Recently, Bah et al. observed that isolates from skin infection in low income countries harbored only a few DNases (24% with spd1, 2% with spd3) in contrast to strains in high-income countries (56% spd1, 70% spd3, 5% sda1, 16% sda2, 16% sdn, and 7% spd4) [67]. This evidence concerns the gene SDAD1 and skin infection.