Where humans travel, bacteria will follow. If people are in space for any amount of time, bacteria are sure to thrive there so it’s good to know that there are already researchers looking at how the environment within spaceships affects bacterial populations.
From the point of view of a micro-organism, the human body is a prime piece of real estate. For those bacteria and fungi that can avoid or fight off the immune systems, a human provides a whole range of moist, nutrient-filled little spaces in which to live.
Although bacteria are single celled organisms, they are capable of working together in massive bacterial colonies known as biofilms. Within the biofilm bacteria will differentiate to perform different tasks, all wrapped up within a sticky substance that holds the cells together.
Stress hormones break up bacterial biofilms, potentially dispersing plaque deposits into the bloodstream