Ehrlichiosis is caused by one of several different bacterium which are transmitted to humans by the Lone Star Tick (Ambylomma americanum), found primarily in the south-central and eastern U.S. Typical symptoms include fever, headache, fatigue and muscle aches over the first few weeks following an infected tick bite. Ehrlichiosis is treatable with antibiotics.
Rocky Mountain Spotted Fever**
Rocky Mountain Spotted Fever (RMSF) is a bacterial disease transmitted by the American Dog Tick (Dermacentor variabilis), Rocky Mountain Wood Tick (Dermacentor andersoni), and the Brown Dog Tick (Rhipicephalus sangunineus) in the U.S. The Brown Dog Tick and other tick species are associated with RMSF in Central and South America. Symptoms of RMSF can include fever, headache, abdominal pain, vomiting and muscle pain. A rash may also develop, but is often absent in the first few days. Some patients, however, never develop the rash. RMSF can be very serious, even fatal, if not treated with antibiotics in the first few days of symptoms.