It's probably safe to assume that everyone finds mosquitoes annoying. In certain parts of the world, they move beyond the annoying category into the dangerous category as they spread diseases like malaria and dengue fever. While these diseases are nothing to sneeze at, at least we can take comfort in knowing that mosquitoes do not spread Ebola. Neither do fleas or ticks. In fact, only mammals have been shown to be infected with and able to spread Ebola.
While we don't know with total certainty, scientists hypothesize that fruit bats in Africa are the most likely carriers of the disease. How the virus gets from the bats to humans and other mammals is still a mystery, however. Bats have been associated with known index cases (the first human infected in an outbreak) of Ebola in past outbreaks of the disease, but the exact connection to humans is still unclear.
If mammals can be infected with the virus, does that mean you need to worry about your cat or dog getting infected, or even infecting you? Nope. Even in areas of outbreak where Ebola has affected a large number of people, there have been no reports of dogs or cats getting sick from the disease [source: CDC].