The large intestine is either slightly acidic or neutral in it's balanced state, but of course in the overly acidic body, it is much to acidic, and at least for me, this is where I feel the majority of my candida problem.
If your large intestine was too acidic, this would be LESS hospitable to fungal candida, not conducive too it. The acid-loving bacteria in the colon keep the pH down. When they are killed off the pH starts to rise and more and more candida yeast start to turn fungal.
What governs the pH at various places in your GI tract is different from what governs the pH of your flesh and various bodily fluids.
Technically, scientists consider the gut lumen to be outside the body.