A science experiment showed that the salmonella bacteria which was isolated in the space fromthe crew members when returned back to earth and ingested to mice caused the mice to die faster than if ingested the bacteria present in the earth.
The experts concern are for future astronauts who will embark on longer space missions farther away from Earth-based medical help.
What happens to the bacteria?
The bacteria undergoes transformation or changes in its genes due to the changes in the motion of the fluid surrounding its cells.
In our intestine the current of this fluid decreases leading to the flourishment of the bacterial infections and the same mechanism occurs in the space.
Scientists are working on this to find a solution before allowing the astronauts step into the mars.
source:
http://news.nationalgeographic.com/news/2007/09/070924-space-bacteria.html
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