While all insects can be a nuisance to you and your family, mosquitoes can be downright detrimental. They bite – drawing blood – which causes welts and itching that can be quite uncomfortable. But their bites can also cause allergic reactions and even spread serious diseases that can be very harmful to humans. Diseases such as West Nile and Zika Viruses, Dengue Fever and Encephalitis can be transmitted by mosquitoes. They can also infect our pets with serious diseases as well.