Occurrence of Cryptosporidium and Giardia in Sagami River and Evaluation of Their Indicators.

• HASHIMOTO Atsushi

  Graduate School of Environmental Health Sciences, Azabu University

• KAWAI Kensaku

  Daiki Co., Ltd.

• NISHIZAKI Aya

  Kanapoli Corporation

• MATSUMOTO Kaori

  Naitoh Environmental Science Co., Ltd.

• HIRATA Tsuyoshi

  Department of Health and Environmental Sciences, College of Environmental Health, Azabu University

Bibliographic Information

Other Title

• 相模川水系のクリプトスポリジウムおよびジアルジア汚染とその汚染指標の検討
• サガミガワ スイケイ ノ クリプトスポリジウム オヨビ ジアルジア オセン ト ソノ オセン シヒョウ ノ ケントウ

Abstract

In order to investigate the occurrence and indicator of protozoa in water, water samples were collected from 11 points along the Sagami River and its tributaries for 9 months. The concentrations of Cryptosporidiurn oocysts, Giardia cysts and potential indicators (presumptive Clostridium perfringens spores, Escherichia coli, coliforms, aerobic spores and turbidity) were analyzed. Cryptosporidium oocysts were detected at 10 of the 11 sampling points (GM 34 presumptive oocysts·100l^-1, 24 confirmed oocysts·100l^-1) and Giardia cysts were detected at all sampling points (GM 30 presumptive cysts·100l^-1, 12 confirmed cysts·100l^-1). Based on a regression analysis, the concentrations of presumptive C.perfringens spores and E.coli were significantly correlated with the concentrations of protozoa. In a multiple regression analysis, the concentration of presumptive C.perfringens spores, E.coli and aerobic spores were selected as explanatory variables for the protozoan concentrations. The results indicated that presumptive C.perfringens spores, aerobic spores and E.coli were useful indicators for protozoan contamination.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 22 (4), 282-287, 1999

  Japan Society on Water Environment

Keywords

• <i>Cryptosporidium</i>
• <i>Giardia</i>
• protozoan pollution
• indicator bacteria
• <i>Clostridium perfringens</i>

Details

• CRID: 1390001205081580544
• NII Article ID: 10004452071
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.22.282
• COI: 1:CAS:528:DyaK1MXksVWrtL4%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL BIB ID: 4693055
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4693055
• Web Site: https://www.jstage.jst.go.jp/article/jswe/22/4/22_4_282/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed