Type-I lepra reaction is commonly seen in:
type 1 reaction /reversal reaction is a delayed hypersensitivity reaction associated with a rapid increase in specific CMI activity against M.leprae. It usually occurs in borderline types of leprosy, (BB>BT >BL)characteristically associated with immunological instability. Page no.2046Reference IADVL's concise textbook of dermatology
Histoid Leprosy
Lepromatous Leprosy
Borderline tuberculoid leprosy
Polyneuritic leprosy
Bacterial infections