Poison Ivy. Photo Â© CDC. Poison ivy, or rhus dermatitis, is caused by exposure to a chemical found in certain plants including poison ivy, oak, and sumac. This well-known rash starts out with blisters and redness on areas of the skin exposed to the plants. The rash spreads to other areas of the skin that come in contact with fluid from the blisters. Poison ivy and other forms of irritant contact dermatitis are treated with topical steroids. More Â».
Eggs can remain edible for even longer than a month, but freshness (egg yolk that sits firm and high, and a thick viscous egg white) will be noticeably less after two weeks. If eggs start out as Grade AA, they remain AA for only two weeks if properly refrigerated. After that, they'll be Grade A for another 2 weeks.
To keep hard-boiled eggs fresh, follow these food safety tips: 1  Do not keep boiled eggs unrefrigerated for more than two hours. 2  Do not keep eggs for more than a week. 3  If you detect an unpleasant odor from an egg, whether it's raw or cooked, throw it out.