Death, injury and revival of chemically treated Bacillus subtilis spores

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Abstract
The resistance of spores of B. subtilis NCTC 10073 to glutaraldehyde, sodium hypochlorite and povidone-iodine was compared. Revival of treated spores was examined by use of defined germination media and conditions, protein denaturing agents, ultrasonics and heat. Revival, obtained after treatment with each of the 3 chemical agents, orginated under different sets of conditions and was of 2 recognizably distinct types. The results, including the evidence of EM, are discussed in terms of chemical-spore reactivity and the implications on their use and suitability as chemical sterilizers.