Rickettsiosis is an infectious disease caused by bacteria from the genus Rickettsia. These bacteria are typically transmitted to humans through bites from infected ticks, fleas, or lice. Symptoms often include fever, headache, rash, and muscle pain, which can vary in severity depending on the specific type of rickettsiosis. Diagnosis is usually based on clinical symptoms and history of exposure to vectors. Treatment typically involves antibiotics, such as doxycycline, which are most effective when administered early in the course of the illness. Preventive measures include avoiding areas with high tick populations and using insect repellent.