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I had purchased eggs at the supermarket and i forgot them in the trunk of my car for for 3 days are they still okay to eat?

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They are probably OK as long as they didn't get too hot, but you should test them before eating. Here's how:

Fill a bowl with cold water and place an egg inside.
If it sinks to the bottom, it's good.
If it sinks but stands on its point, it's good, but won't be good for much longer and should be used soon.
If it floats, toss it.

As far as refrigerating eggs in the U.S. vs. European room temperature storage:

"In some European countries, egg-laying hens are vaccinated against salmonella. In the U.S., vaccination is not required, but eggs must be washed and refrigerated from farm to store, and producers must follow a host of other safety measures."

Why The U.S. Chills Its Eggs And Most Of The World Doesn't — September 11, 2014, Rae Ellen Bichell, NPR Eating And Health

Also, commercially produced American eggs are washed with soap and hot, steamy water after collecting which removes a thin protective layer from the shell, which can effect shelf life at room temp. As long as you use the water bowl test, you're good to go.

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    I always thought the float test was just for determining age of the eggs. If that's the case, then this won't help. – senschen Jun 5 '17 at 11:46
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    Density test will unlikely reflect the main risks from pathogens. – user110084 Jun 5 '17 at 12:06
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In Europe, eggs are always stored out of the fridge and last there for weeks, so I'd say yes they are safe.

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    There is a potentially significant difference between a kitchen counter top and the trunk of a car. For example, particularly in the summertime, a car trunk can get exceedingly hot. Are you sure you have enough information to answer this question confidently? – moscafj Jun 17 '17 at 12:53
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    European eggs are not washed to remove their natural protective film and sold at room temperature. If your eggs have been washed and refrigerated, they should be kept in the fridge. – Jędrek Kostecki Jun 30 '17 at 16:07
  • Read below for a better international answer and why European habits don't carry over to the US. – lly Jun 21 '18 at 15:17
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As long as the temperature there was not above, say, 21 degrees Celsius. Eggs can be stored at room temperature, though I still like to put mine in the refrigerator.

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Would you risk getting sick for ~ $4. It's not like you left a tin of Beluga caviar in the trunk for 3 days. Toss them!

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Test eggs by submerging them in water. If they float, they are bad and filled with gasses. If they remain on bottom, they're fine. Dry and refrigerate.

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    The density test only tells you how much water has been lost through the shell, which gives you an idea of the age. It doesn't tell you anything about pathogens. – mrog Aug 9 '17 at 22:28
  • @mrog Well, these guys and these say, if anything, the egg can still be good even after failing the float test and to just go by smell. Did you have odorless early-onset pathogens people should worry about? – lly Jun 21 '18 at 15:15
  • @lly "Foods contaminated with pathogenic microorganisms usually do not look bad, taste bad, or smell bad." Source: food.unl.edu/food-poisoning-foodborne-illness If an egg smells bad, don't eat it. If it smells okay, but it's been stored in questionable conditions, don't eat it. You can smell the result of decomposition, but you can't smell things like salmonella, which love to grow in warm conditions. – mrog Jun 21 '18 at 22:34

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