Irradiation of spores of Bacillus cereus and Bacillus subtilis with electron beams
Lara, J. de; Fernandez, P.S.; Periago, P.M.; Palop, A.
Innovative Food Science and Emerging Technologies 3(4): 379-384
ISSN/ISBN: 1466-8564 DOI: 10.1016/s1466-8564(02)00053-x
The effect of irradiation with accelerated electrons on Bacillus cereus and Bacillus subtilis spore counts and spore heat resistance was investigated. Spore counts reduced approximately two log cycles for B. cereus and up to five log cycles for B. subtilis after a radiation dose of 7.6 kGy, with D10 values ranging from 1.5 to 3.8 kGy. Radiation had an important heat-sensitizing effect on bacterial spores. After a 3.3 kGy treatment DT values were reduced more than three times for both B. cereus and B. subtilis spores.