AIDS	Acquired immunodeficiency syndrome. A clinical syndrome of diseases associated with human immunodeficiency virus infection (HIV).
ASD	Atrial septal defect. A hole in the septum or wall that separates the left and right atria in the heart
AZT	Azidothymidine, also called zidovudine. A drug sold under various brand names used in the treatment of some viral diseases of humans and animals
CRF	Chronic renal failure. The progressive deterioration of kidney function in cats over time, most often associated with old age but occasionally seen with specific kidney diseases.
CPR	Cardiopulmonary resuscitation. Life-saving procedure that combines heart massage and assisted breathing (artificial respiration).
CRT	Capillary refill time. A method of assessing the cardiovascular system in an injured or ill animal.
ELISA	Enzyme-linked immunosorbent assay. A test methodology commonly employed for the detection of many diseases in human and veterinary medicine, such as detection of certain viruses.
FCV	Feline coronavirus. The general name for a common virus of all cat species that has both benign (FECV) and disease-causing forms (FIPV).
FECV	Feline enteric coronavirus. The benign form of felinecoronavirus that infects the intestinal tract of cats and is especially common in multicat homes or shelters.
FeLV	Feline leukaemia virus. A retrovirus that is the leading cause of contagious disease and death in cats worldwide.
FIP	Feline infectious peritonitis. A fatal disease of cats caused by a feline coronavirus (FIPV) that has no effective treatment and no definitive test detection.
FIPV	Feline infectious peritonitis virus. The mutated form of feline coronavirus that is capable of causing feline infectious peritonitis.
FIV	Feline immunodeficiency virus. A lentivirus of cats found throughout the world that can cause depression of the immune system and is mainly spread through bite woulds.
FLUTD	Feline lower urinary tract disease. A general name for the various causes of symptoms associated with diseases of the bladder and urethra of cats.
FPV	Feline panleukopenia virus. The feline parvovirus, also called feline distemper, which infects the nervous system, intestinal tract, and bone marrow of cats, especially kittens.
FUS	Feline urological syndrome. An older name for FLUTD.
FVR	Feline viral rhinotracheitis. The disease caused by the respiratory virus, feline herpesvirus type 1.
HCM	Hyperrophic cardiomyopathy. The most common disease of the heart muscle found in cats; known to be inherited in some breeds.
HIV	Human immunodeficiency virus. A human virus related to FIV that is the cause of acquired immunodeficiency syndrome in people.
IBD	Inflammatory bowel disease. A common disease that may affect any part of the digestive tract in cats and cause vomiting or diarrhea.
IFA	Immunofluorescence assay. A type of test methodology employed to detect some infectious diseases in cats and other species.
IN/IO	Intranasal/Intraocular. A method of vaccination in which drops are applied to the nose and eyes.
KV	Killed virus. A type of vaccine in which the virus is killed or inactivated so that it cannot cause disease.
MLV	Modified live virus. A type of vaccine in which the virus is weakened or attenuated so that it cannot cause serious disease.
PDA	Patent ductus arteriosus. A birth defect of the heart sometimes seen in kittens that can be surgically repired.
PKD	Polycystic kidney disease. An inherited disease that causes fluid-filled cysts to form in the kidneys and may be associated with kidney failure.
PRAA	Persistent right aortic arch. A type of heart defect occasionally seen in kittens that can be surgically repaired.
VSD	Ventricular septal defect. A hole in the septum or wall that divides the right and left ventricles of the heart.