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Bactericidal effects of CaO (scallop-shell powder) on foodborne pathogenic bacteria

Bae, Dong-Ho, Yeon, Ji-Hye, Park, Shin-Young, Lee, Dong-Ha, Ha, Sang-Do
Archives of pharmacal research 2006 v.29 no.4 pp. 298-301
Listeria monocytogenes, antibacterial properties, bacteria, calcium oxide, disinfection, food processing equipment, foods
This study was investigated the bactericidal effects of calcium oxide (CaO) on three common foodborne pathogenic bacteria:Escherichia coli, Listeria monocytogenes, andSalmonella typhimurium. Each bacteria level was determined in a CaO solution (0.01, 0.03, 0.05, 0.10, 0.15, and 0.20% [w/v]) exposed for either 15 sec, 30 sec, 1 min, 2 min, 3 min, 5 min, 10 min, or 30 min. All three bacteria were not greatly affected by CaO solutions at concentrations of 0.01 and 0.03%, however, the decline ofE. coli (99%; 2.78 log₁₀CFU/mL),L. monocytogens (45%; 1.44 log₁₀CFU/mL), andS. typhimurium (70%; 2.08 log₁₀CFU/mL) was greatest when they were exposed to 0.05% CaO solution for 10 min. Moreover, the bactericidal action of CaO was maintained for at least 24 h of storage. The results of this study provide evidence that CaO, as a substitute for synthetic chemical substances has potential for use in the disinfection and sanitization of foods and food processing equipment.