The flea treatment is called Program (probably the same brand name in the USA?) Active ingredient is lufenuron.

We didn't learn about this research until about four weeks into our experience, which was the time we had just gained control of the situation (no new bald patches appearing daily), but the cats did appear to heal quickly once we started using Program.

Program doesn't kill existing fleas but causes flea babies to be born without spines, thus ending their life cycle. Apparently a side-effect of Program is that is doesn't kill existing ringworm fungus, but helps stop it reproducing.

You may have seen this web site in your searches - has a good article on the research undertaken.

http://www.ompetproducts.com/ringworm.html

This has brought back memories of our mornings, when we'd wake up and find at least one new bald spot a day where the day before there was beautiful fur. Jasmine lost all the fur on both ears and had huge patches on her legs and tail. Poor little thing looked like she'd been eaten by moths! And Mini's coat was white then, and he had big brown bald circles all over him which stayed when his fur grew back brown!

Good luck again!