A 23-year-old man presents with fever, weight loss, malaise, abdominal pain and myalgias. Workup reveals that the patient has polyaeritis nodosa. Which of the following is associated with this form of vasculitis?

Although the significance remains unclear, 30% of patients with polyaeritis nodosa have serum antibodies to the hepatitis B virus. Arsenic is associated with the development of angiosarcoma. Chlamydia pneumonia has been implicated in the development of atherosclerosis. KSHV, HHV-8, causes Kaposi sarcoma in individuals infected with human immunodeficiency virus.