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Is Crab Good For Asthma

Allergic Sensitization And Ige Binding Patterns To Crab Proteins


When comparing the results of the SPT to the allergograms of allergen reactivity of the same worker, there are several similarities, but also some discrepancies. All workers with elevated specific IgE to crab extracts by ImmunoCap demonstrated also in vitro IgE binding to crab allergens using in-house immunoblots. Several workers who reacted to only some of the SPT extracts show IgE binding to all four extracts in the allergograms. King crab worker number 5 who did not report respiratory symptoms, asthma or allergy was SPT positive to cooked crabmeat and intestines and had IgE binding to several proteins in all four extracts. In contrast, in king crab worker number 2, an elevated IgE in the commercial test to crab was not reflected by respiratory symptoms, asthma, allergy or the SPT, and only a low binding intensity was identified to two proteins in raw meat and one in intestines in the in-house-immunoblot assay. Edible crab workers 2 and 3 had elevated specific IgE to crab by ImmunoCAP, but did not have positive SPT results, nor did they show any IgE binding to cooked crabmeat by immunoblotting. In contrast, edible crab worker number 10 had a high specific IgE to cooked edible crabmeat by ImmunoCAP, positive SPT to cooked meat extract, and strong binding to almost all proteins in the cooked meat extract by immunoblotting. This worker also showed strong IgE binding to proteins in the three other extracts, however SPT was negative to these extracts.

Are Crab Sticks Healthy

Arguably, some people agree that crab sticks are healthy. Others disagree because, like any other processed foods, they contain high levels of sodium and artificial additives.

According to The Japan Times, 50 percent of the ingredients in crab imitations come from whitefish while the other 50 comes from flavors, seasoning, and coloring to give the products the crab-like shape, texture, and taste.

Disodium Inosinate And Guanylate

These are also alternative food enhancers that manufacturers use instead of MSG. Most packed food products contain this additive and the potential side effects include:

  • Numbness and tightness around the mouth and chest
  • Burning sensation around the mouth area
  • Sweating and swelling
  • Skin breakout

If youre intolerant to any of these additives, including MSG, youre highly advised to check the contents of every packed food you before consuming it.

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Testing For Shellfish Allergy

Skin testing is often recommended as a first method of evaluation of shellfish allergy. Interpretation can be difficult due to potential cross-reactivity between types of seafood or between shellfish and dust mites. Skin tests with commercial seafood extracts usually show reliable results, but if there is uncertainty, the actual food can be used. Commercial seafood extracts may also run the risk of false negatives, because the extracts often only have the major allergen tropomyosin and not the secondary allergens like myosin light chain protein and hemocyanin. Dust mites and other cross-reactive species do possess the secondary allergens that can sensitize an individual, making them more susceptible to a subsequent allergic shellfish reaction. So, it is important to test for reactions to dust mites and cockroaches, otherwise the skin testing may be incomplete and lead to falsely negative results.

Food challenges may also be done, most often when skin tests and/or history is inconclusive.

Unorthodox testing is available for food allergy, but is not recommended. Examples of this type of testing includes use of electrodes , cytotoxic testing , iris examination , IgG food antibody testing, hair analysis and more. In addition to being ineffective, these tests can lead to negative consequences for the patient such as unnecessary dietary restrictions and false confidence about protection from allergies.

Urticaria And Protein Contact Dermatitis

Crab Stuffed Mushrooms

By contrast with respiratory allergy, dermatological allergy to seafood has been studied and documented less in the medical literature. The major skin manifestations associated with seafood are contact urticaria and eczematous contact dermatitis of various types. Contact urticaria is associated with direct contact with raw seafood proteins. At least 75% of eczematous dermatitis in the fish processing industry are irritant, and commonly due to contact with water and fish products . Contact with proteinacious materialsuch as seafoodalso causes a chronic recurrent dermatitis commonly known as protein contact dermatitis. However, biochemical sensitisers added to seafood can also cause a delayed allergic contact dermatitis. Occupational case studies have shown that the various dermatological outcomes can also coexist in affected people.

In the seafood industry, the reported prevalence of occupational protein contact dermatitis is 3%11% .Seafood identified in occupational protein contact dermatitis include the crustacean class among the arthropods , molluscs , bony fish class of pisces and other agents derived from seafood . Crustaceans most often produce an IgE mediated contact urticaria, although a delayed contact dermatitis may develop in certain people. In a study of workers exposed to bony fish, the average duration of employment before the development of symptoms was 2.3 years.

Epidemiological studies and case reports of dermatitis due to arthropods, pisces, and molluscs

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Monosodium Glutamate And Hydrolyzed Soy

Soys goodness in our meals ensures a steady supply of plant proteins. However, surimi may contain MSG although its not indicated. MSG enhances the flavor in dishes just like yeast extracts on beer.

Research by the Federation of American Societies for Experimental Biology identified mild symptoms caused by consumption of MSG. However, no serious health risks are associated with the ingredient. The symptoms include:

  • Weakness
  • Tingling or burning sensation

Shellfish Allergy Risk Factors

It is not known for certain why some individuals get shellfish allergies and others do not. However, your risk of having a food allergy increases if your family has allergic illnesses such as asthma or allergic rhinitis. Your chances of having a food allergy is higher if you have two allergic parents than if you only have one.

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Living Life With Crab Asthma

Donna Beck tells her story about living life with crab asthma

My history of working with Grand Atlantic Seafoods and Ocean Choice International from 1997 to 2008.

I began working for Grand Atlantic Seafoods and Ocean Choice International in 1997 and finished in 2008. I was a very healthy individual when I went to work in the crab plant, but over time I found myself getting sick more and more often. I began feeling very short of breath, very tired and I couldnt figure out what was causing my breathing problems. At the time I wrote it off as a result of being around heavy mist in the plant.

But those conditions continued with me, and didnt improve when I began using puffers. In fact, it just kept getting worse. I took more trips to hospital because of lung infections, congestion, shortness of breath, wheezing and tightness in my chest. Many times I had to leave work to go to the emergency department. More puffers, more antibiotics, more steroids. Each time I had to take time off work to try to recover. Each day after work I had to use my nebulizer. It just kept getting worse.

I was at my doctors so often with the same problems time after time, yet they couldnt pinpoint the cause of my illness. At that time, no one had heard of crab asthma yet now we know this asthma is caused by exposure from working in the crab plants with no proper ventilation or breathing protection.

Symptoms Of Food Allergies And Asthma

APM Research: Identifying Crab Apples /Making Crab Apple Jelly / And Crab Apple Cheese.

For most people, the usual symptoms of food allergies are hives, rash, nausea, vomiting, and diarrhea. If you have food allergies that trigger symptoms of an asthma attack, you will likely have these allergy symptoms, followed by coughing and wheezing. And if not caught quickly, anaphylaxis — swelling of the throat, cutting off your airway — may result.

If you suspect certain foods are asthma triggers for you, talk to your doctor. They can give you allergy skin tests to find out if youâre allergic to these foods.

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Health Effects Associated With Seafood Processing

The first published report of occupational allergic reactions due to seafood was by Beshce in 1937. He described a fisherman who developed asthma, angioedema, and conjunctivitis when handling codfish. Various studies have subsequently confirmed that occupational seafood allergy can be manifest as rhinitis, conjunctivitis, asthma, urticaria, and protein contact dermatitis. Systemic anaphylactic reactions have also been reported.Another condition known to be associated with occupational exposure to seafood is extrinsic allergic alveolitis.

Seafood Processing Work Environment

Seafood processing plants vary in the levels of technology, with some of the smaller workplaces relying entirely on manual handling of the seafood and larger companies using modern highly automated processes. There is great variation in processing procedures for the different types of seafood. Common processing, preservation, and storage techniques used for the major seafood groupings, and sources of potential exposure to seafood products are outlined in table .

Common processing, preservation, and storage techniques used for seafood groups that are sources of potential occupational exposure to seafood products

Studies of environmental exposure assessments to measure aerosol particulate and allergen concentrations among seafood processing workers are summarised in table . The lack of standardised methods for environmental sample collection, extraction, and analysis makes comparisons between various studies difficult, although some similarities can be found. It is notable that generally much higher allergen concentrations were obtained with personal than with area sampling. There is great variability of exposure within and among various jobs involved in seafood processing with reported allergen concentrations ranging from 0.001 to 5.061 g/m3.

Studies of environmental assessments of exposure among seafood processing workers

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What Causes Shellfish Allergies

“Shrimp is the leading culprit in this country,” says Dr. Feldweg. But, she adds, in other countries where people tend to eat different types of shellfish, the leading cause can be different.

Shellfish allergies are most commonly caused by crustaceans such as shrimp, lobster, crab, and crayfish. But people have also been known to have a shellfish allergy related to bivalves such as oysters, clams, and mussels, as well as snails, squid, and octopus.

Tips For Consuming Crab

Crab asthma not taken seriously, say plant workers ...

Although crab has complex nutrients and many benefits for our healthiness, but we do not consume crab without rules. Because crab also contains contaminants like heavy metals, dioxin and mercury. So that, before and after consuming crab, we should to notice many things, such as:

Cholesterol in crab is so high, it is 76 mg/100 gram, while cholesterol is recommended for consuming in a day is not more 300 mg. So that, if you want to get health benefits of eating crabs, you should eat it sufficiently and not too excess, because if you eat it too excess, you will not get health benefits, but diseases.

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Occupational Allergic Sensitization Among Workers Processing King Crab And Edible Crab In Norway And Identification Of Novel Putative Allergenic Proteins

  • 1Department of Community Medicine, University of Tromsø The Arctic University of Norway, Tromsø, Norway
  • 2Department of Occupational and Environmental Medicine, University Hospital North Norway, Tromsø, Norway
  • 3Molecular Allergy Research Laboratory, College of Public Health, Medical and Veterinary Sciences, James Cook University, Douglas, QLD, Australia
  • 4Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD, Australia
  • 5Centre for Food and Allergy Research, Murdoch Childrens Research Institute, Melbourne, VIC, Australia
  • 6Department of Medical Biology, University of Tromsø The Arctic University of Norway, Tromsø, Norway
  • 7Department of Aquatic Product Technology, Faculty of Fisheries and Marine Science, Institut Pertanian Bogor University, Bogor, Indonesia
  • 8Melbourne Mass Spectrometry and Proteomics Facility, Bio21 Molecular Science & Biotechnology Institute, The University of Melbourne, Melbourne, VIC, Australia

Introduction: Asthma and allergy occur frequently among seafood processing workers, with the highest prevalence seen in the crustacean processing industry. In this study we established for the first time the prevalence of allergic sensitization in the Norwegian king- and edible crab processing industry and characterized the IgE-reactive proteins.

Seafood Allergy And Iodine Allergy

A common misconception is that individuals with shellfish allergy cannot take iodine or radio contrast material , which is used for contrast radiologic studies like CT scans and angiograms. This is not true. Previously it was believed that the iodine caused allergic reactions, but now it is known iodine itself does not cause allergies or shellfish allergy. Thus, patients with shellfish allergy are not at greater risk of reacting to RCM than non-shellfish allergic patients. Individuals with shellfish allergy are not at greater risk of reacting to iodine and individuals who react to iodine-containing products are not at greater risk of reacting to shellfish.

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Populations At Risk From Exposure To Seafood

Although reactions to seafood have been documented mainly among consumers, immunologically mediated reactions have also been documented at work. This has been found to occur primarily through inhalation of aerosols generated during cutting, scrubbing or cleaning, cooking or boiling, and drying. Reactions can also occur through the skin as a result of direct handling of the seafood itself. Occupational exposure to seafood allergens occurs mainly in the food and fishing industry. Workers in several of these industries are exposed to seafood, especially those involved in either manual or automated processing of crabs, prawns, mussels, fish, and fishmeal. Other occupations associated with exposure to seafood include oyster shuckers, laboratory technicians and researchers, jewellery polishers, restaurant chefs, fishmongers, and fishermen.

Treatment For Shellfish Allergy

Attack on Asthma ft. Haokai’s Birthday

Allergy to shellfish is usually not outgrown and persistent throughout life. The first line of treatment is thus strict avoidance of shellfish. A major part of this includes avoidance of foods that can potentially be cross-contaminated with shellfish. For example, grocery stores or restaurants where foods can contain unexpected derivatives of shellfish, like in stocks or oils used to prepare the foods. It is important to always ask the person preparing the food if there is risk of hidden exposure. Those with food allergies should also always carry self-injectable epinephrine to treat serious reactions from accidental exposures.

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Include These Six Food Items In Your Kid’s Menu To Keep Asthma At Bay

Arachidonic acid, a polyunsaturated omega 6 fatty acid, that usually comes from the dietary animal sources can cause asthma. Those who suffer from asthma shouldn’t use chlorinated water. They should also cut down their intake of tea, coffee, chocolates, nuts, salt, and sugar. The chemicals contained in processed food may cause allergic reactions for asthmatic people. Peanuts, sour fruits, food colourants, and fizzy drinks, and unhealthy snacks, too, can cause allergy and asthma. Asthma patients should stay away from food containing tartrazine, benzoate, sulphur di oxide and sulphate.

Including onions and garlic generously in your diet may keep away certain enzymes. Try to avoid food that may cause swelling on the mucus membranes.

Consuming soups, with a good amount of pepper in it, helps to strengthen the membranes in the respiratory system and makes the respiration easier.

Asthma is also caused when the digestive juices in the stomach get reduced. A medical check-up could confirm this.

It has been observed that consuming lemon juice mixed with water, before the meals, help to ease asthma.

Consuming ginger tea or shallots juice mixed with honey are effective remedies for asthma. Deficiency of vitamin B 6 may cause asthma attacks in some people.

Magnesium helps to maintain the health of the respiratory organs and allows the smooth expansion of it. Fruits and almost all the vegetables are rich sources of magnesium.

Spinachshallotsgarlic soup

½ cup spinach

½ cup shallots

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Aeroallergen Exposure Monitoring Data

HSEs laboratory had developed an immunoassay for measuring airborne levels of shellfish muscle protein in the early 2000s. This assay was very broadly cross-reactive across the common edible crustacean species. In 2015, HSE produced its own antiserum against purified shrimp TM and developed a polyclonal sandwich immunoassay. This TM-specific assay showed that the earlier shellfish muscle protein assay was largely measuring TM the specific TM assay giving results that were generally 20% lower than the old assay. In 2017, HSE purified PARV from North Atlantic salmon, raised polyclonal antisera against it and developed a non-competitive, sandwich immunoassay . This salmon PARV assay also shows good cross-reactivity with rainbow and brown trout, but not other fish species tested. The analytical limit of detection for the assays approximates to an airborne concentration of approximately 0.4 and 2 ng m3 for full-shift sampling at 2 l min1 for TM and salmon PARV, respectively.

Where concentrations of allergen measured in extracts of the filters were at, or below, the assays limit of detection , a notional airborne exposure was calculated using a value of half the analytical LOD adjusted for the air volumes sampled. The shellfish results were brigaded into work task categories based on the information supplied with individual air samples.


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