Along with mosquitoes, ticks, mice, and other carriers are likewise surviving milder winters and fanning out across the country, spreading an encyclopedia of pathogens: Lyme disease, Rocky Mountain spotted fever,
equine encephalitis, St. Louis encephalitis,
anaplasmosis, and babesiosis, a once uncommon malaria - like infection in the United States.
Although some tick - borne diseases such as
equine granulocytic
anaplasmosis and
equine piroplasmosis are well established, others, including
equine bartonellosis and Lyme disease, have remained poorly characterized.