Please describe the underlying causes of thrush/yeast infections?

Yeast/opportunity. Thrush /yeast infections are caused by a yeast called candida albicans. It is an opportunist that is everywhere in nature and makes up 5% or more of the dry weight of your poo.It lives off the sugar in mucous and needs only the opportunity to get into a space to set up shop.Having the anus near the vagina makes it an common site.Diabetics and babies that feed often are more at risk of oral thrush.