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Applied and Environmental Microbiology, January 2003, p. 683-685, Vol. 69, No. 1
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.1.683-685.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Comparison of UV Inactivation of Spores of Three Encephalitozoon Species with That of Spores of Two DNA Repair-Deficient Bacillus subtilis Biodosimetry Strains

Marilyn M. Marshall,1* Samuel Hayes,2 Jackie Moffett,1 Charles R. Sterling,1 and Wayne L. Nicholson1

Department of Veterinary Science and Microbiology, University of Arizona, Tucson, Arizona 85721,1 U.S. Environmental Protection Agency, Cincinnati, Ohio 452682

Received 14 June 2002/ Accepted 18 October 2002

When exposed to 254-nm UV, spores of Encephalitozoon intestinalis, Encephalitozoon cuniculi, and Encephalitozoon hellem exhibited 3.2-log reductions in viability at UV fluences of 60, 140, and 190 J/m2, respectively, and demonstrated UV inactivation kinetics similar to those observed for endospores of DNA repair-defective mutant Bacillus subtilis strains used as biodosimetry surrogates. The results indicate that spores of Encephalitozoon spp. are readily inactivated at low UV fluences and that spores of UV-sensitive B. subtilis strains can be useful surrogates in evaluating UV reactor performance.


* Corresponding author. Mailing address: Department of Veterinary Science and Microbiology, Building 90, Room 304, University of Arizona, Tucson, AZ 85721. Phone: (520) 621-4439. Fax: (520) 621-6366. E-mail: marshalm{at}u.arizona.edu.


Applied and Environmental Microbiology, January 2003, p. 683-685, Vol. 69, No. 1
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.1.683-685.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.




This article has been cited by other articles:

  • Hoffman, R. M., Marshall, M. M., Polchert, D. M., Helen Jost, B. (2003). Identification and Characterization of Two Subpopulations of Encephalitozoon intestinalis. Appl. Environ. Microbiol. 69: 4966-4970 [Abstract] [Full Text]