Từ điển thú y vần T | T-Cells LYMPHOCYTES from the thymus gland concerned with cell-mediated immunity. See IMMUNE RESPONSE. T2 Toxin This fungal toxin may poison cattle or poultry eating stored corn containing the fungus Fusarium tricinctum. In cattle the toxin may cause multiple haemorrhages and sometimes death in poultry there may be mouth lesions. Tachycardia Tachycardia is a disturbance of the heart s action which produces great acceleration of the pulse. Tachypnoea An increase in the rate of breathing due to some pathological condition. See BREATHLESSNESS PARAQUAT POISONING. Taenia see TAPEWORMS Tail Amputation of Amputation of the tail docking is or has been undertaken for a variety of reasons. In the UK the Royal College of Veterinary Surgeons has ruled that docking a puppy s tail is an unethical procedure except when it is done for prophylactic or therapeutic reasons. Docking by lay persons is illegal. In cattle amputation of the tail is illegal except following injury and must except in an emergency be undertaken by a veterinary surgeon. Pigs tails are often docked to prevent tail-biting. Lambs tails are docked to prevent faecal soiling and fly strike see under DOCKING LAW WELFARE CODES . Tail-Biting In pigs this vice can be of great economic importance. There are various reasons why it occurs boredom absence of bedding and overcrowding floor space of less than m2 5 square feet per pig are regarded as conducive to tail-biting. High temperature and humidity are possible causes. Bitten tails require amputation or dressing if pyaemia is to be prevented. Tail sores in pigs These may follow tail-biting by 1 or 2 pigs out of a large batch and if untreated can lead to pyaemia. In 6 months out of 135 pig carcases condemned in an Oslo abattoir 56 were affected with pyaemia and of these 43 had tail sores. Talfan Disease Teschen Disease Porcine Viral Encephalomyelitis This disease of pigs was first recognised in the Czech Republic and occurs throughout Europe. In the UK it was made a
