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Carbon load in aquatic ecosystems affects the diversity and biomass of water biofilm consortia and the persistence of the pathogen Campylobacter jejuni within them

Carbon load in aquatic ecosystems affects the diversity and biomass of water biofilm consortia and the persistence of the pathogen Campylobacter jejuni within them
Carbon load in aquatic ecosystems affects the diversity and biomass of water biofilm consortia and the persistence of the pathogen Campylobacter jejuni within them
The influence of carbon load on autochthonous water microflora population distribution and diversity, and on the persistence of Campylobacter jejuni, was examined with a two-stage aquatic biofilm model. Serine was chosen since it is a carbon source utilised by C. jejuni and concentrations were chosen to reflect upper limits of amino acid load reported in surface water. The total viable count of the autochthonous biofilm microflora increased with increasing serine concentration (10-fold and 20-fold with 5nM and 5μM serine, respectively), as did the counts of the microflora in the planktonic phase. Differences in biofilm species distribution as determined by culture were small with changes in temperature or the addition of serine; but was markedly affected by serine as determined by light microscopy, becoming more luxuriant and dominated by long filamentous cells. The addition of serine to the water significantly and progressively reduced the persistence of C. jejuni, which decreased by 25% and 50% with serine concentrations of 5 nM and 5 μM respectively. We have demonstrated that carbon load affects the species diversity and density of both the planktonic and biofilm phase of aquatic autochthonous microflora. Although the survival of C. jejuni in water in a culturable form was sufficient for this to be an important vehicle for its transmission, carbon load significantly influenced survival an increase in serine concentration significantly reduced survival.
0267-4440
161S-167S
Buswell, C. M.
0d632734-a8a8-4f9d-8eef-6c25b00fe725
Herlihy, Y.
4522a096-5dce-40ae-ad9b-a321ac6aced2
Keevil, C. W.
cb7de0a7-ce33-4cfa-af52-07f99e5650eb
Marsh, P. D.
9d226405-bfd2-432b-ac22-ea619f706805
Leach, S. A.
6bf5fd7a-7d6f-431f-af65-41e0f98e8384
Buswell, C. M.
0d632734-a8a8-4f9d-8eef-6c25b00fe725
Herlihy, Y.
4522a096-5dce-40ae-ad9b-a321ac6aced2
Keevil, C. W.
cb7de0a7-ce33-4cfa-af52-07f99e5650eb
Marsh, P. D.
9d226405-bfd2-432b-ac22-ea619f706805
Leach, S. A.
6bf5fd7a-7d6f-431f-af65-41e0f98e8384

Buswell, C. M., Herlihy, Y., Keevil, C. W., Marsh, P. D. and Leach, S. A. (1999) Carbon load in aquatic ecosystems affects the diversity and biomass of water biofilm consortia and the persistence of the pathogen Campylobacter jejuni within them. Journal of Applied Microbiology Symposium Supplement, 85 (28), 161S-167S.

Record type: Article

Abstract

The influence of carbon load on autochthonous water microflora population distribution and diversity, and on the persistence of Campylobacter jejuni, was examined with a two-stage aquatic biofilm model. Serine was chosen since it is a carbon source utilised by C. jejuni and concentrations were chosen to reflect upper limits of amino acid load reported in surface water. The total viable count of the autochthonous biofilm microflora increased with increasing serine concentration (10-fold and 20-fold with 5nM and 5μM serine, respectively), as did the counts of the microflora in the planktonic phase. Differences in biofilm species distribution as determined by culture were small with changes in temperature or the addition of serine; but was markedly affected by serine as determined by light microscopy, becoming more luxuriant and dominated by long filamentous cells. The addition of serine to the water significantly and progressively reduced the persistence of C. jejuni, which decreased by 25% and 50% with serine concentrations of 5 nM and 5 μM respectively. We have demonstrated that carbon load affects the species diversity and density of both the planktonic and biofilm phase of aquatic autochthonous microflora. Although the survival of C. jejuni in water in a culturable form was sufficient for this to be an important vehicle for its transmission, carbon load significantly influenced survival an increase in serine concentration significantly reduced survival.

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Published date: 8 July 1999

Identifiers

Local EPrints ID: 429844
URI: http://eprints.soton.ac.uk/id/eprint/429844
ISSN: 0267-4440
PURE UUID: 62ecd804-ac8d-49be-93c8-c36793acdc51
ORCID for C. W. Keevil: ORCID iD orcid.org/0000-0003-1917-7706

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Date deposited: 08 Apr 2019 16:30
Last modified: 07 Oct 2020 08:31

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