I noticed something in one of the logs to Dr. Cross in Chapter 6 of Dead Space. Here it is:
No doubt you're aware of the organic growth found in some parts of the ship. I've been examining the substance and thought the results would interest you.
The cells most clearly resemble bacteria, with viral behavior. Like bacteria, the organism infects other cells through osmosis, then mutates and reproduces agamogenetically.
What's amazing is the SPEED at which it grows. A single bacterium reproduces twenty-fold in just one minute. I've never seen anything like it. I won't stake my reputation on it, but I think this may be a genuine alien lifeform!
Prof. Hawley theorizes that it's a habitat transformer -- the levels of gaseous output are tremendous, which is why it smells so bad -- but to what end we simply don't know. I'll keep you posted.
This has caused me to want to research the Necromorph pathogen further, and possibly try to figure out what it is based on studies and reports in the games. If you have any logs (auido or text or video doesn't matter) that would help, PLEASE show them to me! Leave a link or name on my wall on here! When I post my findings and results I will quote those who helped me!