CORN CHIPS???

*deep breath in. exhale. good*
Okay, I'm better now.

Allright. First of all think of yeast as a plant that needs two things to grow: moisture and sugar. If you make bread, one of the steps is to place the yeast in some warm water with sugar and let it sit for a few minutes. This "sprouts" the spores and jump starts their growth.
Yeast doesn't only feed off of processed sugar, but it also feeds off of natural sugars. This means that honey, fruits, vegetables and grains which are high in carbohydrates will aggravate a yeast overgrowth. How? By affecting your blood sugar level. This is known as a high glycemic index.
Foods that further complicate an overgrowth of yeast are:
breads and grains (rice), white and/or yellow and/or red vegetables, fruits, processed foods (especially those with natural sugars, corn syrup, etc.) , cheeses, non-fermented milk products (the lactose in the milk)
{Corn chips are processed yellow vegetable grain products}
This leaves you with green vegetables, fermented milk products, meats and whatever else doesn't fall into the above category
Of course, once the yeast is under control, you can gradually start to add items back in like blueberries and strawberries, whole grain sprouted breads, brown rice, organic vegetables, etc. Products which are organic are more easily processed by your body. Products with more fiber (like brown rice vs white rice) have a lower glycemic index.
I hope your family is doing better soon. I'm sorry for gasping
