I'm looking for journal entries, ect on what causes the dementia like symptoms in elderly patients when suffering from a urinary tract infection. I am on the understanding that the true reasons are unknown at this time, but I would like to read more on what research has already been done on this phenomenon.

It's called an "acute confusional state" and it resolves after the infection is gone. It's not dementia, which is a permanent condition. It usually is due to a combination of high fever and dehydration.
Google it.