I am the husband of a lady aged (now) 78, who contracted ADEM in August of 2014.
It appears that the attack followed a gastro attack for which we attended our local hospital here in Adelaide, South Australia.. After being sent home with tablets after the initial attack, we attended again a week later when the gastro was more severe. After two days, my wife fell into a coma and was quickly transferred to another hospital with neurological facilities. Fortunately, the doctors there identified ADEM after a few days and began treatment straight away. As a consequence, she made quite a rapid recovery and was transferred back to the original hospital after two weeks for rehabilitation.
Now, nearly two years later, she is nearly back to normal although there are still some issues not completely resolved, She has food allergies which are slowly dissipating and a major problem with her balance which means she needs a cane to assist walking. There are also psychological after affects; more emotional, short term memory problems etc. But nothing more major than that .Now, she is driving again ,cooking and housekeeping as in former times, teaching German again and living a relatively normal life with no major problems.
Reading others' responses, we are grateful that she has escaped so comparatively lightly.
I hope this gives hope to other ADEM sufferers and their carers