Squirrel pox
Squirrel pox, also called squirrel fibroma, is caused by a poxvirus called squirrel fibroma virus, which is related to other poxviruses. This disease is characterized by varying sizes and numbers of wart-like growths or fibromas on the skin of squirrels. In Wisconsin, gray squirrels with pox-like lesions are routinely reported in small numbers each year. Juvenile squirrels may be more susceptible.
TRANSMISSION
Biting insects, such as mosquitos, are likely the primary route of transmission between squirrels.
CLINICAL SIGNS
Affected squirrels can have growths of varying size and number on the skin. These growths can appear on any part of the skin.
DISEASE MANAGEMENT
Squirrels with fibromas generally recover as the growths resolve and disappear. In severe cases, the growths can interfere with the squirrel’s ability to see, eat or move and can lead to starvation or increased risk of predation. Eliminating sources of standing water where mosquito vectors breed can help reduce the chance of transmission in the wild.
PUBLIC HEALTH
The squirrel pox virus is not known to infect people.