Ian R. Tizard, BVMS, BSc, PhD, DSc (Hons), DACVM, is a Diplomate of the American College of Veterinary Microbiologists and a University Distinguished Professor Emeritus of Immunology, Department of Veterinary Pathobiology, The Texas Veterinary Medical Center at Texas A &M University (TAMU), College Station, Texas, USA. Dr. Tizard earned his Bachelor of Veterinary Medicine and Surgery from the University of Edinburgh, Scotland, in 1965. He then completed a Bachelor of Science in Pathology and a PhD in Immunology. After completing his studies, Dr. Tizard became a Post-Doctoral Fellow at the University of Guelph, where he remained as a professor until 1982 when he moved to TAMU. Dr. Tizard wrote the first standardized textbook on Veterinary Immunology in 1977. This text, now in its 11th edition, is used worldwide, and has played a major role in establishing Immunology among the key disciplines.

SECTION 2: MAMMALIAN ORDERS 11. Monotremes: Echidnas and platypus 12. Marsupials: Koalas and kangaroos 13. Placentals: Cetartiodactyla: camels and llamas 14. Cetartiodactyla: Pigs and peccaries 15. Ruminants: Cattle, and sheep 16. Cetaceans: Dolphins and whales 17. Chiropterans: Bats 18. Carnivora 19. Perissodactyls: Horses 20. Lagomorphs: Rabbits 21. Rodents: Rats and mice 22. Primates: Monkeys, apes, and humans 23. Paenungulates: Elephants and sirenians 24. Xenarthrans: Sloths and anteaters 25. Synthesis