The toilets are not as clean as one might think

If you are aboard the International Space Station and you feel the call of nature, we suggest you determine how long you can keep it.

NASA scientists have discovered four strains of previously unknown bacteria that are resistant to antibiotics living in space toilets, reports Live Science. Another strain resistant to antibiotics was found on an exercise machine.

To inflate.

The good news: scientists say it's not something that will kill astronauts. The bad news: they kind of added an "encore" to this warning.

"It is important to understand that strains found on the ISS were not virulent, which means that they do not pose an active threat to human health, but [still] to watch, "said Nitin Singh, lead author of the study and a member of the JPL's Biotech and Global Protection Group.

Even better? The authors of the study stated that there was a 79% chance that the bacteria would become a bacterium that could cause diseases in humans during future missions.

They will know more after studying in a body living in space – presumably a lab rat or other creature, rather than an astronaut who pulls a short straw, which is a bit the way we imagine the process was used to determine who had to scrub the toilet space in the first place.