Sensitivity of Bacteria, Protozoa, Viruses, and Other Microorganisms to Ultraviolet Radiation

Masjoudi, Mahsa; Mohseni, Madjid; Bolton, James R.

doi:10.6028/jres.126.021

Cited by 39 publications

(33 citation statements)

References 7 publications

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“…Jensen et al also reported that 3 log reductions in vaccinia virus concentrations can be achieved when it is exposed to 0.03 W·min/ft 2 UV radiation intensity (approximately 1.94 mJ/cm 2 ) . This UV dose is very encouraging and corresponds with inactivation doses reported for other enveloped viruses such as HCoV-229E (1.7–3.2 mJ/cm 2 ) and murine hepatitis virus (1–3.2 mJ/cm 2 ) …”

Section: Likelihood Of Direct or Indirect Exposure To Mpxv In Water A...mentioning

confidence: 68%

The Current Multicountry Monkeypox Outbreak: What Water Professionals Should Know

Maal‐Bared¹,

Gerba

Bibby

et al. 2022

ACS EST Water

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Recent water sector safety concerns during the COVID-19 pandemic highlight the need for industry-focused reviews of emerging pathogens to support evidence-based utility decision-making. Between May 7 and August 20, 2022, more than 41 358 cases of human monkeypox were reported globally from over 87 countries in which the disease is not endemic. Given that the presence and persistence of monkeypox virus (MPXV) in feces, water, and wastewater has not been investigated, we summarize the available evidence on MPXV and related orthopoxviruses to provide sector-wide recommendations and identify knowledge gaps. On the basis of the information available to date, this outbreak is unlikely to pose an exposure and transmission risk from wastewater, biosolids, or water due to the absence of any evidence to date that suggests that infectious MPXV is present in wastewater or biosolids or has caused human cases, clusters, or outbreaks from exposure to these sources. In addition, remaining smallpox vaccine immunity in the population, availability of vaccines and treatments, susceptibility of poxviruses to disinfection (e.g., UV and chlorine), and evidence from health care confirming the efficacy of infection control measures all suggest that current treatment and recommended wastewater worker protection practices are sufficient to protect public and occupational health.

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Section: Likelihood Of Direct or Indirect Exposure To Mpxv In Water A...mentioning

confidence: 68%

The Current Multicountry Monkeypox Outbreak: What Water Professionals Should Know

Maal‐Bared¹,

Gerba

Bibby

et al. 2022

ACS EST Water

View full text Add to dashboard Cite

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“…A list of average log reduction doses of ESKAPE pathogens is represented in Table 2. The wide range of resulting doses by different research groups were described in various review articles and other literature (Malayeri et al, 2016;Hessling et al, 2021b;Masjoudi et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…In the search of possible literature data of the reduction doses, many different methods and realizations have been noticed, with more data on experiments at 254 nm than at 222 nm (Malayeri et al, 2016;Hessling et al, 2021b;Masjoudi et al, 2021). However, since a similar performance has been desired to obtain clearer conclusions without unknown side effects, only data from studies with predefined criteria have been selected.…”

Section: Discussionmentioning

confidence: 99%

Investigation on Potential ESKAPE Surrogates for 222 and 254 nm Irradiation Experiments

Gierke

Heßling

2022

Front. Microbiol.

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BackgroundDue to the increase in multidrug-resistant pathogens, it is important to investigate further antimicrobial options. In order not to have to work directly with pathogens, the investigation of possible surrogates is an important aspect. It is examined how suitable possible surrogate candidates for ESKAPE pathogens are for UVC applications. In addition, the inactivation sensitivities to 222 and 254 nm radiation are compared in relation.MethodsNon-pathogenic members (Enterococcus mundtii, Staphylococcus carnosus, Acinetobacter kookii, Pseudomonas fluorescens and Escherichia coli) of genera of ESKAPE strains were photoinactivated in PBS with irradiation wavelengths of 222 and 254 nm (no non-pathogenic Klebsiella was available). Log reduction doses were determined and compared to published photoinactivation results on ESKAPE pathogens. It was assumed that non-pathogenic bacteria could be designated as surrogates for one wavelength and one ESKAPE strain, if the doses were between the 25 and 75% quantiles of published log reduction dose of the corresponding pathogen.ResultsFor all non-pathogen relatives (except A. kookii), higher average log reduction doses were required for irradiation at 222 nm than at 254 nm. Comparison by boxplot revealed that five of eight determined log reduction doses of the possible surrogates were within the 25 and 75% quantiles of the data for ESKAPE pathogens. The measured log reduction dose for non-pathogenic E. coli was above the 75% quantile at 222 nm, and the log reduction dose for S. carnosus was below the 25% quantile at 254 nm.ConclusionFor more than half of the studied cases, the examined ESKAPE relatives in this study can be applied as surrogates for ESKAPE pathogens. Because of lack of data, no clear statement could be made for Enterococcus faecalis at 222 nm and Acinetobacter baumannii at both wavelengths.

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“…We tested the planners considering two different doses of 20 mJcm/ 2 and 100 mJcm/ 2 , as if they were performing disinfection for a virus, such as the SARS-CoV-2, which requires small doses of UV-C to be eliminated [15], or for a bacteria, which requires higher UV-C doses [16], [17]. Every combination of planner, scenario, and ideal dose was repeated five times, totaling 120 experiments.…”

Section: B Comparison Of Different Disinfection Plannersmentioning

confidence: 99%

Autonomous Environment Disinfection Based on Dynamic UV-C Irradiation Map

Mantelli

Santos

Fraga

et al. 2022

IEEE Robot. Autom. Lett.

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The COVID-19 pandemic has become a worldwide concern and has motivated the entire scientific community to join efforts to fight it. Studies have shown that SARS-CoV-2 remains viable onsurfaces for days, increasing the chances of human infection. Environmental disinfection is thus an important action to prevent the transmission of the virus. Despite the valuable contribution of the research community to the field of UV-C disinfection by robots, there still lacks a disinfection system that is fully autonomous and computes its trajectory in real-time and in unknown environments. To meet this need, we propose an autonomous UV-C disinfection strategy for indoor environments based on a dynamic Irradiation Map that indicates the amount of energy applied in each region. Our method was tested in different scenarios and compared with other disinfection strategies. Experiments show that our approach delivers better results, especially when targeting high ideal UV-C doses.

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Sensitivity of Bacteria, Protozoa, Viruses, and Other Microorganisms to Ultraviolet Radiation

Cited by 39 publications

References 7 publications

The Current Multicountry Monkeypox Outbreak: What Water Professionals Should Know

The Current Multicountry Monkeypox Outbreak: What Water Professionals Should Know

Investigation on Potential ESKAPE Surrogates for 222 and 254 nm Irradiation Experiments

Autonomous Environment Disinfection Based on Dynamic UV-C Irradiation Map

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