We investigate the ability of photodynamic inactivation to inactivate bacteria and algae.
Methylene blue and red light alone had no microbicidal effects.
S. dysgalactiae, S. aureus and C. bovis were inactivated after 30 s of PDI irradiation.
S. agalactiae was inactivated after 120 s of PDI irradiation.
P. zopfii was inactivated after 180 s of PDI irradiation.