Microbiomes of the dust particles collected from the International Space Station and Spacecraft assembly facilities

This research aimed to understand what kinds of microbes live in the International Space Station (ISS) environment, where astronauts spend long periods living together. Scientists wanted to know if these space-based environments could be similar to Earth's cleanrooms used for sensitive tasks like making medicines or building electronics-places on our planet that also need very few germs around them. To find out what microbes were present, the researchers took samples from different areas of the ISS and looked at their DNA using a special technique called pyrosequencing. They found various types of bacteria but no archaea (another group of tiny organisms). Interestingly enough, they also compared these results with similar studies done on Earth cleanrooms to see if there are any differences or surprising connections between the two environments.

This research paper presents an in-depth analysis aimed at characterizing the viable microbiome within the International Space Station (ISS) environment. Recognizing that understanding these communities is crucial to ensuring crew safety and maintaining equipment, this study sought not only to identify present bacterial species but also to compare ISS environments with those of Earth-based cleanrooms associated with space exploration activities as a model for the former's microbial ecology. Methodologically, researchers employed pyrosequencing and Illumina sequencing techniques targeting specific 16S rRNA gene regions to amplify bacterial DNA fragments from ISS samples collected during various missions (e.g., STS-95/STS-123). The study utilized primers designed for both Bacteria and Archaea, allowing a comprehensive overview of the microbial diversity present in these unique environments.