One Health: The Theory and Practice of Integrated Health Approaches

One Health, the concept of combined veterinary and human health, has now expanded beyond emerging infectious diseases and zoonoses to incorporate a wider suite of health issues. Retaining its interdisciplinary focus which combines theory with practice, this new edition illustrates the contribution of One Health collaborations to real-world issues such as sanitation, economics, food security and vaccination programmes. It includes more non-infectious disease issues and climate change discussion alongside revised case studies and expanded methodology chapters to draw out implications for practice. Promoting an action-based, solutions-oriented approach, One Health: The Theory and Practice of Integrated Health Approaches highlights the lessons learned for both human and animal health professionals and students.

Prof. Dr. Jakob Zinsstag is a veterinarian with a PhD in tropical animal health. Since 1998 he has led a research group on human and animal health at the Swiss Tropical and Public Health Institute, and has been deputy head of the department of Epidemiology and Public Health at Swiss TPH since 2011. He spent eight years in West Africa at the International Trypanotolerance Centre in The Gambia and four years as the director of the Centre Suisse de Recherches Scientifiques in Côte d'Ivoire. He is also past president of the International Association for Ecology and Health and president of the scientific board of the Transdisciplinary network of the Swiss Academies. Prof. Zinsstag focuses on the control of zoonoses in developing countries and the provision of health care to mobile pastoralists using a One Health approach.

Esther Schelling is the Head of Innovations, Learning and Quality Assurance at Vétérinaires sans Frontières Suisse (VSF-Suisse). After more than 20 years of research on health of pastoralists, zoonoses and One Health approaches at the Swiss Tropical and Public Health Institute, she wanted to foster implementation of gained main lessons. She is co-editor of the textbook 'One Health: The theory and practice of integrated health approaches' (2015/2020). The added value of a closer cooperation between the health sectors are seen in the earlier recognition of health events, in better control of zoonosis and more efficient surveillance and integrated health services - but should be shown more explicitly. The OH4 HEAL project led by VSF-Suisse seeks to improve integrated health services for families, their livestock, and the environment they live in pastoral cross-border regions of Ethiopia, Kenya and Somali.

Dr. Lisa Crump is a veterinarian (DVM University of Illinois USA; BSc Cornell University USA) and epidemiologist (MSc University of Basel). She has worked in the Human and Animal Health Unit at the Swiss Tropical and Public Health Institute as a researcher since 2010, validating One Health approaches to improve health care delivery and access in marginalized populations and strengthen local health capacity. She has field experience in Africa and Southeast Asia and global One Health consulting expertise. She was the managing editor of One Health: Theory and methods of integrated health approaches and co-produced three open online courses on One Health and transdisciplinary research. Her competence includes One Health conceptual thinking in research and development for health care provision, zoonoses, antimicrobial resistance and pandemic prevention.

Dr Susan Catherine Cork is a professor at the University of Calgary, Faculty of Veterinary Medicine, Canada. Her research interests include veterinary public health, infectious diseases, animal health policy, and international development. Dr Cork has travelled extensively, including work as a volunteer veterinarian in South Asia, and she has over 25 years' experience working with Bhutanese colleagues on animal health related projects. She recently co-edited a Book on One Health Case Studies: Practical Applications of the Transdisciplinary Approach (2025), published by CABI and was the lead editor for a book on One Health and EcoHealth Case Studies, published in 2016 and 2024 respectively, She was also the lead editor for the third edition of the Veterinary Laboratory and Field Manual (2019) which was endorsed by the World Organization for Animal Health. The latter books were based on field experience gained working with colleagues in international development projects as well as from leading transdisciplinary teams alongside government agencies and NGOs in the United Kingdom, New Zealand, Canada, and Bhutan (South Asia). Dr Cork holds a veterinary degree and PhD from Massey University and a postgraduate Diploma in Public Policy from the University of Victoria, New Zealand. She is a member of the new CABI One Health initiative and has previously contributed to other CABI books including chapters on food safety, disease surveillance, animal health policy, and disease ecology. Dr Cork has published a wide range of peer reviewed papers, government reports, and general interest articles.

Barbara Häsler is a One Health researcher and Professor in Agrihealth at the Royal Veterinary College (RVC) in London with expertise in animal health and One Health economics, evaluation, surveillance, food safety and food systems. She is involved in several One Health research and engagement activities focusing on connected and integrative thinking in One Health, the value of One Health (and how it can be measured) and learning activities to promote One Health competences in different learning communities. She also has a strong interest in the application of One Health skills in livestock and fish food systems.