Role of Dipicolinic Acid in Heat Resistance of Spores of Clostridium botulinumand Clostridium sporogenesPA3679 by Thermal and Pressure-assisted Thermal Processing

•Released DPA increased with increased treatment time for each process temperature.•Positive correlation between DPA release and log reduction was observed.•Correlation (QC-B, 610-F, and Giorgio-A) after pressure-assisted thermal treatment.•No correlation was found for PA3679 after pressure-assisted thermal treatment.•DPA is found in unprocessed prepared spore crop suspensions in prolonged cold storage.