The main cytokine, involved in erythema nodosum leprosum (ENL) reaction is-
The main cytokines responsible for type 2 leprosy reactions are interleukin 1 and tumour necrosis factor alpha. iadvl textbook of dermatology, page 2049
lnterleukin - 2
Interferon - gamma
Tumor necrosis factor - alpha
Macrophage colony stimulating factor
Bacterial infections