Cat scratch fever commonly presents with which manifestation?

• A. Localized swelling without a rash
• B. Generalized red rash caused by Bartonella spp.
• C. Painless oral ulcers
• D. Severe diarrhea

Answer: (B)

Cat scratch fever is driven by infection with Bartonella henselae, and the hallmark is tender, swollen lymph nodes in the region draining the scratch site. This regional lymphadenopathy reflects the bacteria traveling to nearby lymph nodes and triggering an inflammatory response there. Fever and malaise can occur, but the key feature students rely on is the localized swelling rather than a widespread rash. A generalized red rash is not the typical presentation of cat scratch disease, and painless oral ulcers or severe diarrhea are not characteristic findings. So, the manifestation that best fits is localized swelling of the lymph nodes near where the scratch occurred.