%0 Journal Article %A Grecz, N. %A Tang, T. %T Relation of Dipicolinic Acid to Heat Resistance of Bacterial Spores %D 1970 %J Microbiology, %V 63 %N 3 %P 303-310 %@ 1465-2080 %R https://doi.org/10.1099/00221287-63-3-303 %I Microbiology Society, %X SUMMARY: Spores of five strains of Clostridium botulinum differing widely in their heat resistance contained 7·4 to 13·4 % dipicolinic acid. There appeared to be no correlation between DPA content and heat resistance of the various strains. The rate of loss of DPA during heating at 75 and 100° was consistently slower than the rate of loss of spore viability, though, in general, heat-resistant strains lost DPA less quickly than did heat-sensitive strains. At the instant of thermal death, spores still retained 28 to 99·6 % of their original DPA, though this DPA could be released on continued heating. %U https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-63-3-303