Living with Wildlife through One Health

Uganda is a biodiversity-rich country home to iconic species including over half of the world’s mountain gorillas. Spanning around 241,000 km², it has a robust network of protected areas including 10 national parks, 12 wildlife reserves, and five community wildlife areas covering over 10% of its land. Key sites like Bwindi, Queen Elizabeth, Murchison Falls, and Kibale National Parks also underpin a thriving nature-based tourism sector, which contributes 7.7% to the national GDP and provides over 667,000 jobs.

The SARS-CoV-2 virus, the cause of COVID-19, emerged as a human pathogen in 2019. While it is thought to have a zoonotic source, the original wildlife reservoir and any potential intermediate hosts have not yet been identified. Phylogenetic analyses suggest the progenitor virus is related to beta-coronaviruses previously identified in bats. At this time, SARS-CoV-2 should be considered a human pathogen with people acting as reservoir and sustaining transmission. There is a possibility SARS-CoV-2 will become endemic in the human population and thus be considered as a potential reverse zoonosis to wildlife as with infectious diseases such as tuberculosis and influenza.

Currently the risk of human-to-animal transmission to non-captive wildlife species warrants concern. A number of cases have demonstrated natural human-to-animal transmission of SARS-CoV-2 in felids, canids and mustelids, the majority due to close and prolonged contact with infected households or people, and none has involved free-ranging wildlife. The identification of close phylogenetically-related viruses (e.g. in bats and pangolins), the presence of important cell receptor proteins (ACE2 receptors) and infection following natural exposure or experimental inoculation suggest that a wide range of mammalian species may be susceptible to SARS-CoV-2. Knowledge and experience with human-to-animal transmission with other human respiratory pathogens (e.g. metapneumovirus, measles, other human coronaviruses and tuberculosis) indicates that some species taxonomically closely related to humans (e.g. non-human primates) would likely be susceptible to infection and/or clinical disease caused by SARS-CoV-2.

There are valid concerns about the health of individuals or populations if infected with the virus and/or a wildlife population becoming a reservoir for SARS-CoV-2. Any wildlife species/taxa that becomes a reservoir for SARS-CoV-2 could pose a continued public health risk of zoonosis, a risk for the transmission of SARS-CoV-2 to other animal species, and the risk of negative perceptions of that species resulting in human threats to the species or their populations.

Efforts that require working with free-living wildlife are vital to professional management and conservation as well as the health of wildlife, people and ecosystems. The recommendations below were developed to minimize the risk of SARS-CoV-2 transmission from people to freeranging, wild mammals. Specifically, these recommendations are for people engaged in wildlife work* in the field, either in direct contact (e.g. handling) or indirect contact (e.g. within 2 meters or in a confined space) with free-ranging wild mammals, or working in situations in which free[1]ranging wild mammals may come in contact with surfaces or materials contaminated by infected personnel.

The wide-reaching effects of the COVID-19 pandemic have included immense loss of life and serious health and economic consequences across communities and  ecosystems. Tourism, which itself suffered a sharp disruption in the pandemic, is among the industries that have a strong interest to reduce risks and increase resilience toward a more sustainable model in line with a One Health approach. Protected and conserved areas (PCAs) are an especially important setting for sustainable tourism and can serve as a catalyst for wider adoption of best practices anchored in One Health principles that help to sustainability balance the health of people, animals, and  ecosystems. This report presents six core principles, which provide practical strategies for tour operators and wider tourism industry stakeholders in PCAs. They are intentionally broad, allowing for use and adaptation in any PCA context.

This IUCN–OIE publication provides a ‘how-to’ guide that will be useful to the growing and diverse range of professionals involved in assessment and management of wildlife-associated disease risk scenarios. The document has been co-written by 22 specialists in the fields of wildlife disease ecology, epidemiology, risk analysis, modelling, disease surveillance, diagnostics, wildlife management, research, teaching and conservation planning. These authors have pooled their knowledge and experience to make tools and processes at the cutting edge of wildlife disease risk analysis accessible to a broad global audience in an effort to ensure healthy ecosystems through better decision making. This is a companion volume to the Guidelines for Wildlife Disease Risk Analysis.

In India, despite an ever-increasing interface between animals and humans resulting in human-wildlife conflict (HWC) and risks of zoonotic diseases, measures to address the health of animals and humans are implemented by wildlife, veterinary and public health sector institutions through separate channels, which is inhibiting operationalization of One Health approach. The much needed mechanism for such coordination has been developed  and operationalised, embedded in an overarching capacity development plan, by the Indo-German Cooperation Project on HWC Mitigation in India. The project has successfully integrated One Health into the national HWC mitigation plan and guidelines, established a system of collaborative training courses, with forest, veterinary, agriculture and public health sector institutions and experts, which has resulted in a joint training curriculum and has strengthened specialised rapid response teams at field-level. 

The Bracken Cave Preserve is home to the largest bat colony in the world, an estimated 20 million Mexican free-tailed bats (Tadarida brasiliensis). Plans to construct a residential complex along the 1,521-acre tract adjacent to the cave mouth posed a serious risk to wildlife and the potential human population. Motivated by concerns for a nearby aquifer, but limited by a lack of zoning laws in the area, the local government commissioned a report on the potential public health risks of the development. The report outlined concerns for human exposure to various pathogens, from both exploring the cave and the bats’ presence around the new residences. To protect the bat and human populations, advocates from diverse sectors, including conservationists, health experts, city and county governments, and the public water utility, came together to purchase the tract of land. In 2014, the property was officially made into the Bracken Cave Preserve, protecting this area essential for environmental, animal, and human health in perpetuity.