LCT and nosocomial infection: Furthermore, reduced RNAIII expression level was observed in strains other than LAC, including M1K051 (Agr-QS subgroup I) and M1K155 (Agr-QS subgroup II) isolated from human skin, and CN02 (Agr-QS subgroup III) isolated as a nosocomial infection when cultured in the presence of 100 μM physalin H (Figure 1F).