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Detecting bacteria in space
by Staff Writers
Montreal, Canada (SPX) May 23, 2019

Detected bacteria and their origin (human gastrointestinal tract, flowers, water and laboratory mice) specific to each location.

Scientists at Universite de Montreal and McGill University have pioneered and tested a new genomic methodology which reveals a complex bacterial ecosystem at work on the International Space Station.

Until now, relatively little was known about the different types of microbes found on the space station. The new approach enables researchers to identify and map different species inside the ISS, which will ultimately help safeguard astronauts' health and be key to future long-term space travel.

It will also have applications in the realms of environmental management and health care.

"The new methodology provides us spectacular snapshots of the bacterial world in space and the possibilities of applying this method to explore new microbiome environments are really exciting," said Nicholas Brereton, a researcher at UdeM's Institut de recherche en biologie vegetale.

The challenge of maintaining cleanliness within space environments was first documented on the Russian MIR space station, where conditions eventually deteriorated so much that mould became widespread. On the ISS, space agencies have been trying to reduce the amount of microbial growth in the station since it was first launched in 1998.

Strict cleaning and decontamination protocols are now in place to maintain a healthy ISS environment; in orbit, crew members regularly clean and vacuum the space station's living and working quarters. But as resupply missions arrive carrying a range of material including food, lab equipment, live plants and animals, new bacteria species are continually being added.

Combined with existing human bacteria, and also because no windows can be opened, the build-up of bacteria inside the cramped quarters can be significant.

"Scientists have a well-documented understanding of broad bacterial families on the ISS, but now we've discovered a more diverse bacterial ecosystem that we ever expected," said Emmanuel Gonzalez, a metagenomic specialist at McGill. "It's an exciting step forward in understanding the biosphere that will accompany humans into extra-terrestrial habitats."

Although the microbial characterization method was piloted in space, its applications will be far broader, say the scientists behind the technology. Researchers can replicate this approach to address many challenges and environments, including in oceans and soils It is already being applied to human diseases and microbiomes.

"ANCHOR: a 16S rRNA gene amplicon pipeline for microbial analysis of multiple environmental samples," by Nicholas Brereton, Emmanuel Gonzales and Frederic Pitre, was published May 22, 2019 in Environmental Microbiology. The study was conducted by meta-genomics and bioinformatics scientists at Universite de Montreal's Institut de recherche en biologie vegetale at the Montreal Botanical Garden (part of Space for Life), and at the Canadian Centre for Computational Genomics, McGill University and the Genome Quebec Innovation Centre.


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NASA Team Teaches Algorithms to Identify Life
Greenbelt MD (SPX) May 20, 2019
If you've seen dental plaque or pond scum, you've met a biofilm. Among the oldest forms of life on Earth, these ubiquitous, slimy buildups of bacteria grow on nearly everything exposed to moisture and leave behind common tell-tale textures and structures identifying them as living or once-living organisms. Without training and sophisticated microscopes, however, these biofilms can be difficult to identify and easily confused with textures produced by non-biological and geological processes. ... read more

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