By definition, allergy is a condition where a person has hypersensitivity to an environmental, drug, or food antigen (allergen) caused by an altered or unusual immune system reaction to the antigen.
Allergenic foods can impact the lungs when an allergic reaction individual inhales food particles that may have been released when the food was cooked or that were dispersed in aerosol form. Allergy to the allergens in cooked food has been reported by highly allergic patients who were exposed to their allergenic foods (say, fish, shellfish, or eggs) in an enclosed area (for example, a restaurant dining room) or during meal preparation. Most cases of asthma triggered by aerosolized food allergens involve adults engaged in specific occupations that regularly expose them to the allergens. In contrast, most cases of asthma in children are triggered when the allergen is eaten, not inhaled.
Many experts believe that if a baby can be protected from becoming sensitized to the most highly allergenic foods when their healthy immune system and the digestive tract are in the most vulnerable stage for allergy to develop, the incidence of lifelong food allergy and potentially life-threatening anaphylactic reactions to foods will be reduced and hopefully entirely prevented. When a baby has been identified to be at risk for developing allergy, measures to reduce allergic sensitization might be implemented at birth and the problems associated with future food allergy may be significantly reduced. However, as we shall see in later discussions, experts disagree on the best way to avoid this early allergic sensitization.
The reaction of asthmatics to these chemical compounds is not an allergy, but is more correctly described as allergy intolerance because the initial response is not a triggering of the immune system. The process involves an increase in the level of the inflammatory mediators that are responsible for the bronchospasm of asthma. These mediators include histamine and leukotrienes. They are released during the reaction to an allergen, and cause the muscular contractions that result in the difficulty in breathing and wheezing that are typical of asthma. By inhibiting (or turning off) other types of mediators, the chemicals in the food additives cause an increase in the level of antihistamine and leukotrienes. This results in increased bronchospasm, and a definite worsening of the asthma symptoms.
Oral allergy syndrome is an allergic reaction to food that is confined to the oral cavity (i.e., to the lips, and around the lips, roof of the mouth, tongue, hard and soft palate, and uvula) and adjacent structures. It differs from other food allergy in that its symptoms do not appear in any other location in the body, and always accompany respiratory allergy to inhaled allergens of plants, particularly plant pollens. Of course, symptoms in the mouth, throat, and upper respiratory tract can be part of a generalized reaction to foods, but in this case they are more accurately described as oral allergy symptoms. The term oral allergy syndrome applies specifically to pollen allergy (pollinosis) accompanied by reactions to certain raw foods when they are in direct contact with oral tissues. Individuals with Oral allergy syndrome typically have hay fever symptoms caused by allergies to trees, grasses, and weeds. They experience irritation in the mouth (lips, tongue, roof of the mouth) and sometimes the throat after eating specific types of raw fruits, vegetables, and sometimes nuts.
Egg allergy is likely more of interest to parents, parents who have children that must be vaccinated. This concern is because many vaccines are made from chicken eggs. It is common that many people are having allergies or reactions to vaccines that are made by egg. There are some symptoms or reaction can cause redness around the vaccination site like a skin rash. (more…)
Patients (and many doctors) frequently use the term ‘allergy’ when referring to any adverse drug reaction, even one that has no features of an IgE-mediated allergy response. However, IgE-mediated allergy explains only about 10% of all adverse reactions to antigen antibody reactions from antibiotics. Patients who have experienced unexplained symptoms during treatment with two or more antibiotics are often said to have ‘multiple antibiotic allergy’; using this definition, the description can be applied to one patient in every 22. (more…)
Do you have a food allergy? A recent study by the U.S. government has concluded that data from the past on food allergy was not accurate at all in defining food allergy. The studies performed poorly and have a high rate of misdiagnosis. Only four percent of the adult population of the United States has a real food allergy, according to the website of the Mayo Clinic. (more…)
Do you know that can find dust mites everywhere and in every home? Even though your home is clean, it doesn’t matter, you may still find dust mites. Dust mites are usually the most common type of allergens that can cause asthma and allergies. At one time this type of allergens strike you, you will find difficulties in breathing. (more…)
Seasonal allergic rhinitis is stimulated by an allergic reaction of human body to pollen and spores. This is much depending on the season and region as they are carried by the wind. Your doctor may recommend you to undergo allergies medication that depends on your type of allergy rhinitis. (more…)
B cells
The main function of B cells is to produce antibodies. Antibodies are complex molecules produced by the immune system in response to antigens. As mentioned previously, antigens are foreign proteins or glycoproteins (a sugar linked to a protein) that trigger the immune response. Every living cell produces several different proteins, each unique to its own cell type and species. The antibody produced against the antigen is entirely specific to that antigen. (more…)
It will be helpful for you to have some understanding of the terms that are currently being used by practitioners in the field of allergy so that you can understand the medical literature as you search for information on your child’s allergy. Understanding the terms will also pave the way for our discussion of why your child has allergies and what is happening in his or her body when an allergic reaction is occurring. (more…)
It is now almost a century since the pioneering work of Noon and Freeman was used to successfully treat hay fever symptoms using a low-dose incremental schedule of pollen injections. Noon based his doses of pollen extract on a pollen weight unit that remained in use for over 70 years; (more…)
How frequently do you drink milk everyday or every week? Feel something strange after you drink your last milk? Perhaps you don’t believe that milk can cause allergies. Milk is one of all around and completes food and this liquid is good for your health. A glass of milk contains a rich diet and good for everyone. There is no way that a glass of milk can cause harm to anyone. However, how if you are allergic to milk products? (more…)
