ROSH Geriatrics Practice Test

A rash on the wrists and palms, particularly following a camping trip, raises a strong suspicion for Rocky Mountain spotted fever. This condition is caused by the bacterium Rickettsia rickettsii and is transmitted through tick bites, which are common in camping and outdoor activities.

The characteristic rash associated with Rocky Mountain spotted fever typically begins as small, flat, pink spots (macules) that can develop into larger, raised bumps. It often starts on the wrists and ankles before spreading to the trunk and other areas. The timing of symptoms, including the rash, fever, and headache, usually occurs 2 to 14 days after a tick bite, fitting well with the timeline of a recent camping trip.

In contrast, the other conditions listed might present differently or have additional characteristic signs that would help distinguish them from Rocky Mountain spotted fever. For example, cellulitis is localized skin infection usually marked by warmth, swelling, and redness, but it's not typically associated with rashes on the palms and wrists. Syphilis can cause a rash but it typically presents with systemic symptoms and can affect areas other than the wrists and palms. Lyme disease is associated with a characteristic "bull's-eye" rash (erythema migrans) and typically occurs after