Effects of Gargling with Tap Water

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  • Kurono Yuichi
    Department of Otolaryngology, Head and Neck surgery, Kagoshima University Graduate School of Medical and Dental Sciences
  • Yamashita Masaru
    Department of Otolaryngology, Head and Neck surgery, Kagoshima University Graduate School of Medical and Dental Sciences

Bibliographic Information

Other Title
  • 水道水による含嗽の効果
  • スイドウスイ ニ ヨル ガンソウ ノ コウカ
Published
2022-08-20
DOI
  • 10.3950/jibiinkotokeibu.125.8_1298
Publisher
Japanese Society of Otorhinolaryngology-Head and Neck Surgery

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Description

<p>　Tap water disinfected with chlorine is known to have bactericidal activity. However, it has not yet been clarified if gargling with tap water has antiseptic properties. Therefore, the bactericidal activity of tap water and of tap water after various processings was investigated using Streptococcus pneumoniae and the concentrations of residual chlorine were compared. Further, the numbers of bacteria adhering to the scraped buccal mucosal epithelial cells three hours after gargling with tap water, purified water, and gargle medicines were counted and compared. The results revealed that the bactericidal activity disappeared when residual chlorine was removed by boiling. Residual chlorine was not detected in the tap water after gargling or addition of saliva, and there was no difference in the number of bacteria adherent to the buccal epithelial cells between tap water gargling and purified water gargling. The findings suggest that gargling with tap water does not have a bactericidal effect due to deactivation of the residual chlorine by saliva, even though tap water containing residual chlorine has bactericidal activity.</p>

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