i had been working in a local hospital for 18 yrs. i showed sx's and people knew i had been dx'd with MS. it became more difficult for me to work and i had to resign my position.

BUT, i know in hindsight that i was targeted and documentation was being written up about my work. they were trying to get me out.

i wouldn't recommend disclosing. especially when you're trying to get hired.
and especially if you're not showing overt sx's. IF you have problems after you're hired you have time to evaluate IF you should tell. and, it's against the law to discriminate. but, that won't stop and employer. they know how to get around it.

my feeling is that once you tell anything you can't take it back. so think carefully.