They aren't contagious in the sense that she would get one having touched he child as yeast infections are actually a LACK of bacteria where they are needed. but, if you touch your eyes or something afterwards you could end up with an eye infection.
I don't use gloves, or hand-sanitizer (is it it so drying, the cracking around the nails is like ASKING to be infected). I just wash well with soap after I'm done.