A final lesson to be learned from this case is that perianal eruptions may be due to materials deliberately applied to the anogenital region or to ingested antigens that remain sufficiently intact within the feces to affect perianal skin. However, the risk of cashew nut dermatitis today remains small, and this should not discourage cashew lovers from enjoying their treats. Cashews are not poisonous, but they can cause an allergic reaction in some people. They are both in the family Anacardiaceae. Cashews are a type of nut that is related to poison ivy. The fact that our patient was ill enough to require treatment with 3 weeks of systemic steroid therapy highlights the potential public health hazard of consumption of improperly prepared cashew products. Octoby Normandi Valdez Poison ivy is a common plant in North America that can cause a rash if you come in contact with it. Moreover, though hinted at in the literature, there has been no previous detailed report of perianal contact dermatitis due to cashew ingestion. We have found no other report of contact dermatitis due to cashew nut butter. Despite avoidance to culprit foods, hidden allergens can be a source of food allergy reactions. Food allergy is estimated to affect 6-8 of children in the United states and it is associated with a risk of anaphylaxis. With the precautions taken today to avoid contamination of food products with cashew urushiols, it is rare to find a case of cashew nut dermatitis in the United States. Pectin allergy is not very common, but it can be a source of allergy for patients sensitive to cashew and pistachio. We have reported a case of cashew nut urushiol dermatitis due to ingestion of homemade cashew nut butter contaminated by cashew nut shell oil. There have been cases of rashes developing in reaction to contact with lacquerware because the oil remains in the paint.The urushiol dermatitis caused by plants of the Anacardiaceae family is the most common cause of acute allergic contact dermatitis. This tree produces the sap used in painting those beautiful lacquered boxes. Around 20 percent of the unlucky cashew-eaters developed a rash.Īlso in the family is Toxicodendron vernicifluum, or the Japanese lacquer tree. The Center for Disease Control published a report in 1982 about a batch of >7500 bags of shell-contaminated cashews being sold in Pennsylvania and Maryland, mostly as part of a Little League fundraiser. The oil is found on the outer shell (similar to mangos, where it’s found on the skin) and roasting the cashews at high temperatures can kill any remaining oil that makes its way through to the nut. Urushiol is the reason cashews are never sold in the shell and are typically roasted. The oil is found in all parts of the plant, including the leaves, stems, and even the roots. They all contain urushiol, the sneaky oil that causes the skin to erupt in rashes for some people and is the bane of my existence, but to varying degrees. The anacardiaceae family of trees, sometimes called the cashew family, includes mango, poison ivy, poison oak, sumac, Peruvian pepper, pistachio, and you guessed it, cashews. Symptoms of a cashew allergy include: abdominal pain. What is the difference between poison ivy, poison sumac, and poison oak? In rare situations, the symptoms start hours after exposure. Mango, it turns out, is also a member of the anacardiaceae family. You see, my friend had cooked for me a popular meal from her homeland of Trinidad, which was full of delicious, fresh mango. So, how was that possible? It was then that I learned-the hard way-that poison ivy is just one member of a family of trees, the anacardiaceae family, that can carry an oily irritant that causes a rash. The most common food allergies include milk, eggs, peanuts, tree nuts, shellfish. I think I saw one tree the entire time, and it certainly wasn’t hosting a nefarious vine. The body then makes antibodies to that food and an allergic reaction occurs. In one instance, however, I broke out in a poison ivy-type rash after visiting a friend in downtown Los Angeles and my dog was nowhere in sight. Even for a mild allergy, there may be itching or tingling in or around the mouth. Dogs do not react to the plant’s oils, so she carries on none the wiser but brings the oils to me. Two of the most common symptoms of a cashew allergy are hives and swelling. I wish! Unfortunately, for me, it’s usually my dog that frolicks in the plant. Well, stop rolling around in poison ivy, you might be thinking. It’s itchy, uncomfortable, and I’ve spent many sleepless weeks on steroids trying to keep the rash at bay. When I encounter poison ivy or poison oak, even in the tiniest amount, my body’s immune system explodes in a systemic reaction, creating a situation that requires fast treatment. Avid listeners of this podcast may recall my past revelations that I have a super power.
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