Drug-Resistant Bacteria Discovered on International Space Station

Researchers have discovered 13 strains of a drug-resistant bacteria called Enterobacter bugandensis on the International Space Station (ISS). The bacteria, which are associated with the human digestive system and have been linked to clinical infections like neonatal sepsis, were found to be more resistant to drugs and capable of persisting in the unique space environment characterized by microgravity, radiation, and elevated carbon dioxide levels.

The mutated strains of E. bugandensis were isolated from various locations on the ISS, including the bathroom, air conditioning system, and an exercise device. These bacteria have become genetically and functionally distinct from their terrestrial counterparts, exhibiting a higher tolerance to antibacterial treatments and the ability to coexist with other microorganisms like gram-positive bacteria such as Staphylococcus saprophyticus.

While it remains unclear if the bacteria had a negative impact on the health of the astronauts, preventative measures were taken to mitigate potential risks. The discovery raises concerns about the origin of these drug-resistant strains and their potential consequences, especially as governments and private firms plan to replace the ISS with multiple stations catering to science, manufacturing, and tourism.

Why this matters: The emergence of drug-resistant bacteria in space has implications for the health and safety of astronauts on long-term missions. It also highlights the need for enhanced monitoring and preventative measures to address the potential spread of these mutated microorganisms to Earth.

NASA and other space agencies are studying the ISS microbiome to understand how these microbes evolve and affect future space exploration. While the health risks to astronauts and humans on Earth are still unclear, researchers call for proactive measures to mitigate the impacts of these mutated bacterial species.

Key Takeaways

• Researchers found 13 drug-resistant Enterobacter bugandensis strains on the ISS.
• The mutated bacteria exhibit higher antibiotic resistance and ability to persist in space.
• The bacteria were isolated from various ISS locations, including the bathroom and exercise areas.
• The discovery raises concerns about the origin and potential consequences of these microbes.
• Proactive measures are needed to mitigate the risks of these mutated bacteria in space.