Q. A 45-year-old farmer presents with a three-day history of a painless, raised, black eschar on his right forearm, accompanied by fever, chills, and headache. He reports handling livestock recently. The patient's medical history is unremarkable, and he has not traveled internationally in the past year. On physical examination, the lesion is 3 cm in diameter, with surrounding brawny edema but no significant lymphadenopathy. The patient is hemodynamically stable. Initial laboratory tests reveal a mild leukocytosis. No further laboratory tests have been performed. What would be the most appropriate initial management strategy for this patient?