Effectiveness of visible and ultraviolet light emitting diodes for inactivation of Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli: A comparative study
| Autor: | Masatake Akutagawa, Sameen Ahmed Malik, Azli Yahya, Leong Kah Meng, Nik Ahmad Nizam Nik Malek, Tengku Ahmad Iskandar Tengku Alang, Tan Jia Hou, Tan Tian Swee, Kelvin Ling Chia Hiik, Takahiro Emoto |
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| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Inhibition zone 030306 microbiology Chemistry Pseudomonas aeruginosa General Mathematics Microorganism Ultraviolet light emitting diodes General Physics and Astronomy General Chemistry 030501 epidemiology medicine.disease_cause General Biochemistry Genetics and Molecular Biology Microbiology law.invention 03 medical and health sciences Linear relationship Staphylococcus aureus law medicine sense organs 0305 other medical science General Agricultural and Biological Sciences Escherichia coli Light-emitting diode |
| Zdroj: | Malaysian Journal of Fundamental and Applied Sciences. 15:572-576 |
| ISSN: | 2289-599X 2289-5981 |
| Popis: | The rapid use of ultraviolet light emitting diodes (UV-LEDs) in various disinfection applications is growing tremendously due to their advantages unachievable using UV lamps. In this study, a comparison of standard LED at 460 nm wavelength and UVA LED at 385 nm was conducted to determine their effectiveness in disinfection of frequently isolated pathogens in hospitals (Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli). Determination of disinfection efficiency was carried out by measuring inhibition zone. Effects of varied exposure time on the inactivation of pathogenic microorganisms was studied. The results demonstrated that LED does not have germicidal activities. The highest inactivation for UVA LED was achieved for Pseudomonas aeruginosa. Linear relationship was found between exposure time and log reduction. This study showed that UVA LEDs can effectively inactivate significantly higher number of microorganisms hence can be used in disinfection of various applications. |
| Databáze: | OpenAIRE |
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