Is it true that cut onions absorb dirt and hence, should not be kept for long?

Some people say eating onions cut even an hour ago and left in the open can make you sick. Is this correct?Is it true that cut onions absorb dirt and hence, should not be kept for long?
Onions don't ';absorb dirt';. However, they have a relatively high sugar content, and so attract microbes at a higher rate than some other foods. Some of those microbes could make you ill if they have multiplied to sufficient quantity (unlikely in as short as an hour, but theoretically possible under the right mix of circumstances). The way to avoid this is to cover the cut surface of the leftover onion as soon as possible to keep the microbes out. Refrigeration also helps. The handling of onions is no different than any other safe-food-handling practice.Is it true that cut onions absorb dirt and hence, should not be kept for long?
If it was securely covered after being cut (put in a sandwich bag with almost no air trapped in it, covered with plastic wrap, etc.) and refrigerated, an onion is safe to eat *days* later. We do this all the time.
What?Absorb dirt....who have you been listening to....some bad advice.


But,yes after cutting,cover and place in frig.up to approx.5 days.
any cut fruit/vegetable left uncovered for a longer time should not b eaten
No its not true. Its best to store them, but it wont make you sick even the next day
not that i no of. ive never heard that before