| Autor: |
Galo IDC; Universidade Federal de Jataí - UFJ, Laboratório de Genética e Biologia Molecular, Programa de Pós-graduação em Ciências Aplicadas à Saúde, Jataí, GO, Brasil., Prado RP; Universidade Federal de Catalão - UFCAT, Departamento de Medicina, Catalão, GO, Brasil., Santos WGD; Universidade Federal de Jataí - UFJ, Laboratório de Genética e Biologia Molecular, Programa de Pós-graduação em Ciências Aplicadas à Saúde, Jataí, GO, Brasil. |
| Jazyk: |
angličtina |
| Zdroj: |
Brazilian journal of biology = Revista brasleira de biologia [Braz J Biol] 2021 Mar 29; Vol. 82, pp. e231742. Date of Electronic Publication: 2021 Mar 29 (Print Publication: 2021). |
| DOI: |
10.1590/1519-6984.231742 |
| Abstrakt: |
The ability of pathogenic bacteria acquire resistance to the existing antibiotics has long been considered a dangerous health risk threat. Currently, the use of visible light has been considered a new approach to treat bacterial infections as an alternative to antibiotics. Herein, we investigated the antimicrobial effect of two range of visible light, blue and red, on Staphylococcus aureus and Pseudomonas aeruginosa, two pathogenic bacterial commonly found in healthcare settings-acquired infections and responsible for high rate of morbidity and mortality. Bacterial cultures were exposed to blue or red light (470 nm and 660 nm) provided by light-emitting diodes - LED. The fluencies and irradiance used for blue and red light were 284.90 J/cm2, 13.19 mW/cm2 and 603.44 J/cm2, 27.93 mW/cm2 respectively. Different experimental approaches were used to determine the optimal conditions of light application. Only exposure to blue light for 6 hours was able to inhibit about 75% in vitro growth of both bacterial species after 24 hours. The surviving exposed bacteria formed colonies significantly smaller than controls, however, these bacteria were able to resume growth after 48 hours. Blue light was able to inhibit bacterial growth upon inoculation in both saline solution and BHI culture medium. We can conclude that blue light, but not red light, is capable of temporarily retarding the growth of gram negative and gram positive bacteria. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
