Feline panleukopenia, commonly known as feline distemper, is a viral infection affecting cats, caused by feline parvovirus, a close relative of canine parvovirus. It is not related to canine distemper. Panleukopenia is primarily spread through contact with an infected cat's bodily fluids, feces, or fleas. Sometimes it is spread through contact with bedding, food dishes, or even by handlers of infected cats. Other symptoms include depression, lethargy, loss of appetite, fever, vomiting, loss of skin elasticity due to dehydration, and self-biting in the tail, lower back and back legs.