Another clue ebnelson relevant to sunblok posts...Fungi in Space...They like to eat up plastics...Mutant strains of these type organisms have already made there way back to earth...inside more.
Fungiand molds need hydrocarbon substrates. Percursor sterols from plants,animals and humans will do fine ( pathogenic )...Fungal species are found in oils, aviation fuel...growing on the inside walls of potable water system PVC pipes just to identify a few.
http://liftoff.msfc.nasa.gov/news/2001/news-stationmicrobes.asp
http://216.239.35.101/search?hl=en&q=fungi+in+space
regards,
