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Survival of the NASA Mars Odyssey isolate Acinetobacter radioresistens 50v1 on different spaceflight relevant antimicrobial surfaces

Hoef-Emden, M. and Moeller, R. (2017) Survival of the NASA Mars Odyssey isolate Acinetobacter radioresistens 50v1 on different spaceflight relevant antimicrobial surfaces. In: BIOspektrum - Das Magazin für Biowissenschaften - Abstractbook - Sonderausgabe (D13808), p. 140. Springer. MICROBIOLOGY AND INFECTION 2017, 5th Joint Conference of the DGHM & VAAM, VAAM Annual Meeting 2017, 69th Annual Meeting of the DGHM, 05-08-March 2017, Würzburg, Germany. ISSN 0947-0867

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Abstract

Since many years, human mankind travels to space. One of our mayor interests is the health of astronauts and the protection of the spacecraft. Apart from external influences, the microbial burden inside of the International Space Station (ISS) may be dangerous and must be limited to a minimum. To ensure the status and the protection of the crew as well as the spacecraft itself, it is necessary to determine the survival of microorganisms on different surfaces. Microorganisms are constantly changing their strategy of survival, primarily induced by extreme environmental conditions, such as space conditions, compared to their terrestrial habitats. However, the increased levels in resistance and robustness possibly play a sensitive role in evolving new virulence factors in the space environment. One of the bacteria on the NASA Mars Odyssey spacecraft, which have been isolated, is the Gram-negative, non-motile bacterium Acinetobacter radioresistens. Apart from Deinococcus radiodurans, A. radioresistens shows similar levels in radiation and oxidative stress tolerance (McCoy et al., 2012). In our work, we used the strain 50v1, isolated from the surface of the Mars Odyssey spacecraft as well as the type strain DSM6976, which was isolated on Earth from cotton and soil samples. We investigated the resistance regarding in their desiccation tolerance on metallic surfaces including materials with different antimicrobial properties. For those experiments we exposed and desiccated both strains on the different surfaces (such as copperand silver-containing materials) and determined the survival over different time points. First results show a high resistance of the spacecraft isolated strain compared to the type strain. These results give implications about the higher survivability of environmental microorganisms and highlight the essence of bioburden reduction and improve sterilization approaches/techniques for upcoming space exploration missions towards the search for life outside Earth.

Item URL in elib:https://elib.dlr.de/118060/
Document Type:Conference or Workshop Item (Poster)
Title:Survival of the NASA Mars Odyssey isolate Acinetobacter radioresistens 50v1 on different spaceflight relevant antimicrobial surfaces
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoef-Emden, M.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (dlr), Cologne, GermanyUNSPECIFIED
Moeller, R.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (dlr), Cologne, Germany; ralf.moeller (at) dlr.dehttps://orcid.org/0000-0002-2371-0676
Date:2017
Journal or Publication Title:BIOspektrum - Das Magazin für Biowissenschaften - Abstractbook - Sonderausgabe
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:p. 140
Publisher:Springer
ISSN:0947-0867
Status:Published
Keywords:survivability of environmental microorganisms, spaceflight relevant antimicrobial surfaces, bioburden reduction, Acinetobacter radioresistens 50v1, ISS
Event Title:MICROBIOLOGY AND INFECTION 2017, 5th Joint Conference of the DGHM & VAAM, VAAM Annual Meeting 2017, 69th Annual Meeting of the DGHM
Event Location:Würzburg, Germany
Event Type:international Conference
Event Dates:05-08-March 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:11 Jan 2018 13:41
Last Modified:31 Jul 2019 20:15

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