I may not be the brightest bulb in my family's marquee, but if you, lisajl, truly work in a vet's office, it would be the last place I'd take by critter. Are you kidding about that? I'm serious, do you really work in a veterinarian's office?
Poison it? Shoot at it with a BB gun? Don't know about other animal lovers, but I've always found my vet and his assistants to be better with their patients than my human doctors are with me.
With that kind of attitude about animals, why do you work around them?
phorsenuf, getting back to your original question, I, too, domesticated a feral feline. It took several weeks of laying food out and gradually getting closer to her until I was able to snatch her up and take her inside. Took her to the vet the next day for tests, and she tested okay. She didn't want to have anything to do with me. She warmed up eventually. Had another "queen" in the house at the time, so for 5 years (that's right, FFFIIIIVVVEEE years), I had to put the new girl in a separate room during the day while I was away so they wouldn't kill each other. They seemed to keep a truce when I was in the room. The first queen died (had to be put down at 21 years old), so now the interloper is my only kitty. I look at her sometimes and can't believe she was so afraid. She's still a "scaredy cat" around strangers, but she's fine with people she knows (and who feed her.)
By the way, she'll be celebrating her 15th birthday some time within the next month or so.
Peace out, lisajl. Hugs and kisses!!!!