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Decontamination of Diatom Algae Cultures Contaminated with the Kinetoplastid Bodo saltans Ehrenberg, 1832

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Abstract—

Cultivation of diatom algae is associated with many problems, one of which concerns the contamination of cultures with various microorganisms. A representative of kinetoplastids, the free-living bacteriotroph Bodo saltans Ehrenberg, 1832, can often be found among contaminants. In the case when B. saltans reaches a high abundance, diatom cells cease to divide, some of them die, becoming a substrate for the development of bacteria, and then the substrate for the next trophic link: kinetoplastids. For the decontamination of diatom cultures, we used amphotericin B, a polyene macrocyclic antibiotic active against some protozoa and fungi. The effect of the drug on B. saltans in cultures of eight species of diatoms, including Ardissonea crystallina (C. Agardh) Grunow, Climaconeis scalaris (Brébisson) E.J. Cox, Entomoneis paludosa (W. Smith) Reimer, Haslea karadagensis Davidovich, Gastineau & Mouget, Pleurosigma aestuarii (Brébisson ex Kützing) W. Smith, Pleurosigma sp., Pseudo-nitzschia calliantha Lundholm, Moestrup & Hasle, and P. pungens (Grunow ex P.T. Cleve) Hasle, was investigated. The rate of division of diatom cells exposed to amphotericin B, depending on the dose and duration of exposure, was experimentally determined. Recommendations on the use of amphotericin B for the decontamination of diatom cultures from B. saltans are given.

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Funding

The study was carried out within the framework of the state target on the topic “Study of the Fundamental Physical, Physiological, Biochemical, Reproductive, Population, and Behavioral Characteristics of Marine Hydrobionts,” state registration number no. АААА-А19-119012490045-0.

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Authors and Affiliations

  1. Federal State Budget Scientific Institution Vyazemsky Karadag Scientific Station–Nature Reserve of the Russian Academy of Sciences, 298188, Kurortnoe, Russia

    N. A. Davidovich, O. I. Davidovich, Yu. A. Podunay & S. L. Polyakova

  2. Natural Sciences Research and Educational Center and Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, 70-383, Szczecin, Poland

    N. A. Davidovich & R. Gastineau

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  1. N. A. Davidovich
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  2. O. I. Davidovich
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  3. Yu. A. Podunay
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  4. S. L. Polyakova
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  5. R. Gastineau
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Correspondence to N. A. Davidovich.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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The authors declare that they have no conflict of interest.

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Translated by V. Mittova

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Davidovich, N.A., Davidovich, O.I., Podunay, Y.A. et al. Decontamination of Diatom Algae Cultures Contaminated with the Kinetoplastid Bodo saltans Ehrenberg, 1832. Moscow Univ. Biol.Sci. Bull. 74, 63–68 (2019). https://doi.org/10.3103/S0096392519020032

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  • DOI: https://doi.org/10.3103/S0096392519020032

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