Temporal dynamics of Campylobacter and Arcobacter in a freshwater lake that receives fecal inputs from migratory geese

Mayumi Kobayashi, Qian Zhang, Takahiro Segawa, Mitsuto Maeda, Reiko Hirano, Satoshi Okabe, Satoshi Ishii

Research output: Contribution to journalArticlepeer-review

Abstract

Migratory geese could influence the microbiological water quality; however, their impacts on pathogen dynamics remain largely unknown. In this study, we analyzed the population dynamics of Campylobacter and Arcobacter group bacteria (AGB) in a freshwater lake in Japan over two years. The bacteria were quantified by using both culture-dependent and -independent methods. The potential sources of these bacteria were examined by a high-throughput flaA sequencing approach. Campylobacter was abundantly detected both by culture-dependent and -independent methods in the lake, especially when migratory geese were present in the lake. High-throughput flaA sequencing suggests that geese were the likely source of Campylobacter in the lake. The viable population of Campylobacter exceeds the concentrations that can potentially cause 10−4 infections per person per year when water is used to grow fresh vegetables. The occurrence of AGB, on the other hand, was not directly related to the population of migratory geese. AGB were not detected in geese fecal samples. Diverse AGB flaA genotypes occurred in the lake over multiple seasons. Our results suggest that AGB likely comprise a part of the indigenous microbial population of the lake and grow in response to high nutrient, warm temperature, and low dissolved oxygen concentrations in the lake. Geese therefore can indirectly impact the AGB population by providing nutrients to cause eutrophication and lower the dissolved oxygen concentration. Since geese travel long-distance and disperse their fecal microbiota and nutrients to wide areas, they may have significant impacts on water quality and public health.

Original languageEnglish (US)
Article number118397
JournalWater Research
Volume217
DOIs
StatePublished - Jun 15 2022

Bibliographical note

Funding Information:
We thank Ayumi Akiyoshi (National Institute of Polar Research, Japan) and Akiho Miyamura (Hokkaido University) for technical assistance, and Katsumi Ushiyama (Miyajimanuma Waterbird & Wetland Center, Japan) for providing the geese count data. This work was supported in part by Mitsui Co. & Ltd., Environment Fund, MnDRIVE Initiative of the University of Minnesota, and Healthy Foods Healthy Lives Institute of the University of Minnesota.

Funding Information:
We thank Ayumi Akiyoshi (National Institute of Polar Research, Japan) and Akiho Miyamura (Hokkaido University) for technical assistance, and Katsumi Ushiyama (Miyajimanuma Waterbird & Wetland Center, Japan) for providing the geese count data. This work was supported in part by Mitsui Co. & Ltd. Environment Fund, MnDRIVE Initiative of the University of Minnesota, and Healthy Foods Healthy Lives Institute of the University of Minnesota.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Arcobacter
  • Campylobacter
  • Fecal pollution
  • Microbial source tracking
  • Migratory birds
  • Water quality

PubMed: MeSH publication types

  • Journal Article

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