Growth-Inhibitory Activity of Sodium Chlorite on Several Food Poisoning Bacteria

Hosoi, Masaharu; Yoshida, Masayuki; Takahata, Toshihiro; Hoshino, Toshiaki; Imada, Katsumi

doi:10.3358/shokueishi.31.469

Cited by 2 publications

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“…Therefore, a gentle alternative chlorine-based disinfectant was explored to maintain hygienic environment. Sodium chlorite (NaClO 2 ) has a lower reactivity with organic matter than NaClO; therefore, the efficacy of NaClO 2 in disinfecting microorganisms is maintained in the presence of organic matters (Hasegawa et al, 1989;Hosoi et al, 1990) . Accordingly, NaClO 2 is a promising alternative disinfectant that is less corrosive than NaClO.…”

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Efficacy of sodium chlorite in inactivating Vibrio parahaemolyticus attached to polyethylene terephthalate surfaces

TAKAHASHI,

FUKUZAKI

2023

Journal of Microorganism Control

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The inactivation of Vibrio parahaemolyticus cells attached to a polyethylene terephthalate (PET) disc in a sodium chlorite (NaClO 2 ) solution was kinetically studied in a weakly acidic pH range of 4.0 -6.5. The logarithmic reduction in the survival ratio depended on the concentration-time product. All inactivation curves showed a linear reduction phase, and the reduction in viable cells was greater than 4-log. No significant desorption of attached cells was observed during the inactivation treatment. The first-order inactivation rate constant (k) increased by approximately 4.5-fold for every 1.0 unit fall in pH. At all pH values, the k values calculated for the attached cells were approximately half of those for the unattached cells. These findings indicate that a weakly acidic NaClO 2 solution is effective in inactivating bacteria attached to hard surfaces.Keywords ： sodium chlorite / inactivation efficacy / Vibrio parahaemolyticus / polyethylene terephthalate / microbial calorimetry.

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confidence: 99%

Efficacy of sodium chlorite in inactivating Vibrio parahaemolyticus attached to polyethylene terephthalate surfaces

TAKAHASHI,

FUKUZAKI

2023

Journal of Microorganism Control

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“…NaClO 2 has a lower reactivity with organic matter than NaClO, so that the efficacy of NaClO 2 in disinfecting processes is maintained in the presence of organic matter Hasegawa, 1989;Hosoi, 1990 . Therefore, it is likely that NaClO 2 is more suitable than NaClO for the inactivation of the surfaces of food, such as meat, vegetables, and marine products.…”

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confidence: 99%

Kinetics of the Inactivation of Vibrio parahaemolyticus in Weakly Acidic Sodium Chlorite Solution

2017

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The kinetics of the inactivation of Vibrio parahaemolyticus in sodium chlorite NaClO 2 solution was studied in the weakly acidic pH range of 4.0 to 6.5 and at various temperatures. The logarithmic reduction of the survival ratio depended on the concentration-time product, and all the inactivation curves showed a linear reduction phase. The first-order inactivation rate constant k increased by approximately twice for every 0.44 unit fall in pH. During the inactivation experiments, no formation of chlorine dioxide occurred. These data indicated that undissociated HClO 2 was the active species governing the inactivation of V. parahaemolyticus. It was also shown that the use of weakly acidic NaClO 2 solutions containing high concentrations of ionized ClO 2 -gave slower kinetics of the inactivation, whereas it could achieve the significant reduction of viable cells of more than 4-log. The k value showed an Arrhenius-type temperature dependence in the temperature range of 5 to 40 . The apparent activation energy for the inactivation of V. parahaemolyticus was estimated to be 43.5 kJ/mol. The k value increased by approximately 1.8 times for every 10 rise in temperature.

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Growth-Inhibitory Activity of Sodium Chlorite on Several Food Poisoning Bacteria

Cited by 2 publications

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Efficacy of sodium chlorite in inactivating <i>Vibrio parahaemolyticus</i> attached to polyethylene terephthalate surfaces

Efficacy of sodium chlorite in inactivating <i>Vibrio parahaemolyticus</i> attached to polyethylene terephthalate surfaces

Kinetics of the Inactivation of <i>Vibrio parahaemolyticus</i> in Weakly Acidic Sodium Chlorite Solution

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