I believe it is possible to die from ANY infection that is untreated. It will go septic and the person could go into a coma and due to septic shock may lose previous mental and pysical capacity. Infections are generally an easy fix with antibiotics. The sooner the better because there are different stregnths of antibiotics. People who wait and have to use what are known as the 'big guns' may not be able to benefit from antibiotics later because your body builds a resistence. Sorry, my wife is a nurse and my family has been prone to infection. But this is it in a nutshell.
no im not 100% sure but from what i have read it won't kill you but could damage your reproductive organs