What allergies does rast test for
Foods can cause numerous diverse types of allergic symptoms. Some persons experience gastrointestinal problems such as cramping, constipation or diarrhea. Other persons suffer from skin rashes (hives or eczema). Less commonly, some may experience serious life-threatening reactions such as: asthma, throat closing or loss of consciousness. A food that causes allergic symptoms generally causes similar symptoms on each repeated exposure, provided that the same quantity of food is eaten each time (rarely symptoms can be more severe). Some persons are allergic only to raw foods while others are allergic only to cooked foods.
(Most persons will react to both).
Extremely little amounts of foods may trigger allergic reactions and as a result, are often hard to identify.
Food allergy symptoms can be immediate; generally beginning within 2 hrs. of ingestion, or delayed; in which symptoms which may not develop for up to 72 hrs. «Immediate» food allergies are suspected when allergic antibodies (IgE) are detected in the blood by laboratory RAST testing or by skin prick testing. The presence of allergic antibodies to foods alone is generally not sufficient to diagnose a food allergy. The confirmation of food allergy often requires challenge testing.
Challenge testing is performed only in situations in which a food is suspected of causing non-life threatening symptoms. If a food were strongly suspected of causing dizziness, throat swelling, (body tissue swelling) or shortness of breath, then challenge testing would not generally be recommended.
RAST testing reports the presence of allergic antibodies in the blood. Typically they are given numerical scores/classes (0 to 6). Class 0-1 is called «equivocal» and is rarely if ever significant. The higher the RAST class/score, the more likely it is that a true food allergy exists. Challenge testing should start with the highest-RAST class foods and continue until all positive foods own been tested.
Allergy symptoms that repeatedly develop after challenge testing with a food confirms sensitivity (allergy) and the lack of allergic symptoms generally disproves allergy. Not every RAST or skin test positive foods will cause allergy symptoms. Foods that are RAST or skin test negative rarely if ever cause immediate allergy symptoms. To be absolutely certain no allergy exists, challenge testing is occasionally recommended when skin testing and/or RAST testing is negative. (Challenge testing to RAST or skin test negative foods is generally not necessary).
Childhood eczema is the most common disease in which challenge testing is used to confirm food allergy.
If eczema is the only allergic symptom thought to be triggered by foods, it is generally extremely safe to act out food challenge testing and this can be done at home. Challenge testing is often recommended when multiple foods are noted to own stimulated allergic antibodies to determine which of the foods are most likely to be causing the allergic symptoms. If serious allergic symptoms are possibly due to a food (but unlikely) (i.e. no allergic antibodies can be detected), challenge testing may occasionally be recommended, but this should be done only in a safer environment such as a hospital ER waiting room.
Again it must be stressed that if testing has detected allergic antibodies to a food and serious allergic symptoms are likely to own occurred following ingestion, avoidance is the only safe recommendation.
Before challenge testing is done, every suspected foods are generally eliminated from the diet for at least 2 weeks (or at least those foods with a RAST class 2 or greater score).
Selecting only RAST test negative foods to eat is the «best» way to develop an elimination diet. Anti-histamine use should be stopped at least 5 days before challenge testing. Food challenges are done with only one food at a time. The food should be eaten slowly over a one hour time period and only water should be used as a drink. The largest quantity of the food that is ever generally eaten should be consumed (i.e. a normal portion). No other foods should be given for 3 hours and no additional foods suspected of causing allergy (RAST positive foods) should be eaten for at least two days to observe for the development of any «delayed» allergic symptoms.
If allergic symptoms develop at any time during the challenge test, the allergy medications contained in the key chain carrier that we own provided to you should be taken. The Epi-pen is used for severe life-threatening symptoms such as throat closing, severe cough (possible asthma), wheezing, shortness of breath or dizziness/passing out. If an Epi-pen is ever used you should call 911 immediately after.
If allergic symptoms are thought to happen following a challenge test, repeating this challenge on another day may be necessary to be certain it has caused the problem.
In children, finish avoidance of any food proved to be causing allergic symptoms should continue for at least 2 years before re-exposure is attempted. Peanut, tree nuts, egg and seafood allergies are less likely to be ever «out-grown.» Food allergies in adults do not typically ever «go away.» If you do not understand challenge testing after reading this instruction sheet please call 499-0033 for further clarification before beginning. Never act out a challenge test on any food suspected of causing allergic reactions without a doctor’s approval.
Michael & Adrianne Vaughn
What is an allergy attack?
When IgE is produced it is specific to the allergen. What that means is if you are exposed to cat and your body mistakes it as something harmful to you your immune system produces anti-cat IgE antibody. If you are also allergic to dust your produce an IgE antibody to dust. Each time IgE is produced, the IgE molecules attach themselves to mast cells that are found in large numbers in the eyes, nose, lungs, intestines, and immediately beneath the skin.
These mast cells contain numerous chemicals, including a substance called histamine which, when released into the body, can cause runny nose, sneezing, watery eyes, itching, hives, and wheezing. These are the symptoms that people who suffer from allergies live with.
In some cases, reactions can happen in several places throughout the body. Welts or hives may appear, spasm in the lungs may cause coughing or wheezing, the throat and tongue may swell; if anaphylaxis (severe allergic reaction) occurs, it may be fatal.
Can Allergies be Controlled?
Avoidance is the best defense against allergies.
At your first appointment we will be discussing methods you can use into your home to lessen the allergen in your environment.
If you are unable to avoid the allergen, medications may be taken to relieve symptoms. Medications may assist relieve symptoms, but they do not alter the allergy immune response.
If symptoms cannot be controlled, allergy shots may be prescribed. Often people take allergy shots because they don’t desire to take medications every day. Allergy shots can put your allergies into remission.
Read more about allergy shots on our website.
Tips to Remember are created by the Immunotherapy Committee of the American Academy of Allergy, Asthma and Immunology.
What is an allergy?
When your body comes in contact with a virus or bacteria the immune system protects your body by producing antibodies and other substances to fight off these invaders. An allergy or an allergic reaction is when the immune system recognizes a harmless substance as an invader and tries to protect the body from it. The antibody in this case that is produced is called immunoglobulin E, or IgE.
take more medication than recommended in an attempt to lessen your symptoms.
mow lawns or be around freshly cut grass; mowing stirs up pollens and molds.
rake leaves, as this also stirs up molds.
hang sheets or clothing out to dry.
Pollens and molds may collect in them.
grow too numerous, or overwater, indoor plants if you are allergic to mold. Wet soil encourages mold growth.
Tips to Remember are created by the Public Education Committee of the American Academy of Allergy, Asthma and Immunology.
What is allergic disease?
Approximately 50 million Americans suffer from some form of allergic disease. Allergic disease can develop at any age, and heredity plays a key role in who will develop it.
If one parent has allergic disease, the estimated risk of the kid to develop allergies is 48%, and the child’s risk grows to 70% if both parents own allergies.
Symptoms of allergic disease are the result of events occurring in your immune system — the body’s defense mechanism against harmful substances. The body of an individual with allergic disease identifies some substances, called allergens, as harmful. These substances, which are harmless to most people, trigger allergic reactions within that person’s immune system.
When someone predisposed to allergic disease encounters an allergen to which they are sensitive, a chain of events occurs.
The primary culprit instigating these events in people with allergies is an antibody called Immunoglobulin E, or IgE. IgE «defends» the body by seeking to remove the offending allergen(s) from the body’s tissues and bloodstream. The first time an allergen enters an allergic person’s body, IgE antibodies are produced in response. These antibodies then travel to cells called mast cells, attach themselves to these cells, and wait for the next time the allergen(s) enters the system.
When they do, the IgE antibodies «capture» the allergens, essentially removing them from circulation.
The mast cells then help further by releasing special chemicals called mediators. These mediators produce the classic symptoms of allergic reactions — swelling of body tissues, sneezing, wheezing, coughing and other symptoms. Due to the complexity of allergic disease, it is not yet fully understood why some substances trigger allergies and others do not, nor why every person does not develop an allergic reaction after exposure to allergens.
Role of the allergist — management and treatment
An allergist/immunologist is a physician specially trained to manage and treat allergies and asthma. Becoming an allergist/immunologist requires completion of at least nine years of training.
After completing medical school and graduating with a medical degree, a physician will then undergo three years of training in internal medicine (to become an internist) or pediatrics (to become a pediatrician). Once physicians own finished training in one of these specialties, they must pass the exam of either the American Board of Pediatrics (ABP) or the American Board of Internal Medicine (ABIM). Internists or pediatricians who wish to focus on the subspecialty of allergy/immunology then finish at least an additional two years of study, called a fellowship, in an allergy/immunology training program.
Allergist/immunologists who are listed as ABAI-certified own successfully passed the certifying examination of the American Board of Allergy and Immunology (ABAI), following their fellowship.
As a result of this extensive study and training, an allergist/immunologist is the best-qualified medical professional to effectively manage the comprehensive needs of patients with allergic disease. Allergist/immunologists are trained in the prevention, diagnosis, and treatment of immune system problems such as allergies, asthma, inherited immunodeficiency diseases, autoimmune diseases and even AIDS.
Unlike a freezing, allergic disease is not a condition that someone can just «get over.» The assist of a trained allergist/immunologist can reduce how often patients need to stay home from work or school due to symptoms. Studies show that those under the care of an allergist/immunologist also make fewer visits to emergency rooms, and are better capable to daily manage their allergies and asthma.
If you are enrolled in a managed care organization, your insurer will own a specific set of guidelines that assist your primary care physician decide when to refer you to an allergist/immunologist.
Once you are referred, the allergist/immunologist will work to accurately diagnose your condition by taking a thorough patient history, including information about your symptoms, family history, and home and work environments. Your allergist/immunologist will also conduct allergy skin testing and any other needed tests. Combining specific information from your history and tests, the allergist/immunologist will be capable to make an precise diagnosis. To assist prevent symptoms, he or she will work with you to develop an appropriate management plan and will prescribe the most cost-effective treatment, including recommendations for specific medications and/or devices, and any needed environmental control measures.
Your allergist/immunologist and allied health staff will not only prescribe medications and devices, but will also show you how and when to use them.
Dos and Don’ts
Following are someDosandDon’tsthat you may desire to follow during the pollen and mold seasons to lessen your exposure to the pollens or molds that trigger your allergy symptoms.
Effects of weather and location
Weather can influence hay fever symptoms.
Allergy symptoms are often minimal on days that are rainy, cloudy or windless, because pollen does not move about during these conditions. Boiling, dry and windy weather signals greater pollen and mold distribution and thus, increased allergy symptoms.
If you are allergic to plants in your area, you may believe that moving to another area of the country with diverse plants will assist to lessen your symptoms. However, numerous pollens (especially grasses) and molds are common to most plant zones in the United States. Additionally, other related plants can also trigger the same symptoms. Numerous who move to a new region to escape their allergies discover that they acquire allergies to new airborne allergens prevalent in their area within one to two years.
Therefore, moving to another part of the country to escape allergies is often ultimately disappointing, and not recommended.
Appropriate treatment-not escape-is the best method for coping with your allergies. If your seasonal allergy symptoms are making you miserable, see your allergist/immunologist, who will take a thorough history and conduct tests, if needed, to determine exactly which pollens or molds are triggering your symptoms. He or she will assist you determine when these airborne allergens are most prevalent in your area.
To lessen your symptoms, your allergist/immunologist may also prescribe an allergy nose spray, non-sedating antihistamine, decongestant or other medications.
If your symptoms continue or if you own them for numerous months of the year, your allergist may also recommend immunotherapy treatment, also called allergy vaccinations or shots. This treatment involves receiving injections periodically-as sure by your allergist/immunologist-over a period of three to five years.
This treatment helps your immune system to become more and more resistant to the specific allergen, and lessens your symptoms as well as the need for future medications.
What is the difference between allergies and a cold?
Cold and allergy symptoms are generally extremely similar, but the main difference is the length of time that symptoms final. A freezing normally disappears after a week. Allergies, on the other hand, can final for weeks or even longer.
The following chart provides a few guidelines to assist you differentiate between a common freezing and allergies.
Tips to Remember: Role of the Allergist/Immunologist
If you own been diagnosed with asthma or allergies, your physician will likely refer you to an allergist/immunologist for care. You may wonder: What is allergic disease? How can an allergist/immunologist help? This sheet is intended to provide information on allergic disease and on the role that an allergist/immunologist plays in the appropriate management and treatment of these diseases.
Pollen and mold counts
Pollen and mold counts measure the quantity of airborne allergens present in the air.
Counts are compiled by a variety of methods. Pollen and mold spore counts can be sure daily, and are reported as grains per cubic meter of air. Certified aeroallergen counters at numerous universities, medical centers and clinics provide these counts on a volunteer basis.
The National Allergy BureauT (NABT) is the nation’s only pollen and mold counting network certified by the AAAAI. As a free service to the public, the NAB compiles pollen and mold counts from certified stations across the nation and reports them to the media three times each week.
These counts are also available on the NAB sheet of the AAAAI’s Web site, www.aaaai.org.
Interpretation of pollen and mold counts and their relationship to symptoms is complicated. Sampling techniques such as the type of device used and its location within the community can affect counts. While numerous patients develop symptoms when pollen counts are 20-100 grains per cubic meter, one’s symptoms may also be affected by recent exposure to other allergens, the intensity of pollen exposure, and individual sensitivity.
Pollen counts reported to the public are generally taken the preceding one to three days, and may vary widely from day to day during a season. Overall, the use of pollen counts in predicting symptom severity in a given individual is somewhat limited.
On this sheet you will discover information on:
Allergic disease, Allergy Testing,Stinging Insect Allergy,Latex and
keep windows closed at night to prevent pollens or molds from drifting into your home.
Instead, if needed, use air conditioning, which cleans, cools, and dries the air.
minimize early morning activity when pollen is generally emitted-between 5-10 a.m.
keep your car windows closed when traveling.
try to stay indoors when the pollen count or humidity is reported to be high, and on windy days when dust and pollen are blown about.
take a vacation during the height of the pollen season to a more pollen-free area, such as the beach or sea.
take medications prescribed by your allergist/immunologist regularly, in the recommended dosage.
Seasonal allergic rhinitis, often referred to as «hay fever,» affects more than 35 million people in the United States.
These seasonal allergies are caused by substances called allergens. Airborne pollens and mold spores are outdoor allergens that commonly trigger symptoms during the spring and drop. During these times, seasonal allergic rhinitis sufferers experience increased symptoms-sneezing, congestion, a runny nose, and itchiness in the nose, roof of the mouth, throat, eyes and ears-depending on where they live in the country and the exact allergen to which they are allergic.
Pollens are the tiny, egg-shaped male cells of flowering plants. These microscopic, powdery granules are necessary for plant fertilization. The average pollen particle is less than the width of an average human hair.
Pollens from plants with bright flowers, such as roses, generally do not trigger allergies.
These large, waxy pollens are carried from plant to plant by bees and other insects. On the other hand, numerous trees, grasses and low-growing weeds own little, light, dry pollens that are well-suited for dissemination by wind currents. These are the pollens that trigger allergy symptoms.
Seasonal allergic rhinitis in the early spring is often triggered by the pollens of such trees as oak, western red cedar, elm, birch, ash, hickory, poplar, sycamore, maple, cypress and walnut. In the tardy spring and early summer, pollinating grasses-including timothy, bermuda, orchard, sweet vernal, red top and some blue grasses-often trigger symptoms.
In addition to ragweed-the pollen most responsible for tardy summer and drop hay fever in much of North America-other weeds can trigger allergic rhinitis symptoms.
These weeds include sagebrush, pigweed, tumbleweed, Russian thistle and cockleweed.
Each plant has a period of pollination that does not vary greatly from year to year. However, weather conditions can affect the quantity of pollen in the air at any given time. The pollinating season starts later in the spring the further north one goes. Depending on where you live in the United States, the pollen season can start as early as January (in the southern states). Generally, the pollen season lasts from February or March through October.
Trees pollinate earliest, from tardy February through May, although this may fluctuate in diverse locations-starting in April in the northern United States to as early as January in the south. Grasses follow next in the cycle, beginning pollination in May and continuing until mid-July. Weeds generally pollinate in tardy summer and early fall.
Molds are microscopic fungi-related to mushrooms-but without stems, roots or leaves. Their spores float in the air love pollen, and are present throughout the year in numerous states. Unlike pollens, molds do not own a specific season, but are affected by weather conditions such as wind, rain or temperature. Outdoor mold spores start to appear after a spring thaw and reach their peak in July in warmer states and October in the colder states.
Molds can be found every year endless outdoors in the South and on the West coast.
Common airborne molds include alternaria, cladosporium and aspergillus. Molds are present in almost every possible habitat. Outdoors, they can be found in soil, vegetation and rotting wood. Molds can also be found indoors in attics, basements, bathrooms, refrigerators and other food storage areas, trash containers, carpets and upholstery.
Common allergic diseases include:
*Allergic rhinitis, or «hay fever.» In the United States, approximately 35 million people suffer from this disease, which is characterized by sneezing, congestion, itching and dripping of the nose, and itchy, watery eyes.
*Asthma, a chronic lung disease characterized by coughing, chest tightness, shortness of breath and wheezing.
Asthma affects more than 17 million Americans, and asthma cases appear to be increasing annually. Asthma symptoms may be triggered by allergens or other, non-allergic stimuli, such as respiratory tract infections, freezing air or tobacco smoke.
*Sinusitisand otitis media, common allergic diseases often triggered by allergic rhinitis. Sinusitis is an inflammation of the nasal sinuses, which are hollow cavities within the cheek bones found around the eyes and behind the nose. This condition affects over 15% of the U.S.
population. Otitis media — or common ear infections — is the most common childhood disease requiring physician care.
*Atopic dermatitis, also called eczema. Symptoms of this allergic skin condition include itching, reddening, and flaking or peeling of the skin. This rash is generally seen in young infants, but can happen later in individuals with personal or family histories of atopy, meaning asthma or allergic rhinitis.
*Urticaria, also known as hives, and angioedema. Hives are itchy, red bumps that appear on the surface of the skin. They can happen in clumps and range in size, and can be either chronic — appearing and disappearing for no reason — or acute.
Triggers of acute hives include infection or ingestion of some foods or medications. Often appearing with hives, angioedema is a non-itchy swelling in the deeper layers of the skin.
*Anaphylaxis, a severe, systemic allergic reaction generally caused by substances that are injected or ingested (eaten), including some foods and medications, insect stings and latex.
Symptoms can include a feeling of warmth, flushing, tingling in the mouth, a red, itchy rash, feelings of light-headedness, shortness of breath, severe sneezing, anxiety, stomach or uterine cramps, and/or vomiting and diarrhea. In severe cases, a drop in blood pressure results in a loss of consciousness and shock. Without immediate treatment — an injection of epinephrine (adrenalin) and expert care — anaphylaxis can be fatal.
Role of the patient — communication
To ensure optimal care, patients with allergies and asthma must take an athletic role in their treatment by asking questions, learning about triggers of their condition, and understanding reasons for various methods of treatment.
Open communication is a necessary, successful part of allergic disease management. As a patient, you may desire to enquire these questions:
* Is the physician who is treating me or my family specifically trained to make an appropriate diagnosis and provide effective management and treatment of allergic disease?
* Has my physician completed a fellowship in allergy and immunology?
* Does my physician regularly attend continuing medical education programs in allergy and immunology?
* What does the diagnosis and treatment of my allergies and/or asthma entail?
What are my options? Do my symptoms meet insurance guidelines for allergy referral?
* Has the diagnosis and treatment plan my physician prescribed been proven effective by virtue of accepted standards for scientific evaluation?
You and your allergist/immunologist can work together so that you can make appropriate changes in your environment and take medications as prescribed. With appropriate diagnosis and effective management of your allergic disease, you should be capable to experience the optimal quality of life that you deserve.
Your allergist/immunologist can provide you with more information on the management and treatment of allergic disease.
The content of this brochure is for informational purposes only.
It is not intended to replace evaluation by a physician. If you own questions or medical concerns, please contact your allergist/immunologist.
American Academy of Allergy,
Asthma and Immunology
555 East Wells Highway, Suite 1100
Milwaukee, WI 53202
AAAAI Web sitewww.aaaai.org
Colds vs. Allergies
Many people may not realize they own allergies, often attributing their congestion and runny nose to a freezing. Left untreated, allergies can cause more serious conditions love sinusitis or ear infections.
It is significant to decipher between allergies and colds.
|Symptoms||Runny or stuffy nose, sneezing, wheezing, watery and itchy eyes.||Can include fever and aches and pains along with allergy symptoms.|
|Warning Time||Symptoms start almost immediately after exposure to allergen(s).||Usually takes a few days to hit full force.|
|Duration||Symptoms final as endless as you are exposed to the allergen and beyond, until the reaction triggered by the allergen ends.
If the allergen is present year-round, symptoms may be chronic.
|Symptoms should clear up within several days to a week.|
What is an allergy blood test?
Allergies are a common and chronic condition that involves the body’s immune system. Normally, your immune system works to fight off viruses, bacteria, and other infectious agents. When you own an allergy, your immune system treats a harmless substance, love dust or pollen, as a threat. To fight this perceived threat, your immune system makes antibodies called immunoglobulin E (IgE).
Substances that cause an allergic reaction are called allergens.
Besides dust and pollen, other common allergens include animal dander, foods, including nuts and shellfish, and certain medicines, such as penicillin. Allergy symptoms can range from sneezing and a stuffy nose to a life-threatening complication called anaphylactic shock. Allergy blood tests measure the quantity of IgE antibodies in the blood. A little quantity of IgE antibodies is normal. A larger quantity of IgE may mean you own an allergy.
Other names: IgE allergy test, Quantitative IgE, Immunoglobulin E, Entire IgE, Specific IgE
Food allergies are an significant cause of illness in both children and adults. The number of people suffering from food allergies has increased over the final 20 years.
There are two basic types of food allergies, immediate and delayed.
They are also referred to as «obvious» and «hidden» allergies. If someone is exposed to a food and has a reaction instantly or within several hours, it is then considered an «immediate» food allergy.
Sometimes a person will eat a food and not experience any symptoms for hours or even until the next day. This is considered a «delayed» food allergy.
There are two primary antibodies within us that cause food allergies. One is IgE and the other is IgG. Immediate food allergies are caused by the IgE antibody; delayed are caused by the IgG antibody.
For the allergic patient, a harmless allergen is introduced to their system, but these antibodies error the allergen (food in this case) as a harmful substance. This improper recognition triggers a reaction often resulting in symptoms such as irritable bowels, nausea, stomach pain, headaches, hives, rashes, hyperactivity, inattention, nervousness, depression or even anaphylaxis which can be life threatening.
It is estimated that 3-5% of food allergies are caused by the IgE antibody and that approximately 50% are attributed to IgG antibodies.
It is also estimated that IgG4 is responsible for most of the food allergies caused by the «G» antibody. IgG4 against foods indicates that the person has been repeatedly exposed to food proteins recognized as foreign by the immune system. Physicians sometimes act out IgE and IgG4 testing to be thorough.
A person may be capable to eat a food they are allergic to occasionally and suffer no symptoms. However, if a person eats the food daily or several times a day, their tolerance can become compromised and symptoms may happen.
A common trait of people that own food allergies will crave the food(s) they are most allergic to. This is partially due to the fact that when a food allergy causes stress, the body produces endorphins, which provides comfort and a «feel good» factor.
Whether you own a severe food allergy or suffer from food sensitivity, the experienced staff here at the Acadian Allergy Middle are here to assist you identify your allergens, as well as treat and manage your symptoms. Call us at (337) 237-0779 to schedule a consultation today.
LP13959-9 Pandalus borealis
True shrimp are little, swimming, decapod crustaceans classified in the infraorder Caridea, found widely around the world in both unused and salt water.
Shrimp is a highly allergenic food that can cause severe anaphylactic reactions. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details.Source: Wikipedia, Pandalus borealis (Wikipedia)
LP13959-9 Pandalus borealis
Shrimp is considered to be a highly allergenic food and can cause severe reactions. Numerous shrimp species exist, including Pandalus borealis(deep-water shrimp, cold-water shrimp, northern shrimp, Alaskan pink shrimp, northern red shrimp), Penaeus monodon(giant tiger prawn, black tiger prawn, leader prawn, grass prawn), Metapenaeus joyneri(shiba shrimp), and Metapenaeopsis barbata(whiskered velvet shrimp, red rice shrimp, fired prawn).
Tropomyosin, a highly conserved muscle protein, is one of the major allergens in shrimp. Anaphylactic reactions, urticaria, gastrointestinal and respiratory symptoms own been reported in allergic patients. Patients allergic to shrimp typically own allergic reactivity to multiple crustacean species. Copyright Copyright © 2006 Phadia AB.Source: ImmunoCap
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