That snake has dark pupils, at least in the photo. Not an amel.
I would isolate in her own viv, preferably in a different room, for a minimum of three months, and I myself would go more like 6-12. UNLESS you take her to a vet and do testing.
Do any chores of hers- feeding, cleaning, etc. on a different day than the rest, or if you can't, then last. Do not share any of her things with anyone else. (Really, don't share anyone's things). Wash your hands _thoroughly_ after handling her or any of her stuff. Don't use the same scrubber to clean her water bowl as you use for the other snakes, or feeding tongs, or feeding container, or anything.