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- W4307276018 abstract "Abstract Background Clostridioides difficile is a spore forming bacterial species that is the major causative agent of serious infection in hospitals. C. difficile spores are highly resilient to disinfection methods and to prevent infection, common cleaning protocols use sodium hypochlorite solutions to decontaminate hospital surfaces and equipment. However, there is a balance between minimising the use of harmful chemicals to the environment and patients as well as the need to eliminate spores, which can have varying resistance properties between strains. In this work, we compare the effect of sodium hypochlorite on different C. difficile clinical isolates and the chemical's impact on spores' biochemical composition. Biochemical changes can, in turn, change spores' vibrational spectroscopic fingerprints, which can impact the possibility of detecting spores in a hospital using Raman based methods. Results First, we found that the isolates show different susceptibility to hypochlorite, with the R20291 strain, in particular, showing less than 1 log reduction in viability for a 0.5 % hypochlorite treatment, far below typically reported values for C. difficile . Second, TEM and Raman spectra analysis of hypochlorite-treated spores revealed that some hypochlorite-exposed spores remained intact and not distinguishable to controls. Finally, we saw differences in the ultra-structure of C. difficile and B. thuringiensis spores in response to hypochlorite. Conclusion This study highlights the ability of certain C. difficile spores to survive practical disinfection exposure as well as the changes in spore spectra that can be seen using Raman spectroscopy. These findings are important to consider to avoid a false-positive response when screening decontaminated areas." @default.
- W4307276018 created "2022-10-31" @default.
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- W4307276018 date "2022-10-24" @default.
- W4307276018 modified "2023-10-18" @default.
- W4307276018 title "Characterisation of Clostridioides difficile spore response to sodium hypochlorite using EM-imaging and Raman Spectroscopy" @default.
- W4307276018 doi "https://doi.org/10.21203/rs.3.rs-2174275/v1" @default.
- W4307276018 hasPublicationYear "2022" @default.
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