Content uploaded by Martin Hessling
Author content
All content in this area was uploaded by Martin Hessling on May 14, 2020
Content may be subject to copyright.
Ultraviolet irradiation doses for coronavirus inactivation
– review and analysis of coronavirus photoinactivation
studies
Ultraviolette Bestrahlungsdosen für die Inaktivierung von Coronaviren
– Review und Analyse von Coronavirusinaktivierungsstudien
Abstract
Background: To slow the increasing global spread of the SARS-CoV-2
virus, appropriate disinfection techniques are required. Ultraviolet radi- Martin Heßling1
Katharina Hönes1
ation (UV) has a well-known antiviral effect, but measurements on the Petra Vatter1
radiation dose necessary to inactivate SARS-CoV-2 have not been pub-
lished so far. Christian Lingenfelder2
Methods: Coronavirus inactivation experiments with ultraviolet light
performed in the past were evaluated to determine the UV radiation 1 Institute of Medical
Engineering and
dose required for a 90% virus reduction. This analysis is based on the
fact that all coronaviruses have a similar structure and similar RNA
strand length. Mechatronics, Ulm University
of Applied Sciences, Ulm,
Germany
Results: The available data reveals large variations, which are apparently
not caused by the coronaviruses but by the experimental conditions 2 Pharmpur GmbH,
Königsbrunn, Germany
selected. If these are excluded as far as possible, it appears that
coronaviruses are very UV sensitive. The upper limit determined for the
log-reduction dose (90% reduction) is approximately 10.6 mJ/cm2
(median), while the true value is probably only 3.7 mJ/cm2(median).
Conclusion: Since coronaviruses do not differ structurally to any great
exent, the SARS-CoV-2 virus – as well as possible future mutations –
will very likely be highly UV sensitive, so that common UV disinfection
procedures will inactivate the new SARS-CoV-2 virus without any further
modification.
Keywords: coronavirus, SARS-CoV, SARS-CoV-2, MERS-CoV, ultraviolet,
UVC, irradiation, inactivation, disinfection, Covid-19
Zusammenfassung
Hintergrund: Um die weltweite Ausbreitung des SARS-CoV-2 Virus zu
verlangsamen, werden geeignete Desinfektionstechniken benötigt. Ul-
traviolette Strahlung (UV) hat bekanntlich eine antivirale Wirkung, aber
Messungen zu benötigten Bestrahlungsdosen für die Inaktivierung von
SARS-CoV-2 sind bisher nicht veröffentlicht worden.
Material und Methoden: Coronavirusinaktivierungsexperimente, die in
der Vergangenheit durchgeführt wurden, werden herangezogen, um
die UV-Bestrahlungsdosis für eine 90%ige Virusreduktion zu ermitteln.
Die durchgeführte Analyse nutzt dabei die Tatsache, dass alle Corona-
viren eine ähnliche Struktur und eine vergleichbare RNA-Länge aufwei-
sen.
Ergebnisse: Die verfügbaren Daten weisen große Variationen auf, die
durch unterschiedliche experimentelle Bedingungen zu erklären sind.
Wenn extremere Versuchsbedingungen ausgeschlossen werden, zeigt
sich, dass Coronaviren sehr UV-empfindlich sind. Der ermittelte obere
Grenzwert für die log-Reduktionsdosis (90% Reduktion) beträgt ungefähr
10.6 mJ/cm2(Median), während der wahre Wert vermutlich nur etwa
3.7 mJ/cm2(Median) beträgt.
1/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Review Article
OPEN ACCESS
Schlussfolgerung: Da sich Coronaviren in ihrer Struktur nicht stark un-
terscheiden, wird auch das neue SARS-CoV-2 Virus – und mögliche zu-
künftige Mutationen – sehr UV-empfindlich sein, vermutlich sogar so
UV-empfindlich, dass etablierte UV-Desinfektionsverfahren das neue
SARS-CoV-2 Virus ohne zusätzliche Modifikationen effizient inaktivieren
können.
Schlüsselwörter: Coronavirus, SARS-CoV, SARS-CoV-2, MERS-CoV,
ultraviolette Strahlung, UVC, Bestrahlung, Inaktivierung, Desinfektion,
Covid-19
Introduction
The newest coronavirus disease COVID-19 is a highly
transmittable and pathogenic viral infection caused by
the severe acute respiratory syndrome coronavirus 2
(SARS-CoV-2), which emerged in Wuhan, China and
spread around the world. So far, more than 3.8 million
infections have led to more than 265,000 fatalities
worldwide [1].
The responsible pathogen, SARS-CoV-2, is an enveloped
single-stranded RNA virus and member of the family
coronavidae of the order nidovirales. All viruses of this
family exhibit very similar features. They have a spheroid
shape with a diameter of about 100–150 nm, are covered
with spike proteins on the outside, and have an RNA
strand length of 27–32 kb on the inside [2]. Four of these
coronaviruses are known to be the causative agents of
common colds (HCoV-229E, HCoV-NL63, HCoV-OC43 and
HCoV-HKU1), which usually only result in milder infections,
but the coronaviruses MERS-CoV (MERS: Middle East
Respiratory Syndrome) SARS-CoV and SARS-CoV-2 have
claimed many lives [3].
To stop the spread of SARS-CoV-2, several measures such
as containment, social distancing and wearing face masks
have been taken. Among other steps, hygiene procedures
have been intensified. The employment of liquid disinfec-
tants is one procedure that has been successful against
the 6 older coronaviruses [4]. Thermal disinfection has
also been proven to be quite effective, even at tempera-
tures as low as 60°C to 80°C [4].
Radiation disinfection, especially ultraviolet (UV) radiation,
is another well-known inactivation approach for all known
microorganisms and viruses that offers some advantages
over liquid disinfectants and heat sterilization. It can be
performed automatically and employed to disinfect sur-
faces, liquids, air and rooms, and it is also very energy-
efficient.
The ultraviolet spectrum is divided in 4 sections: Radiation
with a wavelength between 100 and 200 nm is called
vacuum ultraviolet radiation (VUV). It is usually not applied
for disinfection purposes because it is strongly absorbed
by air. The better-known ultraviolet ranges are UVC,
UVB, and UVA with spectral ranges of 200–280 nm,
280–315 nm, and 315–380 nm, respectively. Among
these last three UV ranges, UVC is the one with the
strongest antimicrobial/antiviral properties [5], [6]. For
RNA viruses, the main inactivation mechanism is illus-
trated in Figure 1A. UV radiation is absorbed by the RNA,
which leads to the formation of pyrimidine dimers, e.g.,
uracil dimers [6], [7].
The most common UVC light sources for many decades
now have been mercury discharge lamps, especially low-
pressure mercury vapor lamps, with a strong emission
peak at 254 nm, which is near the RNA absorption max-
imum at about 260 nm, as depicted in Figure 1B.
Although it is known that this kind of UVC radiation has
an inactivating effect on all microorganisms and viruses,
all pathogens require different UVC irradiation doses for
successful inactivation. For instance, the rotavirus re-
quires about 25 mJ/cm2of 254 nm UVC radiation from
a mercury discharge lamp for a 3-log reduction, but for
adenovirus (Type 40), the value is approximately 6 times
higher (140 mJ/cm2) [5], [8].
To answer the important question regarding SARS-CoV-2
and other coronaviruses as to which irradiation doses
are needed for inactivation, the existing coronavirus
photoinactivation results of the last 60 years have been
reviewed and analyzed in this study.
Materials and methods
Google Scholar and Pubmed were searched for different
combinations of the following terms: coronavirus, inacti-
vation, photoinactivation, disinfection, ultraviolet, radi-
ation, and light. In addition, a number of individual viruses
that belong to the families of coronaviruses although the
term “coronavirus” does not occur in their name were
also searched for, such as porcine epidemic diarrhea
virus, transmissible gastroenteritis virus, feline infectious
peritonitis virus, mouse hepatitis virus, sialodacryoadenitis
virus, hemagglutinating encephalomyelitis virus, and in-
fectious bronchitis virus.
The retrieved sources were evaluated according to the
type of sample irradiated (aerosol, surface, or liquid), the
type of light source (including emission peak wavelength),
the inactivation effect achieved, and the applied irradi-
ation dose.
If information on disinfection results for different irradi-
ation doses could be found in a single article, those de-
scribing a virus reduction by approx. 3–4 log levels were
selected. Results that were only displayed as illustrations
without the corresponding values in the text or tables
were read from previously enlarged figures.
If the necessary information was incomplete, e.g., be-
cause of missing irradiation details, the irradiation was
2/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
Figure 1: A) Scheme of UV-RNA-damaging mechanism by dimer formation. B) Relative absorption spectra of RNA, relative
emission spectrum of a low-pressure mercury vapor lamp and transmission of a typical (Eagle) cell culture medium.
estimated by available lamp information, provided that
lamp type and distance were given or by other available
means. Publications in which radiation was combined
with photosensitizers or other chemical or biochemical
agents were excluded.
Subsequently, these data were employed to calculate the
log-reduction dose, i.e., the irradiation dose required for
a 90% virus reduction.
Results and discussion
About 30 publications of scientific investigations regarding
photoinactivation of coronaviruses were identified. This
included studies on CoV, SARS-CoV or MERS-CoV. An
overview of the results is presented by sample condition
and wavelength in Table 1.
Almost all experiments were performed with mercury va-
por lamps, with a peak emission at 254 nm (UVC), which
is near the RNA absorption peak in Figure 1. Individual
investigations were performed with peak wavelengths at
222 nm (UVC), or 365 nm (UVA), or even with daylight.
In most studies, the authors did not intend to investigate
the log-reduction doses of coronaviruses, but rather virus
inactivation in various applications. In all experiments
and for all coronaviruses, a successful virus inactivation
was observed. However, because of the different objec-
tives of the studies, the experimental conditions to de-
termine the specific log-reduction doses were often diffi-
cult to identify. In many cases, information important for
the present study’s analysis was missing.
To evaluate photoinactivation results, the basic inputs
were the virus reduction and the applied irradiation dose.
Not all authors provided the applied irradiation dose, but
at least for some studies this value could be calculated
as the product of irradiation duration and irradiation in-
tensity, or it could be estimated. For some investigations,
it was impossible to quantify the disinfection success
exactly; in these cases, the values were estimated based
on the information given in Table 1. However, for some
studies, it was even impossible to roughly estimate the
log-reduction dose.
The calculated and estimated results, given as log-reduc-
tion doses, exhibit extreme variability, even within the
254 nm results, ranging from 0.6 mJ/cm2(bovine corona
virus [9]) to 11,754 mJ/cm2(SARS (CoV Urbani) [10]).
Even the differences between the SARS-CoV strains were
above two orders of magnitude concerning the necessary
dose.
Possible reasons for this observation might be biological
and biochemical differences between the coronavirus
strains. However, comparing the experimental details,
two other potential dominant factors attract attention:
1. The necessary irradiation doses are lower for viruses
on surfaces, aerosols and pure salt solutions. When
irradiation experiments were performed with the virus
in different solutions, it is important to bear in mind
that the solutions contain organic materials, e.g.,
blood products or residue from cell culture medium.
These solutions exhibit very high absorption of the
applied UVC radiation, resulting in much lower irradi-
ances for viruses that are deeper inside the sample.
This effect is clearly illustrated in Figure 1B (culture
medium transmission) and by the results of Terpstra
et al. [11]. Those authors were aware of the absorp-
tion of their samples and presented results with
10%- and 30%-virus-containing plasma within the ir-
radiated samples. Although it was the same corona-
virus (transmissible gastroenteritis virus (TGEV)) and
the same experimental setup, the results differ by a
factor of 3.1.
Most authors did not measure the UVC absorption
properties of their biological materials because it was
of no importance for their research task; thus, it is
almost impossible to extract the role of the absorption
in the calculation of the necessary irradiation doses
for a 90% virus reduction. In consequence, the lower
values for the log-reduction doses, mostly from viruses
in salt solutions, surfaces or aerosols, might be a more
realistic approach to determine the true virus log-
reduction dose.
3/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
Table 1: Overview of published and analyzed coronavirus photoinactivation investigations sorted by sample condition
4/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
(Continued)
Table 1: Overview of published and analyzed coronavirus photoinactivation investigations sorted by sample condition
5/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
2. Several investigators performed their irradiation ex-
periments in microtiter plates (MTPs). This might be-
come a problem if the plates are too close to the irra-
diation source, e.g., in the range of only a few centi-
meters. Besides the risk of heating the sample and
subsequently increased sample evaporation, deter-
mination of the irradiation intensity inside the MTP
wells becomes difficult. The MTP well walls shade the
virus-containing samples from irradiation that does
not originate directly above the well. Hence, the true
irradiation intensity within a well is probably quite low
compared to the intensity measured by a photodetec-
tor at the same distance.
Table 1 states whether a study exhibited one or two of
these complications for the intended log-reduction de-
termination. Actually, all calculated extreme values in
Table 1 seem to be influenced by both complicating
factors, and therefore these 254 nm values [12], [13],
[10] were omitted in the further analysis. The data of the
Berne torovirus [14] were also excluded, because of
structural differences between toroviruses and corona-
viruses [15].
All coronaviruses exhibit a similar structure and a single-
stranded RNA length of about 30 kb, allowing the conclu-
sion that they also feature very similar UVC absorption
and UVC disinfection properties. It is therefore justified
to consider all coronaviruses alike in terms of the inves-
tigated UVC-based log-reduction and to summarize the
individual results.
This leads to a total UVC median log-reduction dose of
10.6 mJ/cm2(average 11.9±11.4 mJ/cm2) These values
were calculated without the torovirus data and outliers,
but the input included viruses in media that probably had
higher UVC absorption, leading to reduced photoinactiva-
tion. Therefore, this 10.6 mJ/cm2is probably not the real
value for the log-reduction dose, but instead could be
considered as an upper limit.
Recalculation of the UVC log-reduction dose without using
results from higher-absorption media should lead to more
realistic values. In this case, the total median log-
reduction dose would be 3.7 mJ/cm2(average 5.8±5.5
mJ/cm2).
This overview covers all coronaviruses and both UVC
wavelengths (222 nm and 254 nm), but without results
obtained from studies with probably high absorption
media. The obtained results agree well with UVC inactiva-
tion data for other ssRNA viruses, such as influzenza A
with log-reduction doses around 2 mJ/cm2[5] or the
ssRNA bacteriophage MS2 with log-reduction doses of
about 20 mJ/cm2[5].
So far, most instances of successful coronavirus inactiva-
tion have been performed using mercury vapor lamps
with peak emission at 254 nm. To reduce the use of the
toxic mercury, it seems possible that these vapor lamps
will be replaced in the future by 222-nm excimer lamps
or by 270-nm LED. Since the RNA absorption strengths
are similar, the disinfecting effect at these wavelengths
will probably be approximately the same as with mercury
vapor lamps. However, this should be investigated in
more detail in the future, since absorptions in the lipid
envelope might have a larger influence on virus inactiva-
tion than currently assumed.
Because there are only single results available for the
effect of 365 nm (UVA) and daylight, the focus of this
analysis is on UVC coranavirus inactivation. Both irradi-
ation methods demonstrated a virus reduction, albeit
seemingly much less effective than that achieved with
254 nm irradiation. Nevertheless, these longer wave-
lengths might also be of future interest because their
absorption in samples with organic materials is much
lower, resulting in higher penetration depths which may
allow virus inactivation of larger volumes.
Conclusion
To date, UVC radiation has been effective against all
coronaviruses in all published investigations, although
the absorption properties of the sample media reduced
inactivation success. The calculated upper limit for the
log-reduction median dose (in low-absorbance media) is
10.6 mJ/cm2, but the probably more precise estimation
is 3.7 mJ/cm2.
These results were obtained by investigations on many
different coronaviruses, including SARS-CoV and MERS-
CoV, but not SARS-CoV-2. Nevertheless, it can be as-
sumed that they are also applicable for SARS-CoV-2 and
all future mutations. RNA mutations might have a strong
influence on the pathogenicity of a virus, but they do not
result in larger structural differences, especially concern-
ing the UV absorption properties of the RNA, which are
the main cause for the antiviral effect of ultraviolet radi-
ation.
The above-mentioned log-reduction doses are in the same
order of magnitude or even smaller than log-reduction
doses for other important pathogens, such as Staphylo-
coccus aureus,Escherichia coli,Klebsiella pneumonia
or Candida albicans [5]. They are also low compared to
UVC irradiation recommendations, for instance, the inter-
national standard for UV disinfection of drinking water
[16] with its recommended irradiation dose of 40 mJ/cm2.
Therefore, it can be concluded that existing UVC disinfec-
tion systems and procedures will be sufficient to deal
with all coronaviruses, including SARS-CoV-2.
Notes
Competing interests
The authors declare that they have no competing in-
terests.
6/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
References
1. Johns Hopkins University. Coronavirus Resource Center – COVID-
19 Dashboard by the Center for SystemsScience and Engineering
(CSSE) at Johns Hopkins University. [accessed 2020 May 6].
Available from: https://coronavirus.jhu.edu/map.html
2. Li X, Luk HKH, Lau SKP, Woo PCY. Human Coronaviruses: General
Features. In: Reference Module in Biomedical Sciences.
Amsterdam: Elsevier; 2019. p. 1-6. DOI: 10.1016/B978-0-12-
801238-3.95704-0
3. Chang L, Yan Y, Wang L. Coronavirus Disease 2019:
Coronaviruses and Blood Safety. Transfus Med Rev. 2020 Feb
21. pii: S0887-7963(20)30014-6. DOI:
10.1016/j.tmrv.2020.02.003
4. Kampf G, Voss A, Scheithauer S. Inactivation of coronaviruses
by heat. J Hosp Infect. 2020 Mar 31. DOI:
10.1016/j.jhin.2020.03.025
5. Kowalski W. Ultraviolet Germicidal Irradiation Handbook. Berlin,
Heidelberg: Springer; 2009.
6. Jagger J. Introduction to Research in Ultraviolet Photobiology.
Photochem Photobiol. 1968;7:413. DOI: 10.1111/j.1751-
1097.1968.tb08029.x
7. Budowsky EI, Bresler SE, Friedman EA, Zheleznova NV. Principles
of selective inactivation of viral genome. I. UV-induced inactivation
of influenza virus. Arch Virol. 1981;68(3-4):239-47. DOI:
10.1007/BF01314577
8. Chevrefils G, Caron É. UV dose required to achieve incremental
Log inactivation of bacteria, protozoa and viruses. IUVA News.
2006;8(1):38-45.
9. Kowalski W. Performance of the UV24 Unit Against Zoonotic
Pathogens. San Fernando, CA: Medical Illumination. 2017 Feb
1. Available from: http://www.medillum.com/wp-content/
uploads/2017/03/Performance-of-the-UV24-Unit-Against-
Zoonotic-Pathogens.pdf
10. Darnell MER, Taylor DR. Evaluation of inactivation methods for
severe acute respiratory syndrome coronavirus in noncellular
blood products. Transfusion. 2006 Oct;46(10):1770-7. DOI:
10.1111/j.1537-2995.2006.00976.x
11. Terpstra FG, van ’t Wout AB, Schuitemaker H, van Engelenburg
FAC, Dekkers DWC, Verhaar R, de Korte D, Verhoeven AJ.
Potential and limitation of UVC irradiation for the inactivation of
pathogens in platelet concentrates. Transfusion. 2008
Feb;48(2):304-13. DOI: 10.1111/j.1537-2995.2007.01524.x
12. Pratelli A. Canine coronavirus inactivation with physical and
chemical agents. Vet J. 2008 Jul;177(1):71-9. DOI:
10.1016/j.tvjl.2007.03.019
13. Darnell MER, Subbarao K, Feinstone SM, Taylor DR. Inactivation
of the coronavirus that induces severe acute respiratory
syndrome, SARS-CoV. J Virol Methods. 2004 Oct;121(1):85-91.
DOI: 10.1016/j.jviromet.2004.06.006
14. Weiss M, Horzinek MC. Resistance of Berne virus to physical and
chemical treatment. Vet Microbiol. 1986 Feb;11(1):41-9. DOI:
10.1016/0378-1135(86)90005-2
15. Cavanagh D. Coronaviruses and Toroviruses. In: Zuckerman AJ,
Banatvala JE, Pattison JR, editors. Principles and practice of
clinical virology. 4th ed. Chichester: Wiley; 2000. p. 345-56. DOI:
10.1002/0470842474.ch10
16. DIN Deutsches Institut für Normung e.V. DIN EN 14897:2007-
09 – Anlagen zur Behandlung von Trinkwasser innerhalb von
Gebäuden – Geräte mit Quecksilberdampf-Niederdruckstrahlern
– Anforderungen an Ausführung, Sicherheit und Prüfung [DIN
EN 14897:2007-09 – Water conditioning equipment inside
buildings – Devices using mercury low-pressure ultraviolet
radiators – Requirements for performance, safety and testing].
Berlin: Beuth; 2007.
17. Buonanno M, Welch D, Shuryak I, Brenner DJ. Far-UVC light
efficiently and safely inactivates airborne human coronaviruses.
(Preprint, Version 1). Research Square. 2020 Apr 27. DOI:
10.21203/rs.3.rs-25728/v1
18. Walker CM, Ko G. Effect of ultraviolet germicidal irradiation on
viral aerosols. Environ Sci Technol. 2007 Aug 1;41(15):5460-5.
DOI: 10.1021/es070056u
19. Bedell K, Buchaklian AH, Perlman S. Efficacy of an Automated
Multiple Emitter Whole-Room Ultraviolet-C Disinfection System
Against Coronaviruses MHV and MERS-CoV. Infect Control Hosp
Epidemiol. 2016 May;37(5):598-9. DOI: 10.1017/ice.2015.348
20. Deshmukh DR, Pomeroy BS. Ultraviolet inactivation and
photoreactivation of avian viruses. Avian Dis. 1969
Aug;13(3):596-602.
21. Cartwright SF. A cytopathic virus causing a transmissible
gastroenteritis in swine. II. Biological and serological studies. J
Comp Pathol. 1966 Jan;76(1):95-106. DOI: 10.1016/0021-
9975(66)90051-x
22. Ansaldi F, Banfi F, Morelli P, Valle L, Durando P, Sticchi L, Contos
S, Gasparini R, Crovari P. SARS-CoV, influenza A and syncitial
respiratory virus resistance against common disinfectants and
ultraviolet irradiation. J Prev Med Hyg. 2004 Mar;45(1-2):5-8.
23. Saknimit M, Inatsuki I, Sugiyama Y, Yagami K. Virucidal efficacy
of physico-chemical treatments against coronaviruses and
parvoviruses of laboratory animals. Jikken Dobutsu. 1988
Jul;37(3):341-5. DOI: 10.1538/expanim1978.37.3_341
24. Hirano N, Hino S, Fujiwara K. Physico-chemical properties of
mouse hepatitis virus (MHV-2) grown on DBT cell culture.
Microbiol Immunol. 1978;22:377-90. DOI: 10.1111/j.1348-
0421.1978.tb00384.x
25. Bucknall RA, King LM, Kapikian AZ, Chanock RM. Studies with
human coronaviruses. II. Some properties of strains 229E and
OC43. Proc Soc Exp Biol Med. 1972;139(3):722-7. DOI:
10.3181/00379727-139-36224
26. Otsuki K, Yamamoto H, Tsubokura M. Studies on avian infectious
bronchitis virus (IBV): I. Resistance of IBV to chemical and
physical treatments. Arch Virol. 1979;60(1):25-32. DOI:
10.1007/BF01318094
27. Eickmann M, Gravemann U, HandkeW, Tolksdorf F, Reichenberg
S, Müller TH, Seltsam A. Inactivation of Ebola virus and Middle
East respiratory syndrome coronavirus in platelet concentrates
and plasma by ultraviolet C light and methylene blue plus visible
light, respectively. Transfusion. 2018 Sep;58(9):2202-7. DOI:
10.1111/trf.14652
28. Liu Y, Cai Y, Zhang X. Induction of caspase-dependent apoptosis
in cultured rat oligodendrocytes by murine coronavirus is
mediated during cell entry and does not require virus replication.
J Virol. 2003 Nov;77(22):11952-63. DOI:
10.1128/jvi.77.22.11952-11963.2003
29. Blázquez E, Rodríguez C, Ródenas J, Navarro N, Riquelme C,
Rosell R, Campbell J, Crenshaw J, Segalés J, Pujols J, Polo J.
Evaluation of the effectiveness of the SurePure Turbulator
ultraviolet-C irradiation equipment on inactivation of different
enveloped and non-enveloped viruses inoculated in commercially
collected liquid animal plasma. PLoS ONE. 2019 Feb
21;14(2):e0212332. DOI: 10.1371/journal.pone.0212332
7/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
30. Eickmann M, Gravemann U, HandkeW, Tolksdorf F, Reichenberg
S, Müller TH, Seltsam A. Inactivation of three emerging viruses
– severe acute respiratory syndrome coronavirus, Crimean-Congo
haemorrhagic fever virus and Nipah virus – in platelet
concentrates by ultraviolet C light and in plasma by methylene
blue plus visible light. Vox Sang. 2020 Apr;115(3):146-51. DOI:
10.1111/vox.12888
31. Kariwa H, Fujii N, Takashima I. Inactivation of SARS coronavirus
by means of povidone-iodine, physical conditions, and chemical
reagents. Jpn J Vet Res. 2004 Nov;52(3):105-12.
32. Duan SM, Zhao XS, Wen RF, Huang JJ, Pi GH, Zhang SX, Han J,
Bi SL, Ruan L, Dong XP; SARS Research Team. Stability of SARS
coronavirus in human specimens and environment and its
sensitivity to heating and UV irradiation. Biomed Environ Sci.
2003 Sep;16(3):246-55.
Corresponding author:
Prof. Dr. Martin Heßling
Institute of Medical Engineering and Mechatronics, Ulm
University of Applied Sciences, Albert-Einstein-Allee 55,
89081 Ulm, Germany
Martin.Hessling@thu.de
Please cite as
Heßling M, Hönes K, Vatter P, Lingenfelder C. Ultraviolet irradiation
doses for coronavirus inactivation – review and analysis of coronavirus
photoinactivation studies. GMS Hyg Infect Control. 2020;15:Doc08.
DOI: 10.3205/dgkh000343, URN: urn:nbn:de:0183-dgkh0003436
This article is freely available from
https://www.egms.de/en/journals/dgkh/2020-15/dgkh000343.shtml
Published:
2020-05-14
Copyright
©2020 Heßling et al. This is an Open Access article distributed under
the terms of the Creative Commons Attribution 4.0 License. See license
information at http://creativecommons.org/licenses/by/4.0/.
8/8GMS Hygiene and Infection Control 2020, Vol. 15, ISSN 2196-5226
Heßling et al.: Ultraviolet irradiation doses for coronavirus inactivation ...
