My husband has Generalised Anxiety Disorder and a sort of side-bar of health anxiety. He is medicated but it isn't always enough. He tuts nad it drives me CRAZY, I'd like to whack him over the head with a rolling pin - an unwashed one! He gets nuts if I use raw meat in the kitchen, the hand washing used to make his hands raw before I introduced him to hand sanitiser. He gives me little rules like "that knife only for butter" or never any meat cooked in this tin. I nod and smile and ignore him 'cos he's nuts. We've never had food poisoning, I am careful with my hygene but am not pandering to crazy. I occasionally am forced to offer him the option of preparing all his own food on his own utensils and crockery - oddly that normally makes him rein it in a bit for a while! Sometimes I just yell at him to stop driving me mad and he will take his tutting elsewhere.
We can't eat (EVER) in any Pizza Express, Nandos, KFC, Subway, Any Chinese / Thai restaurant (the meat apparently is most likely to be Alsatian) or anywhere with a hygene rating less than 5*. Apparently at some point he's heard bad things about the hygene in those chain fast food joints so we can't eat there (although McDonalds, Dominos, Bella Pasta and Pizza Hut are fine). If I am on my own I eat wherever I feel like (the dirtier the chinese the better!), if he is with us it is easier to avoid. He genuinely won't eat and would look petrified the whole time (hand ringing, the sweats, fast breathing) that I was poisoning daughter.
He has IBS (or similar) but won't get diagnosed or treated because HE thinks it is food poisoning or allergies. He thinks he is allergic to nuts (he isn't, I feed them to him he just doesn't know), cheese (high fat food does set off his tummy but a tiny bit of cheddar won't kill him - I test it regularly), peppers (ok - yes I tested this and they do give him dicky tummy), lamb (no he definitely isn't!)
He also won't eat meat that looks like meat or is meaty (southern fried chicken escalope would be ok but god forbid I put a chicken leg in front of him). A rack of ribs would be unimaginably horrific. I'd be happy to feed him veggie but he doesn't like most vegetables! He doesn't think they'll poison him he just won't try them.
He knows I think he is nuts, he mostly agrees with me but can't help himself. I try not to let him see when I am ignoring his latest dictate on the assumption that what he doesn't know doesn't hurt him.
His mum is also nuts in much the same way so I can see where he gets it from, I just hope my influence will help prevent my daughter suffering the same - it often looks like death by a thousand cuts being my husband.
I'd send your hubby to the GP to see what the underlying issue is if he can't control his tutting.