Consequences of Eating Old Mushrooms. Sometimes, eating old mushrooms can only give you upset stomach where you will feel cramps and may or may not vomit. However, in some cases health effects of old mushrooms are far more serious. This is a rare condition that is caused by bacteria called Clostridium botulinum.
Also to know is, can you cook mushrooms if they are slimy?
As with any perishable food, consuming mushrooms that have passed their expiration date is dangerous and can make you very sick. Fresh mushrooms are tasty and nutrient-rich when they are firm and dry. Sliminess is one indicator that a mushroom has gone bad -- and that you should avoid cooking with it.
Can you get food poisoning from old mushrooms?
Mushrooms and food poisoning. Eating mushrooms that have been contaminated with harmful bacteria can make you sick. While fresh mushrooms do not naturally contain bacteria that can make you ill, they can become contaminated if they are grown on compost that has not been properly sterilized.
How do you know when your mushrooms have gone bad?
You can usually tell by feeling if your mushrooms have gone bad as they develop a sticky/slimy surface and get darker in color. Once this starts, it quickly destroys them. Once you begin to feel a slime on the mushroom, cook them quickly to extend their shelf life for a few more days.