Description: Among the many new topics included in this edition are oilfield hazards and tympanitic resonance, with reference to cattle. Addison's disease in dogs; nuclear medicine and radioisotopes; agonists; and vero cells. Entries for anaesthesia, abortion, BVD/mucosal disease of cattle, livestock production in the tropics, the health of camels, the feline urological syndrome (FUS), fungal disease, giardiasis sickness in horses, scrapie in sheep, genetic engineering and monoclonal antibodies, and viruses are among those which have been revised and enlarged. Information on health hazards of both stockmen and veterinarians, and public health and zoonoses generally, has been increased. Several new illustrations have been included. (G. P. W.)