system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Rickettsia is treated in all ages by which drug?
assistant
The correct answer is  Ans. A. Doxycycline* The drug of choice for the treatment of both children and adults with rocky mountain spotted fever is doxycycline, except when the patient is pregnant or allergic to the drug.* Because of the severity of RMSF, immediate empirical administration of doxycycline should be strongly considered for any patient with a consistent clinical presentation in the appropriate epidemiologic setting.* Treatment with chloramphenicol, a less effective drug, is advised only for patients who are pregnant or allergic to doxycycline.* Beta-lactam antibiotics, erythromycin, and amino glycosides have no role in the treatment of RMSF, and sulfa-containing drugs are likely to exacerbate this infection. There is little clinical experience with fluoro- quinolones, clarithromycin, and azithromycin, which are not recommended.