Feline leukemia virus is a retrovirus that infects cats. FeLV can be transmitted from infected cats when the transfer of saliva or nasal secretions is involved.
What Are the Feline Leukemia Symptoms? FeLV infections can be tricky for two main reasons: the virus attacks many systems in the body, and the signs vary depending on which system is affected. It is one of the most common causes of cancer in cats and can cause blood disorders.

Symptoms of Feline Leukemia Virus. Cats infected with FeLV may exhibit one or more of the following symptoms: Pale gums. Yellow color in the mouth and whites of eyes. Enlarged lymph nodes. Bladder, skin, or upper respiratory infections. Weight loss and/or loss of appetite.

Feline Leukemia Virus (FeLV) is a common but preventable virus that can affect almost all cats. Dr. Boldan shares how FeLV weakens a cat's immune system, symptoms, and how the feline leukemia virus vaccine can be life-saving.

As a cat parent, hearing the words feline leukemia can be frightening. This serious viral infection harms cats worldwide, affecting between 2-3% of all cats in the U.S. 1. This deadly virus doesnt just make cats sick it affects their immune system and can shorten their lives.