Synergistic action of photosensitizers and normal human serum in a bactericidal process. I. Effect of chlorophylls.

Abstract

Susceptibility of some Gram-negative strains against the bactericidal action of normal human serum (NHS) and of chlorophyll, which induces production of reactive oxygen species by light, was studied. A synergistic bactericidal activity of NHS and chlorophyll against E. coli K1 and Shigella flexneri strains was observed.