FCEM2-0268

A 60-year-old woman originally from South Sudan has developed a chronic skin condition. She has widespread areas of both hyper- and hypopigmented skin along with areas of skin atrophy and lichenification. The hypopigmented areas are mostly confined to her forearms. Over the past few years, her vision has gradually deteriorated, and she has now been registered blind.
What is the SINGLE most likely causative organism?