Hygienic Effect of Periodical Draining from Auto-watering Piping for Laboratory Animal Breeding

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  • TAKIGUCHI Kazuhiko
    <I>Laboratory Animal Center, Yamagata University School of Medicine</I>
  • OHWADA Kazuo
    <I>Laboratory Animal Center, Yamagata University School of Medicine</I>

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Other Title
  • 定時的排水による自動給水配管内飲用水の清浄効果
  • テイジテキ ハイスイ ニ ヨル ジドウ キュウスイ ハイカンナイ インヨウスイ

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Abstract

To prevent the bacterial contamination of the drinking water, we developed a periodical draining machine system which were composed of the electromagnetic valve and the time switch. The machine system is able to replace standing water with fresh water on optional volumes and intervals. The total bacterial numbers of standing water were counted as an indicator of the bacterial contamination. The number of total bacteria were reduced to less than 5 per ml by working the machine system on 6-hour-interval with replacing twice as much as standing water, although more than 103 per ml of the bacteria were found when the system was not operated. It was demonstrated that the periodical draining of the machine prevented the drinking water in auto-watering piping from bacterial contamination.

Journal

  • Experimental Animals

    Experimental Animals 35 (2), 199-202, 1986

    Japanese Association for Laboratory Animal Science

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