How worried should I being exposed to ringworm on ferals?

We've had two feral kittens outside.  One we tamed enough that we quarantined in the bathroom.  We weren't certain she had it.  But I decided to be cautious.  (Which turned out to be good.)

The other one that more obviously has ringworm I've never touched.  But she'll run up onto our shaded brick porch up by the door.  She'll also run right up to me.  She just doesn't want to be touched.  This makes me want to vacuum every time I come back in from outside.  I also need to get her TNR'd soon, too.  But I'm not sure if I should really take her to a clinic with her having ringworm. 

 Another older feral hangs out with her a lot and also comes up on the porch. 

I've heard that sunlight can kill spores if something is in the sunlight long enough.  But not the whole porch ever gets enough sunlight.

How worried should I be?  I know it should eventually pass with time from the young feral but it's giving me a lot of anxiety.

If you can't touch her, you may have to have it attended to by the vet.  She can be dipped, although I am not sure they will do that until her incision heals.  You may need to keep her confined until then, so you can get her back to the vet for dipping or other treatment.

You are right, as she gets older, she will probably fight it off herself.  Ask the vet what he or she thinks.  As long as you don't touch her and wash carefully after she brushes against you, you should be fine.  The ringworm fungus is all over the place.  Adult immune systems are usually strong enough to fight it off.

I have to go by the vet with the quarantined sister tomorrow so I'll ask what she thinks.  The outdoor more feral sister won't actually brush against me or anything.  She'll stop like a foot from me.  But I'm still concerned with tracking the spores into the house on the bottom of my shoes.

We track the spores into the house all the time, actually.  The big difference is that most healthy adults can ward of the fungus and most of our houses are clean enough.

The fungus usually blooms on kittens, whose immune systems aren't well developed yet, or on cats with compromised immune systems or who are ill.

I am not saying don't worry.  Take precautions and you should be OK.  If you happen to touch or get a little too close to the infected cat, wash your hands and clothes before touching your other pets.  I always left my shoes outside or covered my feet with booties before handling any infected cat.

I had a litter of foster kittens with ringworm once in a spare room.  That was rough, as they didn't develop it until after I'd handled them for a week or so.  My cats did not get it, though.  Part luck and part taking precautions once I saw the ringworm.  The vet dipped them all twice and they healed up well.