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Survival of Enterococcus faecalis in Seawater Microcosms Is Limited in the Presence of Bacterivorous Zooflagellates

Abstract : The survival and persistence of growing and starved cells of Enterococcus faecalis in untreated and differentially filtered (20 μm, 5 μm, 3 μm, 1.2 μm, and 0.1 μm) seawater was analyzed in samples taken at different times over a 1-year period by plate counts and scanning electron microscopy. Whereas seawater filtered through a 0.1-μm mesh was not at all or only slightly bactericidal during incubation at 16°C in the dark, culturability of E. faecalis in the other systems decreased as a function of increasing pore size of the filters. Recovery of culturable, glucose pre-starved cells was always higher than that of cells harvested from the exponential growth phase. Electron microscopic analysis showed that the disappearance of enterococci appeared related to the presence and multiplication of various zooflagellates.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02182354
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Submitted on : Friday, July 12, 2019 - 4:40:45 PM
Last modification on : Thursday, April 2, 2020 - 4:34:02 PM

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A. Hartke, S. Lemarinier, Vianney Pichereau, Y. Auffray. Survival of Enterococcus faecalis in Seawater Microcosms Is Limited in the Presence of Bacterivorous Zooflagellates. Current Microbiology, Springer Verlag, 2002, 44 (5), pp.329-335. ⟨10.1007/s00284-001-0018-4⟩. ⟨hal-02182354⟩

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