What Cat Diseases Are Contagious To Other Cats?

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As a cat parent, it’s important to recognize the signs and symptoms of common illnesses so it is possible to seek veterinary assistance for your feline friend in a timely fashion if needed. Continue reading for information about diseases that often impact cats.

What cat diseases are contagious to other cats? Here the list:


Spread by infected mosquitoes, heartworm is increasingly being recognized as an underlying cause of health issues in domestic cats. Cats are an irregular host for heartworms. Despite its title, heartworm primarily causes lung disease in cats. It’s an important concern for any cat owner residing in areas densely populated by mosquitoes, and avoidance ought to be discussed with a veterinarian.

Many pet parents eagerly open their windows to enjoy the weather during the summer months. Regrettably, unscreened windows pose a real threat to cats, who drop from them so frequently that the veterinary profession has a title for the criticism–High-Rise Syndrome.


Rabies is a viral disease which affects the brain and spinal cord of all mammals, including cats, dogs, and people. There is a good reason that the very word “rabies” evokes fear in people–after symptoms appear, rabies is near 100% fatal.



Even though the name implies otherwise, ringworm is not due to a worm at all–but a parasite that can infect the skin, nails, and hair. Not uncommon in cats, this highly infectious disease may result in rough, circular areas of hair loss with central red rings. Also referred to as dermatophytosis, ringworm frequently spreads to other pets in the family–and to people, also.

A cat’s upper respiratory tract–the nose, sinus and throat area–is vulnerable to infections brought on by an assortment of viruses and germs.


Cancer is a class of diseases where cells grow uncontrollably, invade surrounding tissue and can spread to other regions of the body. Much like people, cats can get several types of cancer. The disease could be localized (confined to one place, like a tumor) or generalized (spread throughout the body).


Diabetes in cats is a complex disorder caused by either a lack of the hormone insulin or an insufficient response to insulin. Following a cat eats, her digestive system divides food into different components, including sugar–that is carried to her cells by insulin. When a cat doesn’t produce insulin or can’t use it normally, her glucose levels elevate. The end result is hyperglycemia, which, if left untreated, can cause many complex health problems to get a cat.

Feline Immunodeficiency Virus (FIV)

Even though the virus is slow-acting, a cat’s immune system is severely weakened when the disease takes hold. This creates the cat susceptible to different secondary infections. Infected cats getting supportive medical care and kept in a stress-free, indoor environment can live relatively comfortable lives for months to years before the disease reaches its chronic stages.

First discovered in the 1960s, feline leukemia virus is a transmittable RNA retrovirus that may seriously impair a cat’s immune system. It is among the most frequently diagnosed causes of death and disease in domestic cats. Because the virus does not always manifest symptoms straight away, any new cat entering a family–and any ill cat–should be tested for FeLV.


Cats can acquire many different intestinal parasites, including some that are generally called “worms.” Infestations of intestinal worms can cause many different symptoms. Occasionally cats demonstrate few to no outward signs of disease, and the infestation may go unnoticed despite being a potentially serious health issue. Some feline parasitic worms are risks for human health also.

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