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IIT-Madras, NASA study microbial interactions in ISS

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Chennai: The Indian Institute of Technology Madras (IIT-M) and NASA Jet Propulsion Laboratory researchers have studied the interactions between microbes in the International Space Station (ISS) that will help devise strategies for the disinfection of space stations to
minimise any potential impact of microbes on the health of astronauts.

Crews, during spaceflight, may have altered immunity and limited access to terrestrial medical facilities. Therefore, studying the microbes inhabiting the space station becomes important to understand the risks associated with short-term and long-term space travel on the health of astronauts, the IIT-M researchers said today.

The present study was motivated by the earlier observations of the dominance of Klebsiella pneumoniae on the surfaces of the ISS. This pathogen has been known to cause pneumonia and other nosocomial infections.

It said the researchers were broadly interested in understanding how this bacteria affects the growth of other microbes in the vicinity and the possible implications it could have.

The researchers analysed the microbial sample data taken across three space flights at seven locations on the ISS. The study found that Klebsiella pneumoniae, a major microbe that resides on the ISS, is beneficial to various other microbes also present on the ISS, especially the bacteria from the Pantoea genus.

However, it was found that its presence was hampering the growth of Aspergillus fungus. This computational observation was further tested through laboratory experiments and it was found that the presence of K.pneumoniae was indeed detrimental to the growth of the Aspergillus fungus.

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