Mosquito activity in the United States is heavily dictated by regional climate variations. While the deep South manages year-round mosquito populations and the arid West sees isolated activity, the Northeast and Midwestern transitional zones experience highly concentrated seasons.
Pittsburgh, Pennsylvania, and the greater Allegheny County area feature a humid continental climate. This is characterized by cold winters that pause mosquito breeding, followed by wet springs and warm, highly humid summers.
While humans often view mosquitoes as a temporary nuisance that causes itchy welts, the stakes are significantly higher for pets. A dense fur coat does not render dogs and cats immune; mosquitoes frequently target exposed areas such as the nose, ears, underbelly, and inner legs.
The most severe threat to local pets is heartworm disease. When a mosquito bites an infected wild animal (such as a coyote, fox, or untreated domestic animal), it ingests microscopic heartworm larvae. The mosquito then acts as an intermediate host, transmitting the larvae to the next dog or cat it bites.
Effective mosquito management requires an integrated approach that addresses both the local environment and direct pet care.
Mosquitoes require stagnant water to complete their life cycle, with eggs capable of hatching in just a few days during Pittsburgh’s warm summer months. Property management is the first line of defense:
