SecularFrummy: That makes sense. I also feel really dumb because in my whole megillah, right after I said that viruses and bacteria are different, I called MRSA a virus :(.
The whole thing with it being on a plasmid or the main chromosome never occurred to me- that makes so much sense.
What do restriction endonucleases have to do with it? Isn’t the whole point whether the gene pool is similar enough for two organisms to mate? Sorry, I’m just not getting it.