Reactivation of fungal spores in water following UV disinfection: Effect of temperature, dark delay, and real water matrices

Wen, Gang; Wan, Qiqi; Deng, Xiaoli; Cao, Ruihua; Xu, Xiangqian; Chen, Zhuhao; Wang, Jingyi

doi:10.1016/j.chemosphere.2019.124490

Cited by 42 publications

(18 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These free radicals miss one or more electrons; therefore, they invade other molecules like proteins or DNA molecules to capture electrons (24,25). Among various DNA repair systems known in fungi, nucleotide excision repair and photo reactivation are essential in repairing the damage induced by UV (26,27). Based on evidence, UVC radiation irreversibly affects fungal colony morphology (28,29).…”

Section: Discussionmentioning

confidence: 99%

Does Prolonged Exposure of Environmental Fungi to Ultraviolet Irradiation Change the Pattern of Drug Resistance?

Lotfali

Valizadeh

Ghasemi

et al. 2021

Jundishapur J Microbiol

View full text Add to dashboard Cite

Background: The pathogenic and opportunistic fungal species cause life-threatening infections in immunocompromised patients. The ultraviolet (UV) germicidal irradiation is a well-known method for inactivating a significant number of microorganisms and has wide application for sterilization. Objectives: This study aimed to investigate the effect of ultraviolet C (UV-C) irradiation on the antifungal susceptibility pattern of some filamentous fungi. Methods: The effect of UV-C on the antifungal susceptibility pattern of itraconazole, voriconazole, fluconazole, and amphotericin B against filamentous fungi was examined. Changes in the morphological features of resistant strains following UV-C irradiation were also evaluated using scanning electron microscopy. Results: The results revealed a significant decrease in the number of the surviving spores of strains with the prolongation of UV-C irradiation (0 - 10 to 20 min; P < 0.05). Concerning the morphology of resistant Aspergillus spp., the results of scanning electron microscopy showed a significant increase in the length of irradiated hyphae compared to the non-irradiated hyphae (P < 0.05). In addition, colony count showed a significant decrease (P < 0.05). The findings revealed that UV-C radiation exposure could alter the antifungal susceptibility pattern of Aspergillus spp., such as increasing the minimum inhibitory concentration. Conclusions: Aspergillus spp. can cause systemic infections among lab technicians exposed to different doses of radiation. Moreover, this increase in susceptibility pattern can directly affect the duration of treatment.

show abstract

Section: Discussionmentioning

confidence: 99%

Does Prolonged Exposure of Environmental Fungi to Ultraviolet Irradiation Change the Pattern of Drug Resistance?

Lotfali

Valizadeh

Ghasemi

et al. 2021

Jundishapur J Microbiol

View full text Add to dashboard Cite

show abstract

“…To guarantee the chlorination disinfection effect for bacteria and virus, especially for COVID-19, higher dose of chlorine and longer contact time were required ( Chu et al, 2021b ; Wang et al, 2020a , Wang et al, 2020b ), which could cause potential risk, such as generating viable but non-cultivable bacteria ( Wang et al, 2021 ). UV could also inactivate Escherichia coli and Enterococcus faecalis , but the bacteria could regrow after UV disinfection ( Li et al, 2017 ; Wen et al, 2019 ). Ozone is globally recognized as a green, broad-spectrum and efficient disinfectant ( Morrison et al, 2022 ; Zhang et al, 2020 ), but it is relative high cost and lack of lasting disinfection effect ( Morrison et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Treatment of hospital wastewater by electron beam technology: Removal of COD, pathogenic bacteria and viruses

Wang

Chen²,

et al. 2022

Chemosphere

View full text Add to dashboard Cite

“…UV can directly damage cellular DNA with little or no damage to cell walls and cell membranes (Wen et al, 2017b;Sinha and Häder, 2003). However, reanimation may occur after UV disinfection (Wen et al, 2019a;Wen et al, 2019b). Sequential inactivation can solve this problem to a large extent.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in real water substrate, fungal spores exhibited higher levels of photoactivation. Low temperature and dark delay could effectively inhibit the fungal light response(Wen et al, 2019b). Another method of microbial resurrection is dark repair, in which damaged DNA is replaced by new, undamaged nucleotides unaffected by light(Sinha and Häder, 2002).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Recent Progresses on the Pollution Characteristics and Inactivation Approaches of Fungi in Water

Chen

2022

Preprint

View full text Add to dashboard Cite

Fungi are ubiquitous components of the phylogeny and functional diversity of almost all ecosystems on earth, which are widely distributed in natural and artificial water bodies. People are constantly exposed to fungi. Direct or indirect contact with certain fungi can cause human diseases. In addition, people’s awareness and demand for safe water are gradually increasing in recent years. However, compared with the bacteria that have been widely studied, fungi are less studied, so it is necessary to systematically study the inactivation of fungi. This paper mainly reviews the pollution characteristics of fungi in water and two kinds of fungi inactivation approaches. The first method for fungi inactivation is single disinfectant inactivation, such as chlorine inactivation, chlorine dioxide inactivation, ultraviolet inactivation and ozone inactivation. The second type is combined inactivation, they are advanced oxidation process (AOP) and ultraviolet-chlorine, ozone-chlorine sequential inactivation process. Among all the fungi inactivation pathways mentioned above, AOP and sequential inactivation were better than single disinfectant inactivation. UV and sunlight enhance the inactivating effect of oxidants on fungi by producing hydroxyl radicals. For sequential inactivation, synergistic effect plays an important role. This paper has certain reference significance on how to choose inactivation methods and follow-up fungal inactivation research.

show abstract

Reactivation of fungal spores in water following UV disinfection: Effect of temperature, dark delay, and real water matrices

Cited by 42 publications

References 33 publications

Does Prolonged Exposure of Environmental Fungi to Ultraviolet Irradiation Change the Pattern of Drug Resistance?

Does Prolonged Exposure of Environmental Fungi to Ultraviolet Irradiation Change the Pattern of Drug Resistance?

Treatment of hospital wastewater by electron beam technology: Removal of COD, pathogenic bacteria and viruses

Recent Progresses on the Pollution Characteristics and Inactivation Approaches of Fungi in Water

Contact Info

Product

Resources

About