The Experts below are selected from a list of 31974 Experts worldwide ranked by ideXlab platform
Cristina Fantino - One of the best experts on this subject based on the ideXlab platform.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated bylegionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:Abstract We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection ( 3 cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated by legionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection (<10 cfu/L), even when the incoming water was highly contaminated. One distal point showed little or no contamination (<10-20 cfu/L), while the other showed little to moderate contamination (<10(3) cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
L Franzin - One of the best experts on this subject based on the ideXlab platform.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated bylegionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:Abstract We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection ( 3 cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated by legionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection (<10 cfu/L), even when the incoming water was highly contaminated. One distal point showed little or no contamination (<10-20 cfu/L), while the other showed little to moderate contamination (<10(3) cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
Joji Okazaki - One of the best experts on this subject based on the ideXlab platform.
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effect of Ultraviolet Treatment on bacterial attachment and osteogenic activity to alkali treated titanium with nanonetwork structures
International Journal of Nanomedicine, 2017Co-Authors: Honghao Zhang, Satoshi Komasa, Chiho Mashimo, Tohru Sekino, Joji OkazakiAbstract:PURPOSE Alkali-treated titanium with nanonetwork structures (TNS) possesses good osteogenic activity; however, the resistance of this material to bacterial contamination remains inadequate. As such, TNS implants are prone to postoperative infection. In this work, we attempted to alter the biological properties of TNS by Treatment with short-duration high-intensity Ultraviolet (UV) irradiation. METHODS TNS discs were treated with UV light (wavelength =254 nm, strength =100 mW/cm2) for 15 minutes using a UV-irradiation machine. We carried out a surface characterization and evaluated the discs for bacterial film formation, protein adsorption, and osteogenic features. RESULTS The superhydrophilicity and surface hydrocarbon elimination exhibited by the treated material (UV-treated titanium with a nanonetwork structure [UV-TNS]) revealed that this Treatment effectively changed the surface characteristics of TNS. Notably, UV-TNS also showed reduced colonization by Actinomyces oris during an initial attachment period and inhibition of biofilm formation for up to 6 hours. Moreover, compared to conventional TNS, UV-TNS showed superior osteogenic activity as indicated by increased levels of adhesion, proliferation, alkaline phosphatase activity, osteogenic factor production, and osteogenesis-related gene expression by rat bone marrow mesenchymal stem cells (rBMMSCs). This inverse relationship between bacterial attachment and cell adhesion could be due to the presence of electron-hole pairs induced by high-intensity UV Treatment. CONCLUSION We suggest that simple UV Treatment has great clinical potential for TNS implants, as it promotes the osseointegration of the TNS while reducing bacterial contamination, and can be conducted chair-side immediately prior to implantation.
D Cabodi - One of the best experts on this subject based on the ideXlab platform.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated bylegionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:Abstract We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection ( 3 cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
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evaluation of the efficacy of Ultraviolet irradiation for disinfection of hospital water contaminated by legionella
Journal of Hospital Infection, 2002Co-Authors: L Franzin, D Cabodi, Cristina FantinoAbstract:We evaluated the efficacy of the Ultraviolet irradiation on hospital water colonized by Legionella pneumophila serogroup 3, by inserting a lamp system on a hot water pipe supplying a small area. Cultures were performed for four months from 5L samples of water, collected before and after the Ultraviolet Treatment at the lamp unit and from two distal points. Irradiation was effective immediately after disinfection (<10 cfu/L), even when the incoming water was highly contaminated. One distal point showed little or no contamination (<10-20 cfu/L), while the other showed little to moderate contamination (<10(3) cfu/L). We conclude that Ultraviolet irradiation is useful to protect the water system in small area; however, because of the lack of residual activity, it should be combined with other methods of disinfection. Maintenance of the water system is also necessary in order to reduce biofilm formation and Legionella recolonization.
Honghao Zhang - One of the best experts on this subject based on the ideXlab platform.
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effect of Ultraviolet Treatment on bacterial attachment and osteogenic activity to alkali treated titanium with nanonetwork structures
International Journal of Nanomedicine, 2017Co-Authors: Honghao Zhang, Satoshi Komasa, Chiho Mashimo, Tohru Sekino, Joji OkazakiAbstract:PURPOSE Alkali-treated titanium with nanonetwork structures (TNS) possesses good osteogenic activity; however, the resistance of this material to bacterial contamination remains inadequate. As such, TNS implants are prone to postoperative infection. In this work, we attempted to alter the biological properties of TNS by Treatment with short-duration high-intensity Ultraviolet (UV) irradiation. METHODS TNS discs were treated with UV light (wavelength =254 nm, strength =100 mW/cm2) for 15 minutes using a UV-irradiation machine. We carried out a surface characterization and evaluated the discs for bacterial film formation, protein adsorption, and osteogenic features. RESULTS The superhydrophilicity and surface hydrocarbon elimination exhibited by the treated material (UV-treated titanium with a nanonetwork structure [UV-TNS]) revealed that this Treatment effectively changed the surface characteristics of TNS. Notably, UV-TNS also showed reduced colonization by Actinomyces oris during an initial attachment period and inhibition of biofilm formation for up to 6 hours. Moreover, compared to conventional TNS, UV-TNS showed superior osteogenic activity as indicated by increased levels of adhesion, proliferation, alkaline phosphatase activity, osteogenic factor production, and osteogenesis-related gene expression by rat bone marrow mesenchymal stem cells (rBMMSCs). This inverse relationship between bacterial attachment and cell adhesion could be due to the presence of electron-hole pairs induced by high-intensity UV Treatment. CONCLUSION We suggest that simple UV Treatment has great clinical potential for TNS implants, as it promotes the osseointegration of the TNS while reducing bacterial contamination, and can be conducted chair-side immediately prior to implantation.
