Disinfection of Selected Aspergillus spp. Using Ultraviolet Germicidal Irradiation

Details

• Personal Author:
  Gibb SG ; Green CF ; Jensen NJ ; Jensen P ; Scarpino PV
• Description:
  Aims: The efficacy of ultraviolet germicidal irradiation (UVGI) and the UVGI dose necessary to inactivate fungal spores on an agar surface for cultures of Aspergillus flavus and Aspergillus fumigatus were determined. Methods and results: A four-chambered UVGI testing unit with a 9-W, Phillips, low pressure, mercury UVGI lamp in each chamber was used in this study. An aperture was adjusted to provide 50, 100, 150, and 200 muW/cm(2) of uniform flux to the surfaces of the Petri dish, resulting in a total UVGI dose to the surface of the Petri dishes ranging from 12 to 96 mJ/cm(2). The UVGI dose necessary to inactivate 90% of the A. flavus and A. fumigatus was 35 and 54 mJ/cm2, respectively. Conclusions: UVGI can be used to inactivate culturable fungal spores. Aspergillus flavus was more susceptible than A. fumigatus to UVGI. Significance and impact of the study: These results may not be directly correlated to the effect of UVGI on airborne fungal spores, but they indicate that current technology may not be efficacious as a supplement to ventilation unless it can provide higher doses of UVGI to kill spores traveling through the irradiated zone. [Description provided by NIOSH]
• Subjects:
  Fungi Microbiology Occupational Health Radiation Safety Ultraviolet Rays
• Keywords:
  Germicides Irradiation Microbial-test-systems Microorganisms Ultraviolet-light Ultraviolet-radiation
• ISSN:
  0008-4166
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 3 ; OSHA Region 5 ; OSHA Region 6 ; Texas ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  221-224
• Volume:
  50
• Issue:
  3
• NIOSHTIC Number:
  nn:20031578
• Citation:
  Can J Microbiol 2004 Mar; 50(3):221-224
• Contact Point Address:
  SG Gibbs, Univ Texas, Hlth Sci Ctr, Sch Publ Hlth, El Paso Reg Campus,1100 N Stanton, El Paso, TX 79902
• Federal Fiscal Year:
  2004
• Peer Reviewed:
  True
• Source Full Name:
  Canadian Journal of Microbiology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3ffdf4e42b8095af502a987a546344bf689560989714c6e6e529e08ce8758b02f60aa4ebcc940fd3893a6b53e224aedf80ef102ad34d2caa6f432ace58ae93d2
• Download URL:
  https://stacks.cdc.gov/view/cdc/185827/cdc_185827_DS1.pdf
• File Type:
  [PDF - 95.22 KB ]