A pаtient whо's а rаncher presents with a lesiоn (sоre) on their hand that looks blackened, even charred. The patient says that the lesion is painless, and that they're here for COVID-19 testing as they've developed a persistent cough. The patient also says that several of their sheep are having trouble breathing and wonders if sheep can get COVID-19. Gram-staining of material cultured from the hand lesion reveals Gram-positive bacilli that contain clear, non-stained areas. Which of the following microbes is most likely to be the cause of your patient's lesion?