Michael Day's Veterinary Immunology: Principles and Practice is the adopted text in numerous veterinary schools throughout the world. Updated and revised by Brian Catchpole and Harm HogenEsch with advances in knowledge since 2014, this third edition reflects the rapid developments in the field internationally, while preserving the strengths of Day's original writing. It adds numerous case studies demonstrating the clinical context across companion and farm animals.The textbook presents information on commonly used diagnostic test procedures and includes learning objectives at the start and key points at the end of each chapter, standard symbols in diagrams throughout the text to provide continuity, clinical examples and clinicopathological figures throughout, and a glossary of terms and list of commonly used abbreviations. Short animations are viewable via the Support Materials tab on the Routledge webpage, adding a new element of practical application. Exploring the immunological principles of both large and small animals, the book emphasizes immunological principles while applying them to disease processes and to clinical practice. It provides a practical textbook for veterinary students and a handy reference for practitioners.