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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Shellfish allergies are highly cross reactive, but its prevalence is much higher than that of fish allergy. Shellfish allergy is the leading cause of food allergy in U.S adults. [31] As of 2018 six allergens have been identified to prawn alone; along with crab, it is the major culprit of seafood anaphylaxis. [13]
To cause an allergic dermatitis reaction, the urushiol is first oxidized to create two double-bonded oxygens on the chemical. It then reacts with a protein nucleophile to trigger a reaction within the skin. Dermatitis is mediated by an acquired immune response. Urushiol is too small to directly activate an immune response.
Treating allergy symptoms with over-the-counter medication, saline spray, and, if warranted, allergy medication or injections from your doctor, may also help reduce GI symptoms as a result.
Symptoms of an allergic reaction to mold may include sneezing, a runny nose, or an itchy throat, according to Mayo Clinic. Ingesting large doses of certain mycotoxins can cause acute poisoning or ...
Food allergy symptoms occur within minutes to hours after exposure and may include: [11] Rash; Hives [11] Itching of mouth, lips, tongue, throat, eyes, skin, or other areas [11] Swelling of lips, tongue, eyelids, or the whole face [11] Difficulty swallowing [11] Runny or congested nose [11] Hoarse voice [11] Wheezing and/or shortness of breath [11]
For allergies, it can be applied to the skin with a carrier oil or used in a bath. Just keep in mind that tea tree oil is highly toxic to pets, either when ingested or inhaled. iStock
This mechanism causes allergies to typically give immediate reaction (a few minutes to a few hours) to foods. Food intolerances can be classified according to their mechanism. Intolerance can result from the absence of specific chemicals or enzymes needed to digest a food substance, as in hereditary fructose intolerance .