First 50 mile race this Saturday, July 6th, sick due to food poisoning

I have Leadville 50 mile race this Saturday and I am recovering from food poison since Tuesday and still feeling weak as on Wednesday evening. I have been following up good training since last 3 months. I had couple of 50K and marathons in last few years, no race last year ,though but did Leadville full and half marathon in year 2015 and 2016. Since this is my first 50 mile race and I am bit concerned with my health situation on race week :(. Please share if you had situation like this or have any suggestions.

Thanks,
-Jay