The Western Treehole Mosquito, Aedes sierrensis, is a known carrier of Canine Heartworm Disease. The treehole mosquito are most commonly associated with oak and madrone trees in this area, as these trees have a greater tendency for cavity formation. These cavities are capable of holding water captured from rain, snow, or lawn sprinklers, creating conditions hospitable for mosquito larvae.
Positive heartworm cases are reported by area veterinarians each year. It is recommended that all dogs be tested for canine heartworm. Further information can be obtained from your local veterinarian.