Kudos to you for reading the leaflet. It's your body and it's your kid --- you can't be too cautious.
A yeast infection is a sign of an internal imbalance. You can't win by fighting it externally. Candida (yeast) is everywhere and everyone has it in them. It's just a matter of balance. If your gut has a lot of friendly bacteria, the candida (yeast) cannnot grow out of control. If you ever had antibiotics, that wipes out the good and bad bacteria... and it allows the candida (yeast) to proliferate. Once the yeast are out of control, the only way to effectively deal with them is through diet.
The best yeast diet is the Body Ecology Diet. It's key feature is eating tons of probiotic rich foods like kefir and cultured veggies.
There is a huge link between yeast infections and autism. When you have an imbalance of gut flora, then your kid will have an imbalance. This will cause a myriad of issues - colicky, food issues, eczema, asthma, allergies, ADD, ADHD, autism, etc, etc.
More information here:
http://www.corganic.com/autism.html
http://www.corganic.com/videosubgatesmcbride.html
FYI - Another thread on Yeast Infections:
http://www.mamasource.com/request/10929584461712523265