Humans, Dogs, Cats, Cows, Horses, Sheep, Goats, Deer, and other Ruminants


  • Ehrlichiosis is a disease caused by one of several species of bacteria (Ehrlichia, Anaplasma, and Neorickettsia) that can be transmitted via the bite of an infected tick
  • The lone star tick (Amblyomma americanum) is the main vector of two of these types of bacteria
  • In infected humans, symptoms occur within a week or two of being bitten by an infected tick and may include fever, headache, fatigue, and muscle aches
  • Infected animals may present with fever, anorexia, depression, stiffness and reluctance to walk, and coughing