Проблемы особо опасных инфекций (Jul 2023)

Disinfection of Surfaces Contaminated with SARS-CoV-2 Coronavirus by UV Radiation of Low-Pressure Mercury-Vapour Lamp

  • D. N. Masyakin,
  • A. E. Alferov,
  • S. G. Kikot’,
  • I. A. Androshchuk,
  • V. B. Kirillov,
  • S. L. Kirillova,
  • E. A. Koval’chuk,
  • M. A. Kotov,
  • V. А. Lopota,
  • I. G. Rudoy,
  • N. G. Solov’ev,
  • A. M. Soroka,
  • V. V. Trufanova,
  • N. Ya. Chepurenkov,
  • A. N. Shemyakin,
  • M. Yu. Yakimov,
  • S. V. Borisevich

DOI
https://doi.org/10.21055/0370-1069-2023-2-134-139
Journal volume & issue
Vol. 0, no. 2
pp. 134 – 139

Abstract

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The aim of the work was to determine the effective ultraviolet (UV) doses required for the disinfection of surfaces contaminated with the SARS-CoV-2 coronavirus using a low-pressure mercury lamp. Materials and methods. To carry out prompt disinfection of surfaces, a specially designed source of UV radiation with a power of 7.5 W at a wavelength of 254 nm in the form of a portable flashlight was employed, which has a high efficiency of UV radiation output and the possibility of long-term autonomous operation from a compact battery. In the studies, a suspension culture of the SARS-CoV-2 coronavirus with biological activity of 5.3∙106 PFU/ml was used. The objects of testing were plastic Petri dishes (disposable) and office paper (grade C, density 80 g/m2 ). Results and discussion. Doses of UV radiation that provide disinfection of surfaces contaminated with the COVID-19 pathogen with an efficiency of 99.0 % (paper) to 99.95 % (plastic) have been determined. The results obtained make it possible to recommend a portable UV irradiator for use in the practice of preventive measures to combat the spread of the disease caused by the SARS-CoV-2 coronavirus.

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