I have 2 male cats approx 2 years old. I decided to get a new cat, a younger girl, 5 mths old. The cat had ringworm. Mild case, around ears and on belly. I got miconazole antifungal shampoo, washing her every 5 days. I also have oral meds fluconazole, taken once a day. I am also putting on a cream twice a day clotrimazole. I am hoping this is enough. I know I should I isolate her. I used to keep her in the bathroom, but I felt so bad, she was crying all day because she did not want to be alone. So, I gave in and let her out to play with the boys. I watch them very carefully to make sure they don't touch. I have covered my couch with sheets and plan to wash it after she has laid on it. I am trying to be very careful but I'm wondering if I need to treat the boys. They are adults and I read that adult cats are relatively immune to ringworm. The girl is still a kitten, under 1 year and so her immune system is not quite developed and thats probably why she got ringworm. I would really hate to have to medicate the two boys if I don't have to. Has anyone had experience? How contagious is ringworm? I got this cat from a foster. The foster had 7 cats, and 4 of the 7 got ringworm...but, do you think its hopeful that not ALL of them got it. I mean, if I am very careful, can I stave off the fungus? Oh, and I only let them play from the time I get home from work until bed time. I don't let them sleep together, and I still keep them separate when I'm at work. They are only together...at most, 6 hours a day.