Veterinary Immunology 10E - Original PDF
نویسندگان: Ian Tizard BVMS, PhD, ACVM (Hons), DSc (Hons)
خلاصه: This textbook was first published in 1977, at a time when veterinary
immunology was relatively new and poorly understood.
Nevertheless, it was recognized, even then, that immunology held
the key to many of the significant issues in veterinary medicine. The
importance of immunology has not declined since then, except
among those tasked with establishing college curricula. The decline
in basic science instruction at colleges of veterinary medicine in
favor of more clinical training has resulted in graduating a
generation of veterinarians whose knowledge of immunology is
minimal. Yet immunology continues to be a key science. It is central
to our understanding of major veterinary issues such as
vaccination, cancer, infectious diseases, and allergies.
It has been tempting to dilute the contents of this text and its
associated website to conform to current curricular trends. I have
resisted this. Because the amount of knowledge of immunology
required to obtain a veterinary degree has been progressively
reduced, the need to document the science in depth has
correspondingly increased. This book therefore continues to grow
as the result of opening up new, exciting areas of the science.
Veterinarians need to know much of this if they are to practice
cutting-edge science in the 21st century. Read it, study it, and enjoy
its wonderful complexity.
Over the many years that this textbook has been published we
have seen many changes in the science of immunology. In most
cases, these changes have been gradual in nature as investigators
add detail to existing knowledge. Occasionally, however, major
leaps are made that effectively revolutionize the discipline—socalled
paradigm shifts. For example, in the late 1990s, the concept of
innate immunity was accepted. Inflammation and other processes
were finally recognized as being essential components of the immune system and the dual innate and adaptive immune systems
were shown to complement each other. It is interesting to note that
this was not a new discovery but a new way of looking at well
recognized processes.
This new edition also reflects revolutionary changes in the way
we think of immunology. Like the concept of innate immunity,
these changes are not a result of a previously unknown process but
a belated recognition of something known about since the dawn of
microbiology, the body's normal microbiota. New methodologies
and intensive studies have revealed that many body processes,
especially immunity, are regulated by the diverse microbiota that
colonizes all body surfaces. Much of immunology has had to be
reassessed in the light of this new knowledge. Both innate and
adaptive immunity are regulated by those organisms, especially
bacteria, that live in the intestine and respiratory tract and on the
skin. Many previously unexplained phenomena have now been
shown to depend on the normal microbiota. As a result of this new
information, the reader will encounter the microbiota at every turn
in this book, plus a completely new chapter on the subject.
The second new chapter deals with allergic diseases. For many
years, these were readily explained by the production of IgE against
allergens. The most recent information, however, has demonstrated
that allergies are much more complex than this. For example, atopic
dermatitis, one of the most common conditions seen by small
animal veterinarians, is likely a syndrome with multiple complex
causative factors. As a result, allergic and inflammatory diseases
deserve a new chapter.
These additions cannot, however, hide the fact that the rest of
immunology also continues to move forward. Thus the mechanisms
by which the body rejects gastrointestinal helminths has been
clarified with the discovery of the importance of tuft cells and
interleukin-33. Associated with this has been the recognition of the
complex nature of innate lymphoid cells and their subpopulations.
Some of these advances can be considered routine, such as the
identification of new cell surface molecules and many new
cytokines. New disease syndromes such as swine SCID, bovine
neonatal pancytopenia, and immune-mediated keratoconjunctivitis
are now described, and the pathogenesis of others such as atopic
dermatitis, type I diabetes mellitus, equine laminitis, and systemic
lupus are shown to be more complex than previously believed.
New advances in therapy are covered, including the introduction
of immune checkpoint therapy in cancer and the use of monoclonal
antibody therapy and intravenous immunoglobulin therapy for
immune-mediated diseases. The exciting new developments in the
use of nanoparticles in vaccines and as adjuvants are now
described. The significant roles of vitamins A and D as well as the
aryl hydrocarbon receptor in immunity are also recognized.
Advances in basic science that are now discussed include new
findings on the structure and genetics of bovine antibodies,
epigenetics, RNA interference, microRNA, macrophage
polarization, and type 1 and type 2 immune responses.
I make no apologies for the size and complexity of this text.
Immunology is a complex subject that has a direct bearing on many
of the most important areas of veterinary medicine. Students, as
well as graduate veterinarians, ignore it at their peril.
Finally, readers are strongly encouraged to visit the Evolve
website for this text. The site is also constantly evolving and
improving. In it you will be able to find a collection of more than
450 multiple-choice questions (with the answers!) keyed to each
chapter; a set of flashcards also linked to chapters; all the text
figures available as PowerPoint slides; and a collection of
animations kindly provided by Dr. Abul Abbas, as well as brand
new animations created for this textbook, designed to clarify some
complex processes and pathways where still figures are inadequate.
All the chapter references are keyed to PubMed. There are also new
hand-outs that students can print off and use as a reference, should
you wish. It is my hope that these assets will help you remain
current in this rapidly expanding and exciting field.