders are encouraged to use the Review and an online database to discover, customize, or innovate new win-win interventions.
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On the 8th of May, 2018, an outbreak of Ebola virus disease (EVD) was declared, originating in the Bikoro region of the Democratic Republic of the Congo (DRC) near the border with neighboring Republic of the Congo (ROC). Frequent trade and migration occur between DRC and ROC-based communities residing along the Congo River. In June 2018, a field team was deployed to determine whether Zaire ebolavirus (Ebola virus (EBOV)) was contemporaneously circulating in local bats at the human-animal interface in ROC near the Bikoro EVD outbreak.

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AbstractHibernation requires balancing energy and water demands over several months. Many studies have noted the importance of fat for hibernation energy budgets, but protein catabolism in hibernation has received less attention, and whole-animal changes in lean mass have not previously been considered. We used quantitative magnetic resonance body composition analysis to measure deposition of fat and lean mass of cave myotis () during the prehibernation period and decreases in fat and lean mass of Townsend's big-eared bats () during hibernation.

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Article Synopsis
  • Researchers studied pangolins and civets in Viet Nam to identify possible sources of SARS-related coronaviruses, screening 696 specimens for various viral RNA, but found most were negative for these viruses.
  • They discovered 12 specimens from confiscated pangolins that tested positive for Sarbecoviruses, which were related to coronaviruses found in pangolins from other parts of China.
  • Data collection on wildlife confiscation showed that many pangolins in Viet Nam were being trafficked toward consumers in China, highlighting the global trade issue surrounding these animals.
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Hibernation is widespread among mammals in a variety of environmental contexts. However, few experimental studies consider interspecific comparisons, which may provide insight into general patterns of hibernation strategies. We studied 13 species of free-living bats, including populations spread over thousands of kilometers and diverse habitats.

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Article Synopsis
  • White-nose syndrome (WNS) has really hurt bat populations in eastern and central North America for over ten years.
  • The research focuses on how the characteristics of bats, a cold-loving fungus, and their hibernation spots work together to impact the disease's effects.
  • By studying different factors, scientists created models to better understand bat body fat and how long they hibernate, which suggests that bats in western North America could face similar dangers from WNS as those in the east and central regions.
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Species with broad geographic ranges may experience varied environmental conditions throughout their range leading to local adaptation. Variation among populations reflects potential adaptability or plasticity, with implications for populations impacted by disease, climate change, and other anthropogenic influences. However, behavior may counteract divergent selection among populations.

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Coronaviruses play an important role as pathogens of humans and animals, and the emergence of epidemics like SARS, MERS and COVID-19 is closely linked to zoonotic transmission events primarily from wild animals. Bats have been found to be an important source of coronaviruses with some of them having the potential to infect humans, with other animals serving as intermediate or alternate hosts or reservoirs. Host diversity may be an important contributor to viral diversity and thus the potential for zoonotic events.

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The COVID-19 pandemic has re-focused attention on mechanisms that lead to zoonotic disease spillover and spread. Commercial wildlife trade, and associated markets, are recognized mechanisms for zoonotic disease emergence, resulting in a growing global conversation around reducing human disease risks from spillover associated with hunting, trade, and consumption of wild animals. These discussions are especially relevant to people who rely on harvesting wildlife to meet nutritional, and cultural needs, including those in Arctic and boreal regions.

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Unlabelled: Early detection of Ebola virus spillover into wildlife is crucial for rapid response. We developed and validated a portable, cold-chain independent Ebola virus RT-qPCR assay.

Methods: The field syringe-based RNA extraction method was compared with a conventional laboratory-based spin-column RNA extraction method.

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The family contains diverse viruses, including vector-borne and nonvector-borne viruses, some that are human pathogens, including rabies virus and also nonpathogenic viruses. Bats, which are a known reservoir of viruses with zoonotic potential including coronaviruses, also carry multiple rhabdoviruses such as but not limited to lyssaviruses. We collected samples from 193 insectivorous and frugivorous bats in the Republic of the Congo and tested them for rhabdovirus RNA.

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Article Synopsis
  • The USAID's PREDICT project is working to improve how we prevent and control diseases that can spread between animals and people.
  • They want to understand the risky behaviors of communities that live near animals and nature, to better detect and respond to potential diseases.
  • Researchers talked to people in high-risk jobs to learn what they think about the dangers of their work, finding that many don't see their activities as risky, which could make disease spread more likely.
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The death toll and economic loss resulting from the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic are stark reminders that we are vulnerable to zoonotic viral threats. Strategies are needed to identify and characterize animal viruses that pose the greatest risk of spillover and spread in humans and inform public health interventions. Using expert opinion and scientific evidence, we identified host, viral, and environmental risk factors contributing to zoonotic virus spillover and spread in humans.

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In multihost disease systems, differences in mortality between species may reflect variation in host physiology, morphology, and behavior. In systems where the pathogen can persist in the environment, microclimate conditions, and the adaptation of the host to these conditions, may also impact mortality. White-nose syndrome (WNS) is an emerging disease of hibernating bats caused by an environmentally persistent fungus, .

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It is of great scientific interest to identify interactions between genetic variants and environmental exposures that may modify the risk of complex diseases. However, larger sample sizes are usually required to detect gene-by-environment interaction (G × E) than required to detect genetic main association effects. To boost the statistical power and improve the understanding of the underlying molecular mechanisms, we incorporate functional genomics information, specifically, expression quantitative trait loci (eQTLs), into a data-adaptive G × E test, called aGEw.

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