Mosquitoes are, at the very least, irritating, and at the very worst, deadly. The Culex genus (house mosquitoes) can be carriers of West Nile virus, while the Aedes genus tend to carry yellow fever and Zika virus. They are also known to be carriers of malaria. However, the bites of mosquitoes in the U.S. generally only cause itchy bumps on the skin. In any case, there are few things you can do to decrease the mosquito population in and around your home.