Huang J, Park GW, Jones RM, Fraser AM, Vinjé J, Jiang X. Efficacy of EPA-registered disinfectants against two human norovirus surrogates and Clostridioides difficile endospores.
J Appl Microbiol 2022;
132:4289-4299. [PMID:
35279925 PMCID:
PMC9119914 DOI:
10.1111/jam.15524]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/04/2022] [Accepted: 03/10/2022] [Indexed: 11/27/2022]
Abstract
AIMS
To determine the efficacy of a panel of nine EPA-registered disinfectants against two human norovirus (HuNoV) surrogates (feline calicivirus [FCV] and Tulane virus [TuV]) and Clostridioides difficile endospores.
METHODS AND RESULTS
Nine EPA-registered products, five of which contained H2 O2 as active ingredient, were tested against infectious FCV, TuV and C. difficile endospores using two ASTM methods, a suspension and carrier test. Efficacy claims against FCV were confirmed for 8 of 9 products. The most efficacious product containing H2 O2 as ingredient achieved a >5.1 log reduction of FCV and >3.1 log reduction of TuV after 5 min, and >6.0 log reduction of C. difficile endospores after 10 min. Of the five products containing H2 O2 , no strong correlation (R2 = 0.25, p = 0.03) was observed between disinfection efficacy and H2 O2 concentration. Addition of 0.025% ferrous sulphate to 1% H2 O2 solution improved efficacy against FCV, TuV and C. difficile.
CONCLUSION
Disinfectants containing H2 O2 are the most efficacious disinfection products against FCV, TuV and C. difficile endospores. Product formulation, rather than the concentration of H2 O2 in a product, impacts the efficacy of a disinfection product.
SIGNIFICANCE AND IMPACT OF STUDY
H2 O2 -based disinfectants are efficacious against surrogate viruses for HuNoV and C. difficile endospores.
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