Comtaxan parasite
The Comtaxan parasite was a parasite found in the mirror universe on the planet Tonnata VII.

In the mid-2250s, Captain Maddox injected Barlow with the DNA of the Comtaxan parasite, which was known to not "mix well" with Human DNA. The injection caused Barlow's body to lose cohesion and explode. ()
Microorganisms