I got her easily today after feeding her three times inside the cat carrier. So she is now locked in my spare bathroom with all the necessaries, and plenty of space and things to climb on, since I am using it as a store room until the kitchen gets finished. I will leave her to get familiar with the place and then start to get to know her slowly. There is no great hurry now that she is out of harm's way, but I will get her to the vet for a checkup next week. There are a corridor and two doors between her and the other cats, so that will not be a problem. And none of them have been in that bathroom for at least three months so I think she will be safe from ringworm as long as I observe hygiene rules.