Ringworm fact vs fiction

Hello! I work for a cat shelter as an animal care officer. My background is more in law enforcement than in animal medicine, but I love animals and agreed to take in some foster cats recently (19 kittens, actually) and they recovered from their uri's, only to show signs of ringworm. I agreed to take the vets challenge of "4 more weeks" to treat the ringworm, mad split the group into a room with 9 and a room with 10 based of severity. I was given the lime sulphur dip and instructed to clean like I have never cleaned before. 4 weeks later the group of 10 with the "milder" symptoms seem to be coming up clean (test hasn't turned red, but a few days left). Anyway, I self educated on irradiation and the internet has horrific tales of this stuff living in my house for ions. The group of 9's test are already red and I have continued to treat all 19 in case this stuff really is blowing around like a fart in a windstorm. So today I dipped everyone and continued to exhaust all of my free time cleaning/bleaching. Both rooms of "kitten storage" are essentially void of furnishings and neither have carpet. The kittens with the already positive culture are in a room with a separate hvac system ( a wall unit), and the seemingly now negative kitties are in a room that is on the house system ( an evaporative cooler). The other difference is that the ones already coming up positive had more severe uri's to start with. I really want to get them well ASAP so that they are still little and more easily adoptable and so I can move along to alternate ways of spending what's left of my summer that does not involve this much crazy (it's a dang river of cats when I open either room's door). My kid and I have not gotten ringworm (but I think we are immune cuz my ex had a bad case on his torso the entire time we were married and my kid used to lay on it when she was a wee lass.....he thought it was a side effect of his valley fever for years, but it was ringworm and we never caught it) and my own 4 cats and dog show no signs as of yet. What I am wondering is 1. Do I need to dismantle the wall ac unit for a cleaning beyond spraying with 10:1 bleach in the room with the still positive kitties? And 2. Is all this cleaning and bleaching the WHOLE house necessary? I mean, can these spores "float" their way into boxes of stored ornaments in the closet? What is the REAL truth to this stuff?

Since you work for a shelter, I am sending you this extremely detailed link from sheltermedicine.com which tells you more than you ever wanted to know about ringworm:  Print it and save it as info for others.

http://www.sheltermedicine.com/node/56

We also have lots of good info on this site, my favorite thread on this subject being

http://www.thecatsite.com/t/210789/6-things-i-learned-from-our-ringworm-plague-book-length

Lastly, I'm adding that we've had some recent success with a combination shampoo that includes ketoconazole and Chlorhexadine together.  This has worked for one person who had been unsuccessful using the lime sulfur dips alone.