50 years-old woman undergoing chemotherapy for metastatic breast cancer is seen by her oncologist because of itchy, burning blisters on her rib cage that began 3 days earlier as a tingly or numb sensation. Physical exam reveals an otherwise healthy patient with vesicular eruptions along a thoracic dermatome.What is your diagnosis? And causative organism?

50 years-old woman undergoing chemotherapy for metastatic breast cancer is seen by her oncologist because of itchy, burning blisters on her rib cage that began 3 days earlier as a tingly or numb sensation. Physical exam reveals an otherwise healthy patient with vesicular eruptions along a thoracic dermatome.What is your diagnosis? And causative organism?