Showing posts with label immune system. Show all posts
Showing posts with label immune system. Show all posts

Thursday, October 27, 2011

The Hay Fever Diet


For everyone, especially those will an illness or aliment, it seems as if the doctor will often state the importance of an appropriate diet and frequent exercise. For some things, this can be a very specific diet, such as the DASH diet for those needing to lower blood pressure and the BRAT diet for many pediatric patients. But is there a diet, or any dietary recommendations to help alleviate the symptoms of hay fever.

The Hay Fever diet-

Also derived as the Mediterranean diet because, as will be stated, the diet consists of many fresh fruits and vegetables, fish, nuts and other high antioxidant loaded foods.

Dig In

 Because hay fever is results in inflammation, it is advised to eat foods that have anti –inflammatory properties.

            Nuts- With a high amount of magnesium and vitamin E, nuts can help improve lung function, which is especially beneficial to asthmatics as well. Also because Vitamin E boosts the immune system, it can help the body fight against URIs (upper respiratory infections), and from damaging free radicals, which also cause inflammation.

             Apples, Oranges, Tomatoes, and other Vitamin C fruits- Because Vitamin C is an antioxidant, has many of the properties like Vitamin E such as protecting the body from free radicals thus reducing potential oxidizing tissue inflammation and damage.

Grapes (Red with skins)- Grapes are also filled with antioxidants, but also have resveratrol, which is the same chemical in red wine that gives it some healthy heart benefits when taken in moderation.  Resveratrol works not only for Hay Fever by reducing inflammation, but can also lower LDLs, the “bad cholesterol”.
            
            Fish- Cold-water fish, algae, and supplements, have high amounts of the omega-3 fatty acids DHA and EPA, which are believed to reduce inflammation in the body. Some of the popular fish diet options include salmon, mackerel, trout, herring, sardines, and albacore tuna. Fish oil or omega-3 supplementations are also believed to be as beneficial.
            
           Tea- Especially a hot tea with lemon or honey is usually recommended for those with hay fever first thing in the morning. Some anti-inflammatory compounds in teas, flavonoids, work along with boosting immunity as well. Tea also works by “waking up” the cilia, the tiny hairs in the nasal passageway, to sweep out the pollen and dust. This will also allow mucus to flow more naturally therefore decreasing stuffiness or the morning sneeze attacks. 


Proceed with Caution

Spicy foods work well by be easing congestion and thinning mucus, but can be harmful by irritating the throat which may cause even more excessive mucus and cough. These include; Cajun spices, Garlic, and Horseradish

Steer Clear

Margarine is made of artificial unhealthy fats, which boost inflammation. A diet high, or even containing margarine, is stated to increase the risk of having allergies and respiratory wheezing.


Sunday, September 18, 2011

Allergy Skin Tests


Allergy Skin Tests

With hay fever, the most common thing you are told is to avoid your triggers. But what if you don’t know what the triggers, how are you supposed to avoid them? How do you find out what they are?

Allergy skin tests are designed to help expose whether or not a suspected allergen is actually what is causing the allergic reaction. To gather information on what could be a possible suspected allergen is through the medical history.  During the medical history some questions that may be asked include: How long have you had the allergy? Where do you live? How long do the symptoms last for? Where do you work or what are some environmental exposures?

After gathering the information, the suspected allergen will then be introduced in one of three ways- a skin prick test, skin injection test, and patch test.

            Skin Prick Test- is done with a lancet injected different allergens. The results usually come in about 15 minutes. It can be done with as many as 40 different substances to see if the allergies are from pollen, mold, pet dander, dust and even food allergies. If a skin prick test is positive, there will be a skin response This could be a raised, red itchy lump- somewhat like a mosquito bite.

            Skin Injection Test- a test that, like the skin prick, injects a small amount of allergen extract into your skin. The difference is that instead of a lancet, it is used with a needle to be a little deeper as an intradermal test. In about 15 minutes, there will be signs of an allergic reaction- this test isn’t very common for hay fever like the skin prick test, but more for allergies to venoms or specific medications.

            Patch Test- tests to see if there is an allergic reaction by not injecting an allergen, but instead applying it to a patch, which will be placed on the skin. Like the injection test, this isn’t very common for hay fever, but more for contact dermatitis, such as latex or preservative allergies. The patch will be worn for 2 and irritation will indicated a positive test.  

All of these tests are used in order to pinpoint what your allergies are in order to avoid them. This means may not be necessary for everyone, but more for those who really need to know, are more susceptible, and have very severe allergies. Talk to your doctor about if this interests you to see when/how you can receive this testing. 


Sunday, August 28, 2011

Immunotherapy- A Medication Alternative


Immunotherapy- The Medication Alternative


Pills aren’t working? Are those alternate therapies not doing the trick? Or are you just sick (physically and mentally) of your symptoms being so intense and irritating every day or allergy season?
These are just some of the reasons why many patients venture to the care and treatment of hay fever through immunotherapy.

What even is immunotherapy though?

Immunotherapy is treatment targeted often to type I hypersensitivity, which uses desensitization therapy. Also, usually works best with hay fever patients. How it works is through the involvement of environmental control of external allergens in addition to the titrated pharmacologic exposure to them as well. With environmental control, a plan has to be made to decrease the exposure to the specific allergen(s). The pharmacologic desensitization process involves injections of the allergen (antigen) regularly through a course of time. This usually will last anywhere from months to years depending on the extent and progress. Throughout the time period, the dosages of allergen will be increased as tolerated. This will hopefully cause a change in the immunoglobins so that there will be an increase of IgG and IgA blocking antibodies as opposed to the abundance of IgE..

However immunotherapy doesn’t always work and may not be a complete treatment to allergy symptoms.  Also it has been reported that the relief to certain grasses and pollens usually last about 4-5 years.

Some considerations before getting involved

If you are thinking about getting immunotherapy keep a couple of things in mind. Such as the commitment it will take -the years of having to come in for the shots. Also it is an expensive process- you must weigh the costs of this with the costs of the medications you normally use.  Immunotherapy is not a definitive treatment and does not yield the same results for everyone.  Age is an important consideration- immunotherapy shots are usually not given to children under five and to older adults (65+ depending on medical status). Lastly, there are some medication conditions that may be present to prevent you from receiving immunotherapy. These include immunodeficiency diseases, recent heart attack or unstable angina, current use of beta blockers. 

Remember if you are considering this to ask your physician about any concerns or questions you may have. 

Friday, August 5, 2011

Some of the Physio

As mentioned before, the overall concept of hay fever is caused by the bodies sensitization to a specific allergen. But how exactly is this caused?

Our immune system is made up of several structures; this includes skin and mucous membranes, the mononuclear phagocyte system, the lymphoid system, and bone marrow which all have different types of white blood cells, also known as leukocytes. Leukocytes help protect the body through inflammation and immunity.  T Lymphocytes (or T cells) are the mediators of specific immunity which act by reacting to the presence of a specific antigen (marker of a foreign substance) body and stimulates B Cells to make antibodies, a protein complex which react to the antigen.

In hay fever this antigen is caused by the presence of an otherwise substance that isn’t harmful. This is an allergen that after repeated exposure causes a hypersensitive reaction. The primary antibody responsible for mediating this reaction is immunoglobin E, or IgE. The IgE binds to receptors on other cells in the immune system known as mast cells. This IgE Mast Cell complex can bind to passing antigens (the specific allergen) and create a crosslink (when two antibody ends attach to an antigen) therefore causing an increase of intracellular calcium in the mast cell. This increase causes local mast cell degranulation resulting in the symptoms of inflammation. This may cause other inflammatory cells, and as for the case of hay fever, basophils to also release chemicals. The primary receptors to these are histamine. (That is why a lot of allergy medications are classified as antihistamines). Histamine causes a variety of symptoms, which may vary in severity. Some of the effects of histamine include bronchoconstriction, vasodilatation, increased mucus secretion, and pruritus (itching).

This however depends how the allergen entered the body and how much. For those with hay fever the most common is the allergic rhinitis (because the allergen enters through the nasal passageway). These symptoms also occur only when the allergen is present (or in high enough levels) for the antibodies to react. That is why for those with seasonal allergies they vary on location and pollen levels and for those with chronic have to make lifestyle changes depending on the cause.