Then I would really reconsider buying any more new snakes.
I mean this in the nicest way possible. It is impossible to know where that new snake came from. And if could carry a number of bad things. That is why there is a quarantine of new animals.
I've seen people lose everything because of a bad, or no quarantine process. And as much as we have not gotten along in the past, I would truly hate to see something bad happen to your collection.