Rice allergy

Rice allergy is a type of food allergy. People allergic to rice react to some rice proteins after they eat rice or breathe in rice steam. Although some reactions might lead to severe health problems, doctors can diagnose rice allergy with many methods and help allergic people to avoid reactions.

Symptoms

Some rice proteins are regarded as the causes of allergy in people.[1][2] People allergic to rice might have sneezing, runny nose, itching, asthma, stomachache or eczema after they eat rice.[2][3][4][5] Besides eating rice, people with a rice allergy can have reactions breathing rice steam from cooked rice. Allergic people might have skin rashes and swellings. Moreover, they might stop breathing and die due to their stopped heart.[6][7][8]

Diagnosis

People suspected of having a rice allergy can try diet avoidance on their own. First, they have to avoid rice for a couple of weeks. If they don’t have symptoms in the avoidance period but have those when exposed to rice, they are most likely allergic to rice.[9]

Specific rice IgE, a kind of antibody in human blood, will rise significantly when people are allergic to rice. A blood test shows the level of the antibody.[10]

Skin prick test, the most efficient diagnosis, shows the reactions in a short period. After being pricked in their skin with some rice mixture, allergic people will get itching and swelling in about 30 minutes.[11]

Treatment

Some symptoms might weaken if people get allergy shots. After getting several treatments for a long time, some allergic people will not have reactions afterwards.[12]

Some reactions have been eased by replacing original rice with genetically modified rice. This is regarded as a new choice for rice allergic people.[2][13]

Reactions might lessen by staying away from rice long-term.[3]

Prevalence

Unlike other food allergies, rice allergy is relatively uncommon.[4] It has been reported worldwide but mostly in China, Japan or Korea.[13][14] Because rice is a major food in Asia, people from Asia are exposed to higher allergy risk than people from other areas.[15]

References

  1. ↑ YH Jeon, et al, "Identification of major rice allergen and their clinical significance in children,"Korean J Pediatric 54, no. 10 (2011): 414.
  2. 1 2 3 Yuko Ogo, et al, "Generation of transgenic rice with reduced content of major and novel high molecular weight allergens," Rice 7, no. 1(2014): 19.
  3. 1 2 B. Wüthrich, T. Scheitlin and B. Ballmer-Weber, "Isolated allergy to rice," Allergy 57, no. 3(2002): 264.
  4. 1 2 Mitsuhiko Nambu, Noriaki Shintaku and Shigeru Ohta, "Rice Allergy," Pediatrics 117, no. 6 (June, 2006): 2331.
  5. ↑ Richard Lockey, "Food Allergy," World Allergy Organization, accessed February 29, 2016, http://www.worldallergy.org/public/allergic_diseases_center/foodallergy/.
  6. ↑ Raj Kumar, et al, "Rice (Oryza sativa) allergy in rhinitis and asthma patients: A clinico-immunological study," Immunobiology 212, no. 2 (2007): 142.
  7. ↑ F. Orhan and B. E.Sekerel, "A case of isolated rice allergy," Allergy 58, no.5(2003): 457.
  8. ↑ Alessandro Fiocchi, et al, "Anaphylaxis to rice by inhalation," Journal of Allergy and Clinical Immunology 111, no. 1 (2003): 193.
  9. ↑ Food Allergy Research & Education, "Food Elimination Diet," Food Allergy Research & Education, accessed March 3, 2016, http://www.foodallergy.org/diagnosis-and-testing/food-elimination-diet.
  10. ↑ Food Allergy Research & Education, "Blood Tests," Food Allergy Research & Education, accessed March 3, 2016, http://www.foodallergy.org/diagnosis-and-testing/blood-tests.
  11. ↑ Food Allergy Research & Education ,"Skin Prick Tests," Food Allergy Research & Education, accessed March 3, 2016, https://www.foodallergy.org/diagnosis-and-testing/skin-tests.
  12. ↑ American Academy of Allergy, Asthma & Immunology, "ALLERGY SHOTS (IMMUNOTHERAPY)," American Academy of Allergy, Asthma & Immunology, accessed February 16, 2016, https://www.aaaai.org/conditions-and-treatments/treatments/allergy-shots-(immunotherapy).aspx.
  13. 1 2 YH. Jeon, et al, "A Study for Allergenicity and Cross-reactivity of Rice," Journal of Allergy and Clinical Immunology 123, no. 2(February 2009): S190.
  14. ↑ Caroline Hadley, "Food allergies on the rise? Determining the prevalence of food allergies, and how quickly it is increasing, is the first step in tackling the problem," EMBO Report 7, no. 11 (2006): 1082.
  15. ↑ YH Jeon, et al, "Identification of major rice allergen and their clinical significance in children," Korean J Pediatric 54, no. 10 (2011): 419.
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