Yes, as long as the temperature in the room is under 40°F, 4°C. After brought to a temperature just slightly above the temperature of melting ice for more than 20 minutes, the bacteria found naturally in oysters (and there is a TON of them) will begin multiplying rapidly. These bacteria are quite poisonous to all animals, and can cause symptoms ranging from gastro-intestinal discomfort, to vomiting, and if left untreated, possibly death. A byproduct of this bacterial action is the creation of ammonia, which can be easily smelled with a quick whiff. If you smell ammonia in ANY raw seafood, DO NOT EAT!
No. Seafood should not be eaten if it was left out overnight.
That would not be a good idea to eat soup left on the counter all night, unless the counter was as cold as a refrigerator. Throw it away. Of course you can...but it would probably kill you.
no
It might not be noticeably spoiled, but it would not be safe to eat.
No. Shrimp that has been left out overnight is not OK to eat.
No, it is not safe to eat if it has been left out overnight.
no
It wouldn't be safe to eat salad that's been left out overnight.
No, your paintballing smoke grenade will not work if left outside overnight in the rain.
yes and no!! ;)
No. They should be discarded.
its not
YES. When keeping it, just be sure that it is not contaminated by any substances to avoid food poisoning.
There's no way to tell without knowing how long it has been sitting unrefrigerated.