American Association of Feline Practitioners

Veterinary professionals passionate about the care of cats

Feline Disease and Medical Conditions

Feline Diseases

Feline Immunodeficiency Virus (FIV)

FIV was first discovered in 1986 when cats in a cattery started showing signs of immunodeficiency-like illnesses. FIV is found in cat populations worldwide.

Feline Infectious Peritonitis (FIP)

Feline infectious peritonitis (FIP) is a disease caused by a feline coronavirus (FCoV). Little is still known about this disease.

Feline Leukemia Virus (FeLV)

FeLV is one of the most common and important infectious diseases of cats, and is present in feline populations around the world.

Feline Chronic Renal Disease

The number of cats diagnosed with chronic renal disease increased nine-fold between 1980 and 2000 and now afflicts over 2 million felines, with 49% of cats over the age of 15 suffering from the disease.

Feline Heartworm Disease

Feline heartworm disease has been diagnosed in all 50 states. Wherever dogs are considered to be at risk for heartworms, cats are at risk as well. This is why it is so important for all cats to receive heartworm prevention.

Feline Hyperthyroid Disease

Feline hyperthyroidism is a result of excessive circulation of the active thyroid hormones thyroxine (T4) and triiodothyronine (T3). The cause of this increase in hormones in 95-98% of cats is due to a benign tumor (adenoma) of the thyroid gland. Hyperthyroidism can present with a multitude of other problems due to the changes that the increased thyroid levels cause.

Feline Lower Urinary Tract Disease (FLUTD)

Feline Lower Urinary Tract Disease (FLUTD) refers to several conditions that can affect the cat's urinary bladder and/or urethra.


Rabies is a viral disease that causes infection of the peripheral and central and nervous systems. The virus is transmissible between many species including domesticated and wild mammals, along with humans.

Zoonotic Disease

Zoonotic diseases, also known as zoonoses, are diseases that are transmissible from living animals to people.

Feline Medical Conditions


Diabetes mellitus refers to a condition in which the cat's pancreatic cells do not secrete enough insulin or the cat's cells lose their ability to respond to the action of insulin. Insulin acts to facilitate the movement of the glucose (sugar) from the cat's blood stream into the cells.


Obesity in cats has been linked to many health concerns such as diabetes, liver, and heart disease, to name a few. Fat cells have been shown to release pro-inflammatory mediators into the blood stream predisposing cats to inflammation which can intensify many conditions such as inflammatory bowel disease and asthma - two very common cat diseases.