Presence of gpr in M. mucogenicum, M. goodii, and M. simiae, which are emerging pathogens in nosocomial infections (van Ingen et al., 2008; Adekambi, 2009; Parikh and Grant, 2017; Salas and Klein, 2017), raises clinical significance of our findings and possibly offers insight into resistance of these species to peroxide-mediated sterilization of surgical and medical equipment. Here, ALDH18A1 is linked to nosocomial infection.