Rickettsia spp. are Gram-negative, obligate, intracellular bacterial pathogens. Most rickettsial species have a life cycle that involves both an arthropod vector and a vertebrate host. The high ...

Ehrlichiosis is a disease caused by tick bites carrying rickettsial bacteria. Symptoms include fever, chills, and muscle aches, and can appear within a week or more after a tick bite. Antibiotics are ...