Enhancement of bactericidal effects of sodium hypochlorite in chiller water with food additive grade calcium hydroxide

An alkaline agent, namely food additive grade calcium hydroxide (FdCa(OH)2) in solution at 0.17%, was evaluated for its bactericidal efficacies in chiller water with sodium hypochlorite (NaOCl) at a concentration of 200 ppm total residual chlorine. Without organic material presence, NaOCl could inac...

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Bibliographic Details
Published in:Journal of Veterinary Medical Science 2017, Vol.79(6), pp.1019-1023
Main Authors: TOYOFUKU, Chiharu, ALAM, Md. Shahin, YAMADA, Masashi, KOMURA, Miyuki, SUZUKI, Mayuko, HAKIM, Hakimullah, SANGSRIRATANAKUL, Natthanan, SHOHAM, Dany, TAKEHARA, Kazuaki
Format: Article
Language:English
Subjects:
Animals
Anti-Bacterial Agents - pharmacology
Avian Pathology
Bacteria
bacterial disinfection
Calcium
Calcium hydroxide
Calcium Hydroxide - pharmacology
Chickens - microbiology
Chlorine
Disinfectants - pharmacology
Escherichia coli
Escherichia coli - drug effects
Fetal calf serum
food additive grade calcium hydroxide
Food Additives
Food contamination
Food Handling
Food Microbiology
inhibition of cross contamination
Microbial Sensitivity Tests
Microorganisms
Residual chlorine
Salmonella
Salmonella - drug effects
Salmonella Infantis
Slaked lime
Sodium
Sodium hypochlorite
Sodium Hypochlorite - pharmacology
synergistic effect
Temperature
Water
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Summary:An alkaline agent, namely food additive grade calcium hydroxide (FdCa(OH)2) in solution at 0.17%, was evaluated for its bactericidal efficacies in chiller water with sodium hypochlorite (NaOCl) at a concentration of 200 ppm total residual chlorine. Without organic material presence, NaOCl could inactivate Salmonella Infantis and Escherichia coli within 5 sec, but in the presence of fetal bovine serum (FBS) at 0.5%, the bactericidal effects of NaOCl were diminished completely. FdCa(OH)2 solution required 3 min to inactivate bacteria with or without 5% FBS. When NaOCl and FdCa(OH)2 were mixed at the final concentration of 200 ppm and 0.17%, respectively, the mixed solution could inactivate bacteria at acceptable level (103 reduction of bacterial titer) within 30 sec in the presence of 0.5% FBS. The mixed solution also inhibited cross-contamination with S. Infantis or E. coli on chicken meats. It was confirmed and elucidated that FdCa(OH)2 has a synergistic effect together with NaOCl for inactivating microorganisms.
ISSN:0916-7250
1347-7439
DOI:10.1292/jvms.17-0089