SDHD and leprosy: Santos et al. in another Brazilian study, analyzed 361 contacts with positive anti-PGL-1 that were asymptomatic, identifying the mycobacterium in the PCR test of the skin biopsy in 35% of the cases and alterations in the electroneumyography in 23.5%, concluding that screening with anti-PGL-1 can be useful to identify latent cases of leprosy (7).