| RRC ID |
21473
|
| 著者 |
Nourmoradi H, Nikaeen M, Stensvold CR, Mirhendi H.
|
| タイトル |
Ultraviolet irradiation: An effective inactivation method of Aspergillus spp. in water for the control of waterborne nosocomial aspergillosis.
|
| ジャーナル |
Water Res
|
| Abstract |
Invasive aspergillosis is the second most common cause of nosocomial fungal infections and occurring mainly by Aspergillus fumigatus, Aspergillus flavus, and Aspergillus niger. There is evidence that nosocomial aspergillosis may be waterborne. This study was conducted to evaluate the ultraviolet (UV) irradiation efficiency in terms of inactivating the most important Aspergillus species in water since these are potential sources for nosocomial aspergillosis. A continuous flow UV reactor which could be used as a point-of-use (POU) system was used to survey Aspergillus inactivation by UV irradiation. The inactivation efficiency of UV fluence (4.15-25 mJ/cm(2)) was measured by determination of fungal density in water before and after radiation. Because turbidity and iron concentration are two major water quality factors impacting UV disinfection effectiveness, the potential influence of these factors on UV inactivation of Aspergillus spp. was also measured. The 4 log inactivation for A. fumigatus, A. niger and A. flavus at a density of 1000 cfu/ml was achieved at UV fluences of 12.45 mJ/cm(2), 16.6 mJ/cm(2) and 20.75 mJ/cm(2), respectively. The inactivation efficiency for lower density (100 cfu/ml) was the same as for the higher density except for A. flavus. The removal efficiency of Aspergillus spp. was decreased by increasing the turbidity and iron concentration. UV disinfection could effectively inactivate Aspergillus spores from water and eliminate potential exposure of high-risk patients to fungal aerosols by installation of POU UV systems.
|
| 巻・号 |
46(18)
|
| ページ |
5935-40
|
| 公開日 |
2012-11-15
|
| DOI |
10.1016/j.watres.2012.08.015
|
| PII |
S0043-1354(12)00602-1
|
| PMID |
22985523
|
| MeSH |
Aspergillosis / prevention & control
Aspergillus / radiation effects*
Disinfection / methods*
Ultraviolet Rays*
Water Microbiology
Water Purification
|
| IF |
9.13
|
| 引用数 |
16
|
|
WOS 分野
|
WATER RESOURCES
ENVIRONMENTAL SCIENCES
ENGINEERING, ENVIRONMENTAL
|
| リソース情報 |
| 一般微生物 |
JCM 2061
JCM 10253
JCM 10254 |
