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One Health is an approach calling for "the collaborative efforts of multiple disciplines working locally, nationally, and globally, to attain optimal health for people, animals and our environment", as defined by the One Health Initiative Task Force (OHITF). [2] It developed in response to evidence of the spreading of zoonotic diseases between species and increasing awareness of "the interdependence of human and animal health and ecological change". [3] : 205 [4] In this viewpoint, public health is no longer seen in purely human terms. [5] [6] Due to a shared environment and highly conserved physiology, animals and humans not only suffer from the same zoonotic diseases but can also be treated by either structurally related or identical drugs. For this reason, special care must be taken to avoid unnecessary or over-treatment of zoonotic diseases, particularly in the context of drug resistance in infectious microbes. [7]
A number of organizations throughout the world support the objectives of "One Health" including the One Health Commission (OHC), One Health Initiative, One Health Platform, CDC One Health Office, and the Quadripartite Organizations. The Quadripartite Organizations are:
In particular, the One Health High Level Expert Panel, an independent advisory group to the Quadripartite Organizations, [8] provided a comprehensive definition of One Health, whereby:
"One Health is an integrated, unifying approach that aims to sustainably balance and optimize the health of humans, animals, plants and ecosystems. It recognizes the health of humans, domestic and wild animals, plants and the wider environment (including ecosystems) are closely linked and interdependent. The approach mobilizes multiple sectors, disciplines and communities at varying levels of society to work together to foster well-being and tackle threats to health and ecosystems, while addressing the collective need for clean water, energy and air, safe and nutritious food, taking action on climate change, and contributing to sustainable development." [8]
Calvin Schwabe, a veterinarian trained in public health, coined the term "One Medicine" in a veterinary medical textbook in 1964 to reflect the similarities between animal and human medicine and stress the importance of collaboration between veterinarians and physicians to help solve global health problems. [10] He established a department at the University of California, Davis, to jointly address issues in the animal and human health sciences. [3]
In 2004, The Wildlife Conservation Society held a conference called "One World, One Health" at Rockefeller University in New York. Out of that conference the twelve Manhattan Principles were created to describe a unified approach to preventing epidemic diseases. [3] [11] [12] These principles emphasized links between humans, animals, and the environment, their importance in understanding disease dynamics, and the need for interdisciplinary approaches to prevention, education, investment, and policy development. [12]
Due to global scares surrounding the H5N1 influenza outbreaks of the early-mid 2000s, the American Veterinary Medical Association established a One Health Initiative Task Force in 2006, the American Medical Association passed a One Health resolution to promote partnering between veterinary and human medical organizations in 2007, and a One Health approach was recommended for responses to global disease outbreaks in 2007. [11] [10] Building on these initiatives, the Food and Agriculture Organization (FAO), World Organization for Animal Health (OIE), and World Health Organization (WHO) came together with the United Nations Children's Fund (UNICEF), United Nations System Influenza Coordination, and the World Bank to develop a framework entitled Contributing to One World, One Health-A Strategic Framework for Reducing Risks of Infectious Diseases at the Animal-Human-Ecosystems Interface in 2008, reiterating recommendations for a One Health approach to global health. [11] [10] This framework was expanded and implementable policies were developed at Stone Mountain, Georgia in May 2010. [3] [11] [10] International meetings on One Health were held in 2011 in Africa and Australia. [11] [10]
In 2012, Barbara Natterson-Horowitz, a physician, and Kathryn Bowers, a science journalist, published the book Zoobiquity , coining the term as they drew parallels between animal and human health through vivid case studies. They called for the biomedical scientific and clinical communities to rediscover comparative medicine and reexamine human and animal health in terms of evolution and the environment. A New York Times bestseller, [13] the book has been described as "easy to read and entertaining" in its presentation of ideas similar to the "One Health" concept, but also criticized as lacking depth and failing to recognize the extent to which animals and humans have differently evolved as complex systems. [14]
In 2016, The One Health Commission, One Health Platform, and One Health Initiative Team deemed International One Health Day to be November 3. [15]
In 2019, Senator Tina Smith and Representative Kurt Schrader introduced the Advancing Emergency Preparedness Through One Health Act into the United States Senate and House of Representatives, respectively. [16] [17] This bi-partisan piece of legislation would require that the Department of Health and Human Services, Department of Agriculture, and other federal agencies develop a coordinated plan to create a One Health Framework to help prepare responses to zoonotic disease and prevent disease outbreaks. [18] The bill was re-introduced by Tina Smith and Todd Young on March 18, 2021. [19] [20] [3]
In 2007, Roger K. Mahr from the American Veterinary Medical Association, Jay H. Glasser from the American Public Health Association, and Ronald M. Davis from the American Medical Association came together as liaisons with other health science professionals, academics, students, government workers, and industry scientists to create a task force and have teleconferences to discuss One Health. [21] [22] This One Health Initiative Task Force created a report in 2008 which outlined recommendations to:
The One Health Commission (OHC) was chartered in Washington, D.C. in 2009 as a 501(c)3 non-profit organization. Its mission is to connect individuals and create relationships across human, animal, and environmental health sectors, as well as to educate the public about these issues with the intent to improve global health. [25] Roger Mahr was the founding CEO. [21] A request for proposal for an institutional partner was put forth in 2010, and Iowa State University was selected to be the main site for operations. [21] In 2013, Roger Mahr retired from the commission and the operations site moved to the Research Triangle of North Carolina, where it currently resides. [21] The current executive director is Cheryl Stroud, a veterinarian, who has held the position since 2013. [26]
The One Health Commission began in 2014 compiling a Who's Who in One Health, a Directory of organizations around the world that are actively working to further the One Health paradigm shift. [27] The OHC also oversees a Global One Health Community listserv. [28] In addition the commission has a webpage known as the One Health Library with many types of resources available on the topic of or connected to One Health. [29]
The One Health Initiative is an interdisciplinary movement to create collaborations between animal, human, and environmental health organizations including the American Veterinary Medical Association, American Medical Association, Centers for Disease Control and Prevention, United States Department of Agriculture, Vétérinaires sans Frontières/ Tierärzte ohne Grenzen and the United States National Environmental Health Association, among others. [30] Such collaboration, which often remains very limited, could lead to more quick and profound exchange of knowledge and insights between disciplines and professionals, which is important to better and more rapidly respond to outbreaks and newly emerging zoonoses and diseases. [31]
The One Health Platform is a scientific reference network to unite researchers and experts to better understand and prepare for zoonotic disease outbreaks from animals to humans, and antimicrobial resistance, including a better understanding of environmental factors that impact disease dynamics. The management board is made up of Ab Osterhaus, John Mackenzie, and Chris Vanlangendonck. [32]
The organization has nine objectives, which include:
The One Health Platform was responsible for organizing the World One Health Congress meeting each year 2015 - 2020. [34] The next World One Health Congress scheduled for 2022 continued in Singapore hosted by SingHealth Duke-NUS Global Health Institute. [35]
FAO works closely with WOAH (formerly OIE) and WHO, referred to all together as the Tripartite organizations. [36] WHO was a partner in the 2008 establishment of a strategic One Health framework for approaching global health problems. [11] [10] In September 2017, a feature page for One Health was included on the WHO website, defining One Health and highlighting important topic areas such as food safety, zoonotic disease, and antimicrobial resistance. [37] WOAH (headquartered in Paris, France) [38] was also a partner in establishing a strategic One Health framework in 2008. [11] [10] WOAH works to maintain transparency surrounding global animal disease, collect and distribute veterinary information, publish international trade standards for animals/ animal products, improve veterinary services globally, and to promote animal welfare and food safety. [39]
FAO put forth in 2011 a strategic action plan for One Health, which had the objective to strengthen food security by improving animal production systems and veterinary services and called for action in improving collaborations between animal, human, and environmental health sectors. [40] FAO, WOAH and WHO published a new guide to approaching zoonotic disease with a One Health framework in 2019. [41]
In February 2021, acknowledging the importance of the environment for the One Health approach, the three partner organizations invited UNEP to join the Tripartite. [8] In March of the same year, the Tripartite and UNEP agreed to work together on a strategy to apply the One Health approach in the prevention of future pandemics. One year later, in March 2022, the Twenty-eighth Tripartite Annual Executive Meeting saw the signing of a memorandum of understanding by all organizations involved to mark the change from a Tripartite to a Quadripartite partnership. [8]
The Centers for Disease Control and Prevention (CDC), created a One Health Office in 2009, becoming the first United States federal agency to have an office dedicated to this field. This office works alongside other animal, human, and environmental health organizations both within the United States and across the world in order to increase the awareness of One Health and develop tools to help strengthen One Health movements. [42] The CDC One Health Office is involved in multiple initiatives, including working to implement a Zoonotic Disease Prioritization process, creating Global Health Security Agenda Action Packages, overseeing the Zoonoses Education Coalition, developing guidelines with the National Association of State Public Health Veterinarians, and helping educate youth involved with agriculture about influenza. [43] Additionally, the CDC One Health Office hosts webinars to educate audiences about One Health issues such as food safety, antimicrobial resistance, and recent disease outbreaks. [44]
The One Health Zoonotic Disease Prioritization process is led by the CDC. It involves holding workshops internationally to prioritize which zoonotic diseases are of the most concern and helping countries develop action plans to address those diseases. [45] The process involves 3-6 facilitators representing human, animal, and environmental health sectors, up to 12 voting members which represent human health/public health, agriculture/livestock, wildlife/fisheries, the environment and other relevant government sectors, and 10-15 advisors from international organizations (such as the WHO, FAO or OIE), academic partners or NGOs not directly involved in zoonotic diseases. [45] The CDC One Health Office trains facilitators and it takes months to prepare for a workshop to acquire the necessary resources, identify participants, review zoonotic information and confirm logistics. [45] Completed workshops have been held in a variety of countries including Pakistan, Tanzania, Thailand, Uzbekistan and China. [46] Diseases most commonly prioritized include rabies, brucellosis, influenza, Ebola virus, and Rift Valley fever. [46]
To ensure fair and community-oriented investment in One Health initiatives that involve multiple institutional and international partners, it is crucial to strengthen their governance foundations. The global One Health community can learn three important lessons to make One Health more inclusive.
In 2017, a case study was undertaken by a team of researchers to explore the health implications linked to the land application of biosolids within the framework of One Health. This investigation encompassed the One Health study design across all three health domains, revealing certain limitations encountered when applying One Health research in practical settings. These obstacles encompass, among others, the necessity for enhanced collaborations spanning different fields and administrative hurdles, the enhancement of science-driven risk management strategies, and the augmentation of workforce and research infrastructure capabilities, particularly in developing nations. Moreover, notable impediments to the execution of One Health research may continue if funding agencies fail to establish effective mechanisms to bolster interdisciplinary One Health research. [48]
The World Organisation for Animal Health (WOAH), formerly the Office International des Epizooties (OIE), is an intergovernmental organisation founded in 1924, coordinating, supporting and promoting animal disease control. The primary objective of WOAH is to control epizootic diseases and prevent their spread. Further objectives include the sharing of transparent, scientific information; international solidarity; sanitary safety; and the promotion of veterinary services‚ food safety and animal welfare.
A zoonosis or zoonotic disease is an infectious disease of humans caused by a pathogen that can jump from a non-human vertebrate to a human. When humans infect non-humans, it is called reverse zoonosis or anthroponosis.
Influenza A virus (IAV) is the only species of the genus Alphainfluenzavirus of the virus family Orthomyxoviridae. It is a pathogen with strains that infect birds and some mammals, as well as causing seasonal flu in humans. Mammals in which different strains of IAV circulate with sustained transmission are bats, pigs, horses and dogs; other mammals can occasionally become infected.
Avian influenza, also known as avian flu or bird flu, is a disease caused by the influenza A virus, which primarily affects birds but can sometimes affect mammals including humans. Wild aquatic birds are the primary host of the influenza A virus, which is enzootic in many bird populations.
Glanders is a contagious zoonotic infectious disease that occurs primarily in horses, mules, and donkeys. It can be contracted by other animals, such as dogs, cats, pigs, goats, and humans. It is caused by infection with the bacterium Burkholderia mallei.
Mycobacterium bovis is a slow-growing aerobic bacterium and the causative agent of tuberculosis in cattle. It is related to Mycobacterium tuberculosis, the bacterium which causes tuberculosis in humans. M. bovis can jump the species barrier and cause tuberculosis-like infection in humans and other mammals.
Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes influenza (flu), predominantly in birds. It is enzootic in many bird populations, and also panzootic. A/H5N1 virus can also infect mammals that have been exposed to infected birds; in these cases, symptoms are frequently severe or fatal.
Conservation medicine is an emerging, interdisciplinary field that studies the relationship between human and non-human animal health and environmental conditions. Specifically, conservation medicine is the study of how the health of humans, animals, and the environment are interconnected and affected by conservation issues. It is also known as planetary health, environmental medicine, medical geology, or ecological medicine.
EcoHealth Alliance is a US-based non-governmental organization with a stated mission of protecting people, animals, and the environment from emerging infectious diseases. The nonprofit organization focuses on research aimed at preventing pandemics and promoting conservation in hotspot regions worldwide.
In epidemiology, a disease vector is any living agent that carries and transmits an infectious pathogen such as a parasite or microbe, to another living organism. Agents regarded as vectors are mostly blood-sucking insects such as mosquitoes. The first major discovery of a disease vector came from Ronald Ross in 1897, who discovered the malaria pathogen when he dissected the stomach tissue of a mosquito.
The eradication of infectious diseases is the reduction of the prevalence of an infectious disease in the global host population to zero.
The Global Alliance for Rabies Control (GARC) is a non-profit organization that aims to eliminate deaths from canine rabies by 2030. Rabies is a neglected disease of poverty, which is almost 100% fatal, but can also be prevented with available vaccines. The Global Alliance for Rabies Control's work centers around the One Health Approach where vaccinating dogs stops the disease at its source and protects the whole community. Where the funding and political will exist, canine rabies has been eliminated. Inequality in access to preventive health care and proven control methods means that around 59,000 people, almost all in Africa and Asia, die every year.
The concept of One Health is the unity of multiple practices that work together locally, nationally, and globally to help achieve optimal health for people, animals, and the environment. When the people, animals, and environment are put together they make up the One Health Triad .The One Health Triad shows how the health of people, animals, and the environment is linked to one another. With One Health being a worldwide concept, it makes it easier to advance health care in the 21st century. When this concept is used, and applied properly, it can help protect people, animals, and the environment in the present and future generations.
The One Health Institute works at the interface of animals, people, plants, and the environment to solve complex problems that impact health and conservation around the world. The institute is part of the UC Davis School of Veterinary Medicine and is home to the Karen C. Drayer Wildlife Health Center and many other programs and projects. The executive director of the One Health Institute is Dr. Michael Ziccardi. The One Health approach recognizes that the health of domestic animals, wildlife, and people are inextricably linked to one another and the environment.
A foreign animal disease (FAD) is an animal disease or pest, whether terrestrial or aquatic, not known to exist in the United States or its territories. When these diseases can significantly affect human health or animal production and when there is significant economic cost for disease control and eradication efforts, they are considered a threat to the United States. Another term gaining preference to be used is transboundary animal disease (TAD), which is defined as those epidemic diseases which are highly contagious or transmissible and have the potential for very rapid spread, irrespective of national borders, causing serious socio-economic and possibly public health consequences. An emerging animal disease "may be defined as any terrestrial animal, aquatic animal, or zoonotic disease not yet known or characterized, or any known or characterized terrestrial animal or aquatic animal disease in the United States or its territories that changes or mutates in pathogenicity, communicability, or zoonotic potential to become a threat to terrestrial animals, aquatic animals, or humans."
The World Organisation for Animal Health's Terrestrial Animal Health Code (TAHC) implements improvement standards of worldwide animal health and welfare and public health from a veterinary point of view. It includes standards international trade in terrestrial biological specimens and their merchandise. National veterinary authorities use it to provide for early detection of pathogens and to prevent the transfer of same by international trade in animals and animal merchandise, while skirting "unjustified sanitary barriers to trade".
Animal vaccination is the immunisation of a domestic, livestock or wild animal. The practice is connected to veterinary medicine. The first animal vaccine invented was for chicken cholera in 1879 by Louis Pasteur. The production of such vaccines encounter issues in relation to the economic difficulties of individuals, the government and companies. Regulation of animal vaccinations is less compared to the regulations of human vaccinations. Vaccines are categorised into conventional and next generation vaccines. Animal vaccines have been found to be the most cost effective and sustainable methods of controlling infectious veterinary diseases. In 2017, the veterinary vaccine industry was valued at US$7 billion and it is predicted to reach US$9 billion in 2024.
John Andrew Crump MB ChB, MD, DTM&H, FRACP, FRCPA, FRCP is a New Zealand-born infectious diseases physician, medical microbiologist, and epidemiologist. He is Professor of Medicine, Pathology, and Global Health at the University of Otago and an adjunct professor of medicine, Pathology, and Global Health at Duke University. He served as inaugural co-director of the Otago Global Health Institute, one of the university's research centres. His primary research interest is fever in the tropics, focusing on invasive bacterial diseases and bacterial zoonoses.
David Hayman is a New Zealand-based epizootic epidemiologist and disease ecologist whose general multi-disciplinary work focuses on the maintenance of infectious diseases within their hosts and the process of emergence and transmission to humans specifically related to bats. He has gathered data on the relationship between ecological degradation due to anthropogenic actions, and increased pathogen emergence in humans and animals. During COVID-19 he was involved as an expert in several international collaborations, some convened by the World Health Organization, and was a regular commentator in the New Zealand media about the country's response to the pandemic. He has had lead roles in research organisations at Massey University and Te Pūnaha Matatini and was the recipient of the 2017 Rutherford Discovery Fellowship Award. Since 2014 Hayman has been a professor at Massey University.
A. Alonso Aguirre is an American veterinarian, wildlife biologist, academic and researcher. He is Professor and Chair of the Department of Environmental Science and Policy, College of Science, and he also chairs the university Institutional Animal Care and Use Committee (IACUC) at George Mason University.
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