[Radix]

You've been busy lately Sir. Thank you.

Why are these micro organisms so familiar? Gram positive, negative? Acid fast?

If I remember my "Bergys" correctly, there are so many thousands of types that some writer saying anything about 'familiarity' is rather silly.

We don't even know all of the bugs living today, never mind what was dominant 100 million years ago.

[Jack Hammer]

"Why are these micro organisms so familiar?"

Great numbers of ancient germs and other poxy bugs and organisms have existed for decades in the United States Congress, not to mention the local legislatures of many of the fifty states.