The Satan Bug

A germ that could destroy life on Earth is stolen from a biological warfare lab and the thief threatens to release it into the open, prompting a security officer to act.
A US government germ warfare lab has had an accident. The first theory is that one of the germs has been released and killed several scientists. The big fear is that a more virulent strain, named The Satan Bug because all life can be killed off by it should it escape, may have been stolen.