Ultraviolet germicidal irradiation susceptibility of methicillin-resistant Staphylococcus aureus compared with methicillin-susceptible S. Aureus

Christopher F. Green, Laura A. Elbe, Tyler D. Neal, John J. Lowe, Shawn G. Gibbs

Research output: Contribution to journalComment/debatepeer-review

1 Scopus citations

Abstract

Antibiotic misuse and overuse in both the healthcare and agricultural fields have dramatically increased the prevalence of antibiotic resistance in human pathogens. Two strains of methicillin-resistant Staphylococcus aureus (MRSA) (ATCC 43330 and a wild-type) and 1 strain of methicillin-susceptible S. aureus (ATCC 25923) were challenged (9 runs in triplicate) in a preliminary study with ultraviolet germicidal irradiation (UVGI) doses ranging from 0.25 to 3.00 mJ/cm2. The mean percent kill was calculated for each strain when compared with the control plates (no exposure to UVGI). Then, each strain was challenged (22 runs in triplicate) with UVGI doses of 2.00, 2.50, and 3.00 mJ/cm2. The results suggest a difference between the doses required to disinfect surfaces with each strain. Assuming a standard error rate of α = 0.05, there was a significant difference in variance between the MRSA (ATCC 43330 and wild type) strains and the S. aureus (ATCC 25923) methicillin-susceptible strain.

Original languageEnglish (US)
Pages (from-to)871-875
Number of pages5
JournalCanadian journal of microbiology
Volume61
Issue number11
DOIs
StatePublished - Jul 22 2015

Keywords

  • Methicillin-resistant Staphylococcus aureus
  • Staphylococcus aureus
  • Ultraviolet germicidal irradiation

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Genetics

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