A 30-year-old human immunodeficiency virus (HlV)-positive man presents with 1 week of fever and malaise. On his forearm there is a 2-cm round, vascular, nontender, friable exophytic lesion. What is the diagnosis? Pathogen? Appropriate treatment?
Answer: Bacillary angiomatosis caused by Bartonella Oral erythromycin, doxycycline, or azithromycin
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