Special Features of Gram-Positive Bacterial Eradication by Photosensitizers

ISSN: 2212-4071 (Online)
ISSN: 1574-891X (Print)

Volume 12, 2 Issues, 2017

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Recent Patents on Anti-Infective Drug Discovery

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Dieter Kabelitz
Institute of Immunology
Universitätsklinikum Schleswig-Holstein
Campus Kiel
Arnold-Heller-Straße 3
Kiel, D-24105

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Special Features of Gram-Positive Bacterial Eradication by Photosensitizers

Recent Patents on Anti-Infective Drug Discovery, 8(2): 88-99.

Author(s): Yeshayahu Nitzan and Marina Nisnevitch.

Affiliation: Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.


Antibiotic resistance of pathogenic bacteria is a major concern and presents a special challenge for development of alternative antibacterial modalities. One of these alternative approaches is based on using the photodynamic therapy (PDT) for eradicating bacteria. Photosensitizer-induced PDT exhibits unique properties and demonstrates efficient microbe-killing effects. The efficient and irreversible antimicrobial effects of PDT are not dependent on the antibiotic susceptibility of the pathogenic bacteria to antibiotics. Gram-positive bacteria exhibit efficient binding of the photosensitizer to the bacterial barriers, leading to immediate photoinactivation of the bacteria. Photoinactivation of Gram-positive bacteria by various photosensitizers has become a high priority, since these bacteria are responsible for life-threatening infections in humans, especially in the elderly and in compromised hosts in whom they cause hospital-acquired infections. The present review concentrates on the photoinactivation of Staphylococi, Streptococci, Propionibacterium acnes, Deinococcus radiodurans, aerobic spore-forming Bacilli by various photosensitizers and by various methods described in numerous works and patents.


Gram-positive bacteria, patents, photodynamic inactivation, photosensitizers.

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Article Details

Volume: 8
Issue Number: 2
First Page: 88
Last Page: 99
Page Count: 12
DOI: 10.2174/1574891X113089990013
Price: $100

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