“…The cytoplasmic membrane of the bacterium is damaged, leading to the inactivation of the membrane transport system, inhibition of the plasma membrane, enzymatic activities, and lipid peroxidation (27), destruction of proteins and ion channels, elimination of critical metabolic enzymes, cell agglutination, and direct inhibition of exogenous virulence factors such as lipopolysaccharides, collagenase, and protease. PDT acts in microorganisms such as fungi, viruses, and protozoans, infections due to simple herpes virus, P. gingivalis, Porphyromonas intermedia, and A. actinomycetemcomitans (28).…”