I was going to ask the same question.. I saw what you were talking about.

As far as quarantine goes for me.

I quarantine in a different room away from my established healthy collection. I go 90 days, have a fecal done within a week or so depending on when I can get a sample ( I am talking geckos here though). Then if that fecal comes back positive for something, I extend the 90 days starting when treament is over and have had a negative fecal. Kind of like a medical/treatment quarantine, then a observatory quarantine when treatment is over. I have a small collection though and this seems to work well for me.