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Article

Identification of a New Heavy-Metal-Resistant Strain of Geobacillus stearothermophilus Isolated from a Hydrothermally Active Volcanic Area in Southern Italy

1
Dipartimento di Biologia, Università Degli Studi di Napoli Federico II, 80139 Napoli, Italy
2
Istituto Nazionale di Geofisica e Vulcanologia, Sezione Osservatorio Vesuviano, 80125 Napoli, Italy
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(8), 2678; https://doi.org/10.3390/ijerph17082678
Received: 3 March 2020 / Revised: 9 April 2020 / Accepted: 13 April 2020 / Published: 14 April 2020
(This article belongs to the Section Environmental Health)
Microorganisms thriving in hot springs and hydrothermally active volcanic areas are dynamically involved in heavy-metal biogeochemical cycles; they have developed peculiar resistance systems to cope with such metals which nowadays can be considered among the most permanent and toxic pollutants for humans and the environment. For this reason, their exploitation is functional to unravel mechanisms of toxic-metal detoxification and to address bioremediation of heavy-metal pollution with eco-sustainable approaches. In this work, we isolated a novel strain of the thermophilic bacterium Geobacillus stearothermophilus from the solfataric mud pool in Pisciarelli, a well-known hydrothermally active zone of the Campi Flegrei volcano located near Naples in Italy, and characterized it by ribotyping, 16S rRNA sequencing and mass spectrometry analyses. The minimal inhibitory concentration (MIC) toward several heavy-metal ions indicated that the novel G. stearothermophilus isolate is particularly resistant to some of them. Functional and morphological analyses suggest that it is endowed with metal resistance systems for arsenic and cadmium detoxification. View Full-Text
Keywords: heavy metals; thermophiles; Geobacillus stearothermophilus; minimal inhibitory concentration (MIC); transmission electron microscopy (TEM) heavy metals; thermophiles; Geobacillus stearothermophilus; minimal inhibitory concentration (MIC); transmission electron microscopy (TEM)
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MDPI and ACS Style

Puopolo, R.; Gallo, G.; Mormone, A.; Limauro, D.; Contursi, P.; Piochi, M.; Bartolucci, S.; Fiorentino, G. Identification of a New Heavy-Metal-Resistant Strain of Geobacillus stearothermophilus Isolated from a Hydrothermally Active Volcanic Area in Southern Italy. Int. J. Environ. Res. Public Health 2020, 17, 2678. https://doi.org/10.3390/ijerph17082678

AMA Style

Puopolo R, Gallo G, Mormone A, Limauro D, Contursi P, Piochi M, Bartolucci S, Fiorentino G. Identification of a New Heavy-Metal-Resistant Strain of Geobacillus stearothermophilus Isolated from a Hydrothermally Active Volcanic Area in Southern Italy. International Journal of Environmental Research and Public Health. 2020; 17(8):2678. https://doi.org/10.3390/ijerph17082678

Chicago/Turabian Style

Puopolo, Rosanna, Giovanni Gallo, Angela Mormone, Danila Limauro, Patrizia Contursi, Monica Piochi, Simonetta Bartolucci, and Gabriella Fiorentino. 2020. "Identification of a New Heavy-Metal-Resistant Strain of Geobacillus stearothermophilus Isolated from a Hydrothermally Active Volcanic Area in Southern Italy" International Journal of Environmental Research and Public Health 17, no. 8: 2678. https://doi.org/10.3390/ijerph17082678

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