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Oral allergy syndrome (OAS) is a well-recognized but little identified condition. It is characterized by a burning sensation or mouth discomfort and swelling when you eat precise foods that cross react to pollens to which you are allergic. Interestingly, the certain foods causing this reaction are effectively established to cross react with certain trees, grass, or weed pollens, house dust mite or latex. There are typical groups of foods that cluster with particular nasal allergies. For example, ragweed allergy generally causes an oral or gut reaction just after eating melons or bananas but often not other foods. Birch tree pollen is commonly associated with reactions to several foods as is latex allergy. The explanation for these reactions contain similarities in protein structures as nicely as some chemicals in the foods.
Although this reaction is properly documented in the allergy literature it is not commonly recognized or diagnosed by most doctors including some allergy specialists and various stomach specialists. Many different allergy web internet sites contain lists of the common foods connected with particular pollens, dust mite or latex. Nonetheless, a comprehensive list that is painless to read or interpret can be hard to get. Also, the names of some pollens or the frequent links in between a group of pollens and a group of foods can be confusing.
In its classic form OAS ought to be simple and easy to recognize. Following consuming a food linked with a pollen to which you are allergic you expertise close to immediate burning sensation in your mouth or throat with or with out swelling. Then again, it is generally recognized that regularly in medicine, symptoms do not occur in the "classic" or typical manner in a precise person. Worded a further way doctors are taught "patients don't read the textbooks". Subsequently, you could expertise variations of the reaction such as throat swelling or tightening, burning when swallowing, a lump in the throat or a sense of swallowing difficulty but not make the connection to what you ate or what is happening to you.
You or your doctor might possibly misinterpret your symptoms. Regularly men and women just assume it happened due to the fact they were getting a choking spell on food that was poorly chewed, swallowed too fast, or eaten or drank though too hot or cold. Generally, it is assumed that an esophageal (swallowing tube) disorder, particularly acid reflux with a hiatal hernia is the cause. Acid reflux can trigger an esophageal constriction named a stricture or ring that can result in a food sticking sensation, but this is typically linked with heartburn symptoms or food obtaining stuck which then prompts an upper endoscopy or scope exam. Other times, in particular if occurring in an elderly individual, a neurological condition like stroke or Parkinson's illness is blamed. Occasionally doctors make a decision that your symptoms are due to a nervous reaction or neurosis that historically was referred to as as globus hystericus. The hystericus portion of the term is in most cases dropped these days to the shorter term globus or globus sensation specially since it is not proven it is due to a psychiatric predicament. Even so, globus might possibly be the diagnosis arrived at if your complaint is that you feel a lump in your throat and an 'evaluation" appears to turn up nothing even if OAS was not considered or excluded.
An unusual condition that has been even more lately recognized in the field of gastroenterology (diseases of the stomach and intestines) that might possibly be related to or a variant of OAS is named eosinophilic esophagitis (EE) or allergic esophagitis. It was very first described in the pediatric population but is now recognized to happen in adults. Classically described in teenage boys and young men who presented with food sticking episodes with out heartburn or acid reflux symptoms, it is connected with a strange appearance of the esophagus on endoscopy (lighted scope exam of the upper gastrointestinal tract). What the doctor performing the scope sees is that the esophagus resembles a cat's esophagus. That is it looks like it has rings (cats have cartilage rings in their esophagus, we do not) and this is referred to as "ringed esophagus" or felinization of the esophagus. On biopsy of such a ringed or felinized appearing esophagus (that is also generally narrowed resulting in food sticking) microscopic signs of allergy are noted. The lining shows many eosinophils, a reddish pink appearing white blood cell, characteristic of allergic conditions. These eosinophils release chemicals like histamine that trigger swelling, discomfort, and damage to tissue.
Food allergies are typically located to present in EE though in some cases the search for a food allergy by standard skin tests or IgE blood tests is negative. Therapy is avoidance of known food allergens and swallowed nasal steroids sprays that are designed for use in the nose for nasal allergies. Although not particularly proven however, eosinophilic esophagitis (EE) could possibly be a variant of OAS.
Eosinophilic gastroenteritis and eosinophilic or allergic colitis also exist and can be diagnosed by biopsies of the stomach, smaller intestine and colon respectively. Allergic colitis is ordinarily seen in infants who have a cow's milk protein allergy. It presents as colic sort abdominal discomfort, diarrhea, weight loss and bloody diarrhea in an infant on cow's milk formula or occasionally in breast-fed infants whose mom is drinking a lot of cow's milk.
Allergic gastroenteritis occurs in any age group presenting usually as abdominal discomfort, with or without having intestinal blockage or perforation diarrhea anemia weight loss and microscopic bleeding in the intestinal tract also recognized as occult blood in the stool. Such bleeding is detectable only by special stool chemical tests known as fecal occult blood tests (FOBT) or stool guaiac testing.
At least some many people with food intolerance that does not make sense on restricted diet plan diary data, blood tests, biopsies, or allergy testing, may possibly have a form of OAS. In other words, the presence of recognized pollen or latex allergies might be predisposing to reactions to foods identified to cross react with allergies noted in OAS. However, instead of classic oral allergy syndrome symptoms other stomach and intestinal symptoms or even non-gastrointestinal symptoms may result.
Support of this concept can be found in detailed screening of people for food intolerance. Those with known pollen or latex allergies, any identified food allergies or intolerance including gluten intolerance (celiac illness) and casein intolerance, are asked to complete a series of symptom assessments and severity rating scales followed by a strict elimination diet plan. This is followed up by re-assessment of response of symptoms even though re-introducing foods one at a time though monitoring for recurrence.
This type of analysis is the basis for the Neopaleo Specific Diet plan. In the close to future on the internet symptom assessments and screening for food intolerance along with dietary recommendations precise to people will be offered at . An on line diet symptom diary will also be available. A simplified table illustrating the normal foods that could possibly cross-react with the broad categories of pollen allergens and latex allergy is available. Food intolerances are extra typically being recognized as a normal cause of illness and symptoms. Individualized distinct diet plan recommendations and elimination diet plan trials could possibly be extra helpful in discovering any attainable links to what you are eating and how you really feel.
Copyright 2006 The Food Doc, LLC. All rights reserved.
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