C. difficile: Disinfectants, attachment and strain variations

In this week's episode, Martin talks to Dr Tina Joshi, Associate Professor of Molecular Microbiology in Peninsula Dental School at the University of Plymouth, UK. We discuss her longstanding interest in Clostridioides difficile and her many publications, one of which on the effectiveness of hypochlorite (or lack of it) on spores has been widely covered in the media. We chat about spore attachment to surfaces, the effect of disinfectants and the differences between strains. Some of Tina's papers are listed here. Joshi LT, Phillips DS, Williams CF, Alyousef A, Baillie L. Contribution of spores to the ability of Clostridium difficile to adhere to surfaces. Appl Environ Microbiol 2012;78(21):7671-9. https://doi.org/10.1128/AEM.01862-12 Joshi LT, Welsch A, Hawkins J, Baillie L. The effect of hospital biocide sodium dichloroisocyanurate on the viability and properties of Clostridium difficile spores. Lett Appl Microbiol 2017;65(3):199-205. https://doi.org/10.1111/lam.12768 Dyer C, Hutt LP, Burky R, Joshi LT. Biocide Resistance and Transmission of Clostridium difficile Spores Spiked onto Clinical Surfaces from an American Health Care Facility. Appl Environ Microbiol 2019;85(17). https://doi.org/10.1128/AEM.01090-19 Waterfield S, Ahmed H, Jones IA, Burky R, Joshi LT. Isolation of Clostridioides difficile PCR Ribotype 027 from single-use hospital gown ties. J Med Microbiol 2022;71(6). https://doi.org/10.1099/jmm.0.001550 Ahmed H, Joshi LT. Clostridioides difficile spores tolerate disinfection with sodium hypochlorite disinfectant and remain viable within surgical scrubs and gown fabrics. Microbiology (Reading) 2023;169(11). https://doi.org/10.1099/mic.0.001418 Malyshev D, Jones IA, McKracken M, Oberg R, Harper GM, Joshi LT, et al. Hypervirulent R20291 Clostridioides difficile spores show disinfection resilience to sodium hypochlorite despite structural changes. BMC Microbiol 2023;23(1):59. https://doi.org/10.1186/s12866-023-02787-z.