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.
Cats with leukemia may exhibit symptoms such as loss of appetite, weight loss, lethargy, swollen lymph nodes, anemia, infections, easy bruising, or bleeding. These symptoms can vary greatly in severity and may not all be present in every cat with leukemia.
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.

Feline leukemia is not easily recognizable by symptoms alone since there are so many possible signs of the disease. Cats that have been infected with the feline leukemia virus may exhibit a variety of symptoms including weight loss, lack of appetite, and persistent diarrhea.
Burmese cat with a blue collar. Feline Leukemia Symptoms. Cats in the early stages often dont show any signs of the virus. However, as time goes on, the infected cats health may begin to decline. Symptoms of FeLV include

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.