Isolation of Legionella and Free-Living Amoebae at Hot Spring Spas in Kanagawa, Japan

  • KUROKI Toshiro
    Department of Bacteriology and Pathology, Kanagawa Prefectural Public Health Laboratory
  • YAGITA Kenji
    Department of Parasitology, National Institute of Infectious Diseases
  • YABUUCHI Eiko
    Department of Microbiology and Immunology, Aichi Medical University
  • AGATA Kunio
    Tsukuba Technical Research Center, Aquas Co. Ltd.
  • ISHIMA Tomoki
    Tsukuba Technical Research Center, Aquas Co. Ltd.
  • KATSUBE Yasuji
    Laboratory of Veterinary Public Health, College of Bioresouce Sciences, University of Nihon
  • ENDO Takuro
    Department of Parasitology, National Institute of Infectious Diseases

Bibliographic Information

Other Title
  • 神奈川県下の温泉浴槽水中における<I>Legionella</I>属菌と自由生活性アメーバ調査
  • 神奈川県下の温泉浴槽水中におけるLegionella属菌と自由生活性アメーバ調査
  • カナガワ ケンカ ノ オンセン ヨクソウ スイチュウ ニ オケル Legion

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Abstract

Microbiological contamination of hot spring bath water is a public health concern. A province-wide survey was carried out to determine the extent and distribution of both Legionella and free-living amoebae contamination. Among 30 samples of hot spring bath from 12 sites in Kanagawa, Japan, L. pneumophila was detected in 21 water samples from 11 sites, ranging from 101-103CFU/100ml. Serogroups 3, 5 and 6 of L. pneumophila were predominantly isolated from the samples. Naegleria (46.7%), Platyamoeba (33.3%), Acanthamoeba (10.0%) and 2 other genera of free-living amoebae were detected in 22 samples from 11 sites. One or more genera of host amoebae of Legionella occurred in 17 samples (56.7%) from 9 sites. Another thing to be noted is that 13 water samples contained N. lovaniensis. Although N. lovaniensis is nonpathogenic, it is considered an indicator organism for places that are suitable for the growth of N. fowleri, a causative agent of primary amoebic meningoencephalitis in man.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 72 (10), 1050-1055, 1998

    The Japanese Association for Infectious Diseases

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