I've been trying to find some research on this subject but haven't been lucky finding any in the usual places. I remember back some time ago when I had a minor foot infection, the Dr. prescribed an otc anti-fungal cream which turned out didn't really work so I decided to eliminate all soda from my diet and just that change alone cleared it all up. Apparently there's been studies saying that 75g of simple sugar will half the efficacy of white blood cells and will still have noticeable effects 6 hours after consumption.

Oral bacteria will convert sugar into a high acid substance - hence caries. Intestinal bacteria also eats up sugar and spit out high amounts of uric acid - hence gout. Is high acidity causing high bacterial growth to the point where white blood cells can't handle them - or all the cells simply exhausted themselves?

Instead of "spitting out", I meant to say that the bacteria produce uric acid as a byproduct of consuming sugar. Because the body is already flooded with insulin, the actual excretion of uric acid from the body is diminished - and it (uric acid) will accumulate into areas like joints and crystallize there - causing problems. Source here: http://news.bbc.co.uk/2/hi/health/7219473.stm

Also "caries" = technical term for "cavities", as in - your teeth.