Bacterial Monitoring with Adhesive Sheet in the International Space Station-"Kibo", the Japanese Experiment Module
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概要
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Microbiological monitoring is important to assure microbiological safety, especially in long-duration space habitation. We have been continuously monitoring the abundance and diversity of bacteria in the International Space Station (ISS)-"Kibo" module to accumulate knowledge on microbes in the ISS. In this study, we used a new sampling device, a microbe-collecting adhesive sheet developed in our laboratory. This adhesive sheet has high operability, needs no water for sampling, and is easy to transport and store. We first validated the adhesive sheet as a sampling device to be used in a space habitat with regard to the stability of the bacterial number on the sheet during prolonged storage of up to 12 months. Bacterial abundance on the surfaces in Kibo was then determined and was lower than on the surfaces in our laboratory (105 cells [cm2]-1), except for the return air grill, and the bacteria detected in Kibo were human skin microflora. From these aspects of microbial abundance and their phylogenetic affiliation, we concluded that Kibo has been microbiologically well maintained; however, microbial abundance may increase with the prolonged stay of astronauts. To ensure crew safety and understand bacterial dynamics in space habitation environments, continuous bacterial monitoring in Kibo is required.
著者
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Nasu Masao
Graduate School Of Pharmaceutical Sciences Osaka University
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Yamaguchi Nobuyasu
Graduate School Of Pharmaceutical Sciences Osaka University
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Ichijo Tomoaki
Graduate School Of Pharmaceutical Sciences Osaka University
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Hieda Hatsuki
Graduate School of Pharmaceutical Sciences, Osaka University
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Ishihara Rie
School of Pharmaceutical Sciences, Osaka University
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