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Buhr, T.L.; Minter, Z.A.; Kennihan, N.L.; Young, A.A.; Borgers‐Klonkowski, E.L.; Osborn, E.B.; Bohmke, M.D.; Hamilton, S.M.; Kimani, M.B.; Miller, C.T.; Mackie, R.S.; Innocenti, J.M.; Bensman, M.D.; Lilly, S.D.
Journal of applied microbiology, January 2020, 2020-Jan, 2020-01-00, 20200101, Letnik: 128, Številka: 1Journal Article
Aims To add a spore germination step in order to reduce decontamination temperature and time requirements compared to the current hot, humid air decontamination parameters, which are 75–80°C, ≥72 h, 70–90% RH, down to ≤60°C and ≤24 h total decontamination time. Methods and Results Bacillus anthracis spore germination with l‐alanine+inosine+calcium dipicolinate (CaDPA) was quantified at 0–40°C, several time points and spore concentrations of 5–9 log10 per ml. Germination efficiency at 0–40°C was >99% at <8 log10 spores per ml. The temperature optimum was 20°C. Germination efficiency was significantly higher but slower at 0°C compared to ≥30°C at ≥8 log10 spores per ml. A single germinant application followed by 60°C, 1‐h treatment consistently inactivated >2 log10 (>99%) of spores. However, a repeat application of germinant was needed to achieve the objective of ≥6 log10 spore inactivation out of a 7 log10 challenge (≥99·9999%) for ≤24 h total decontamination time for nylon and aircraft performance coating. Conclusions l‐alanine+inosine+CaDPA stimulated germination across wide temperature and spore concentration ranges. Significance and Impact of the Study Germination expands the scope of spore decontamination to include materials from any industry sector that can be sprayed with an aqueous germinant solution.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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