That the IL-17 release was also influenced by the leprosy spectrum was indicated by BT patients who showed significant increase in expression of IL-17 isoforms: IL-17A (p<0.0002), IL-17C (p<0.003), IL-17D (p<0.003) and IL-17F (p<0.0001) as compared to the multibacillary LL patients. The gene discussed is IL17F; the disease is leprosy.