Chlorine Dioxide Inactivation ofBacillusandClostridiumSpores

摘要

ABSTRACTBacillus cereusT and F4810/72,B. stearothermophilusATCC 1518, andClostridium perfringensNCTC 8798 spore inactivation by 20, 50, and 80 mg chlorine dioxide (ClO2)/L at three pH values (4.5, 6.5, 8.5) were evaluated. ClO2concentration, species and sporulation medium significantly (p<0.001) affect spore sensitivity.B. cereusT sporulated in Modified G medium andB. stearothermophilusATCC 1518 are similarly ClO2sensitive, and each is significantly more sensitive than Fortified Nutrient Agar‐sporulatedB. cereusT and F4810/72. TheBacillusspore populations are more ClO2sensitive thanC. perfringensspore populations. Treatment pH affectsC. perfringensbut notBacillusinactivation. Spores lacking intact coats are significantly more ClO2sensitive than the strains with coats intac