American Dog Tick (Eastern US) Dermacentor variabilis Location: Eastern US Disease(s): Rocky Mountain Spotted Fever, Tularemia Symptoms: Fever, rash, headache, GI distress Diagnosis: PCR, serology, skin biopsy Treatment: Doxycycline, antibiotics American Dog Tick (Western US)Dermacentor similis Location: Western US, California Disease(s): Rocky Mountain Spotted Fever, Tularemia Symptoms: Fever, rash, headache, GI distress Diagnosis: PCR, serology,