Pig herds are getting larger and clinical disease risks can become economic disaster;
Sub-clinical infections erode food conversion efficiency, hog growth rates & swine welfare;
Isowean, segregated early weaning (SEW), medicated early weaning (MEW) & Multiple site production can help
- Multi-site Rearing Systems
- Exclusion and Elimination of Microbes
- Immunity, Pig Performance, and the Emergence of Disease
- Control of Common Infectious Swine Diseases
- Policy Decisions and Opportunities for Owners and/or Senior Management
- Management of Multi-site Rearing Systems
- Breeding Stock Production
- Standardized Nomenclature, Alphanumeric Notation, and Diagrams
- Future Rearing Systems and Facilities
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Swine production has undergone a worldwide revolution in recent years. A contributing factor has been the introduction of the practice of multiple sites for pig production. "Multi-Site Pig Production is the first comprehensive description of the most profound changes that have occurred in swine production methodology in many years," says R.D. Glock, head of the Arizona Veterinary Diagnostic Laboratory.
Throughout the book, Harris gives his readers the basis for "isowean" principle, the building block of Multi-Site Pig Production methodologies. He explains the advantages and disadvantages of this new technology that most recently constructed hog farms utilize. Since isowean was developed specifically for elimination of infectious diseases, Harris emphasizes many aspects of disease control throughout the text.
Hank describes and compares the many variants of this technology, such as Isowean, Segregated Early Weaning and Medicated Early Weaning, and describes how they can be used to control or reduce severity of the nine major diseases: atrophic rhinitis, pleuropneumonia, pseudorabies, swine dysentery, TGE, mycoplasmal pneumonia, PRRS, Glasser's disease and streptococcal meningitis.
Anyone interested in swine production will benefit from chapters on policy decision making, immunity, breeding stock production, and pig performance. The book also includes standard nomenclature, notations, and diagrams to help students and professionals alike and can be read as a chapter specific reference for quick accessibility. Those seriously interested in the swine industry will find this book useful for its many applications.
D. L. ("Hank") Harris, DVM, PhD, is professor, Department of Microbiology, College of Agriculture, and Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, at Iowa State University. Dr. Harris returned to academia after serving as vice president of veterinary services for Pig Improvement Company, Inc., Franklin, Kentucky, USA.
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Forward (by Dr. Bob Glock)
Multi-site Pig Production is the first comprehensive description of the most profound changes that have occurred in swine production methodology in many years. Techniques involving various forms of multi-site rearing have recently evolved. Dr. Hank Harris is singularly qualified to author this work because he has played a pivotal role in the initiation of techniques that are being applied throughout the world. The term isowean evolved from medicated early weaning (MEW), or isolated weaning, and was first used by Hank Harris. Its copyrighted status has been rescinded because it has become a common industry term.
Terminology regarding multi-site rearing techniques has been somewhat disorderly and confusing. Information in this book provides final definition for a variety of terms that are being used to describe swine production methods. Various industry publications and glossaries have been considered in the formation of a framework for precise communication. A system of nomenclature is provided to facilitate more accurate future interactions between participants in swine production systems that involve multiple sites, buildings, and rooms with different age groups and functions.
Multi-site Pig Production is designed for use by anyone interested in swine production. This includes students as well as production personnel. The writing style is easily understood and the book is arranged so it can be read in its entirety or it can be used as a chapter-specific reference. (However, no one should attempt to use this book without addressing the sections on definition of terms (Chapters 1 and 9).
The relaxed style of this book reflects the personality of the author, who has managed throughout his professional career to remain informal while providing profoundly innovative ideas. The reader may be challenged to seek further applications of some of the concepts that are presented. Major changes in disease management and, more importantly, in profitability have already occurred, but innovative applications of the information provided will result in even more significant applications. This book is a necessity for those seriously interested in the economic future of the swine industry.
R. D. Glock, D.V.M., Ph.D.
University of Arizona Veterinary Diagnostic Laboratory
Preface (by Hank Harris)
The thought of writing this book occurred to me for the first time while I was chairing a mini-symposium on multi-site production organized by Barry Wiseman and held prior to the Al Leman Swine Conference in 1997. The rather large amphitheater was filled to standing-room-only and the questions by the participants carried on well past the cocktail hour. As the symposium progressed, it became rather obvious that considerable confusion existed regarding terminology of multi-site farms and the elimination of infectious agents via isowean. In particular, Howard Hill and I couldn't even agree on how to describe the Murphy Family Farm rearing system (a system that I helped design and that he works in every day!). Several veterinarians in the room expressed the belief that multi-site production exacerbates the severity of porcine reproductive and respiratory syndrome (PRRS) outbreaks in pig farms. My reactions were...
Shortly after the mini-symposium, I was interviewed for a Morrison Group tape recording (see "From MEW to Multi-site Isowean Production," Chapter 1). During the interview, those same reactions occurred plus more questions:
Why is there so much confusion regarding a rather simple concept?
Pigs weaned in isolation away from adult swine have fewer infectious agents and grow faster on less feed.
Why can't the other speakers and I answer all the questions posed by the participants?
Does multi-site production really increase the severity of disease in some situations or is it simply due to other factors related to management and biosecurity?
How many others associated with the swine industry are having difficulty in successfully implementing multi-site technology?
Are animal scientists, geneticists, pig farmers, building companies, lenders, feed dealers, veterinarians, and students communicating effectively regarding multi-site production systems?
Why are so many new and renovated farms now using multi-site isowean technology?
The motivation to start (and finish) this book came from a fear that the Isowean Principle was correct in theory but not in practice. Was it possible that isolated weaning (isowean) should not be the basis for how most pigs in the world will be reared well into the next century? While attempting to answer this question, I learned many things by collecting information from the literature and by interviewing veterinarians and pork producers. As expected, not all of my original hypotheses were correct regarding the application of the Isowean Principle. But overall, I became convinced that there are many benefits to be gained by any-sized pork production operation if multi-site isowean technology is properly implemented.
Thus, I felt compelled to explain the evolution, advantages, pitfalls, and practical application of modern-day multi-site pig production.
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