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Growth and survival of Escherichia coli and enterococci populations in the macro-alga Cladophora (Chlorophyta)

FEMS Microbiology Ecology

By:
, , , , and
DOI: 10.1016/S0168-6496(03)00214-9

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Abstract

The macro-alga Cladophora glomerata is found in streams and lakes worldwide. High concentrations of Escherichia coli and enterococci have been reported in Cladophora along the Lake Michigan shore. The objective of this study was to determine if Cladophora supported growth of these indicator bacteria. Algal leachate readily supported in vitro multiplication of E. coli and enterococci, suggesting that leachates contain necessary growth-promoting substances. Growth was directly related to the concentration of algal leachate. E. coli survived for over 6 months in dried Cladophora stored at 4°C; residual E. coli grew after mat rehydration, reaching a carrying capacity of 8 log CFU g-1 in 48 h. Results of this study also show that the E. coli strains associated with Cladophora are highly related; in most instances they are genetically different from each other, suggesting that the relationship between E. coli and Cladophora may be casual. These findings indicate that Cladophora provides a suitable environment for indicator bacteria to persist for extended periods and to grow under natural conditions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Growth and survival of Escherichia coli and enterococci populations in the macro-alga Cladophora (Chlorophyta)
Series title:
FEMS Microbiology Ecology
DOI:
10.1016/S0168-6496(03)00214-9
Volume
46
Issue:
2
Year Published:
2003
Language:
English
Contributing office(s):
Lake Michigan Ecological Research Station
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
FEMS Microbiology Ecology
First page:
203
Last page:
211
Number of Pages:
9