Inclusion Criteria:  Provision of signed and dated informed consent form within 30 days of surgery. Stated willingness to comply with all study procedures and availability for the duration of the study. Male or female ≥ 18 years of age. Patient being admitted for a surgical procedure. Ability to tolerate a 4-minute non-painful nasal light illumination.  Exclusion Criteria:  Male or female <18 years of age. Inability to tolerate insertion of the nasal light illuminator due to nares size, shape, or anatomical variants. Known allergic reactions to components of the nasal disinfection treatment including methylene blue or chlorhexidine gluconate. Nasal obstructions precluding placement of light illuminator.