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Jefferson Adams posted an article in Additional Celiac Disease ConcernsCeliac.com 09/17/2018 - Her name is Hawkeye, she’s a black lab, and her mission is to detect gluten for a young man named Toby, who gets terribly sick if he eats food that contains gluten. Hawkeye is up to 98% accurate at detecting gluten with just a few sniffs. Hawkeye was also expensive, costing a princely $16,000, not including food, and vet bills. That may sound expensive, but, says Toby’s mom, Amy "when you think about it trainers are often training only one to two dogs at a time and our trainer, she only trained one dog at a time and it took a year.” In Toby’s case, the community rallied to raise the money to buy Hawkeye, who is a registered service dog, and so can accompany Toby nearly everywhere. Everyone loves Hawkeye and her role in Toby’s life. Amy calls Hawkeye a “life-giver, and says that Amy continued “she's breathed life and confidence into Toby that we haven't seen in a really long time." She adds that the family has “really seen just growth and development in him because he's not getting sick as often and he's now able to learn more. So he can now say his alphabet, learn his numbers and colors, things that just a year ago he wasn't doing." Gluten-sniffing dogs are rare, but their numbers are growing. The Mercola.com website says that Willow, a gluten-sniffing German shorthaired pointer in Michigan, can detect gluten with 95 percent to 98 percent accuracy. The website Nimasensor.com notes that “[g]luten-sniffing dogs may detect gluten in amounts as small as .0025 parts per million with 95 percent to 98 percent accuracy.” Love the idea of a gluten sniffing dog, but maybe daunted by the price, logistics or commitment? There are portable gluten sensors currently on the market, with greater accuracy than Hawkeye, for a few hundred dollars. Disclosure: Nima Labs is a paid advertiser for Celiac.com
Jefferson Adams posted an article in Celiac Disease Diagnosis, Testing & TreatmentCeliac.com 08/13/2012 - Research has indicated that giving small amounts of wheat-rich food to people with celiac disease, who are on a gluten-free diet, will trigger interferon (IFN)-γ-secreting T cells in the bloodstream. These T cells react to gluten, and can be easily detected. However, very little is known about how this procedure might be reproduced in the same patient groups that underwent two, or more, gluten challenges. A team of researchers recently set out to assess the reproducability of this short wheat challenge method for detecting immune an response to gluten. The research team included A. Camarca, G. Radano, R. Di Mase, G. Terrone, F. Maurano, S. Auricchio, R. Troncone, L. Greco, C. Gianfrani. They are affiliated with the Institute of Food Sciences-CNR, Avellino Department of Paediatrics and European Laboratory for the Investigation of Food-Induced Diseases, University of Naples, Naples, Italy. They evaluated fourteen celiac patients in remission who consumed wheat bread for 3 days, along with thirteen patients who underwent a second gluten challenge after 3-10 months on a strict gluten-free diet. The team then analyzed the immune reactivity to gluten in peripheral blood by detecting IFN-γ both before and 6 days after patients began a a gluten-inclusive diet. They found that gliadin-specific IFN-γ-secreting CD4(+) T cells increased significantly by day 6 of the first challenge. These cells arose as prevalently human leucocyte antigen (HLA)-DQ restricted and with a phenotype of gut homing, as suggested by the expression of β7-integrin. They also saw a reaction to gliadin after the second wheat consumption, although the responses varied by individual at each challenge. The study showed that a short wheat challenge offers a non-invasive approach to investigate the gluten-related immune response in peripheral blood of people who are sensitive to gluten. Moreover, the study showed that the procedure can be reproduced in the same subjects after a gluten wash-out of at least 3 months. The results of this study mean that we can likely expect this procedure to find its way into clinical practice in the future. Source: Clinical and Experimental Immunology. 2012 Aug;169(2):129-36. doi: 10.1111/j.1365-2249.2012.04597.x.
Scand J Gastroenterol. 2003 Jul;38(7):727-31. Effectiveness of the sorbitol H2 breath test in detecting histological damage among relatives of coeliacs. Tursi A, Brandimarte G, Giorgetti GM, Inchingolo celiac disease. Dept. of Emergency, L. Bonomo Hospital, Andria (BA), Italy. Celiac.com 08/07/2003 - An Italian study conducted by Dr. L. Bonomo and colleagues and published in the July 2003 edition of Scandinavian Journal of Gastroenterology concludes that A significant proportion of coeliacs may be missed if relatives are screened by serology only, while the efficacy of sorbitol H2-BT in screening relatives is confirmed. This study confirms that neither a breath test nor serology can replace intestinal biopsy, which remains the gold standard for the diagnosis of celiac disease, thus confirming the continued importance of performing biopsies for diagnosing celiac disease. The studys goal was to determine the diagnostic capabilities of serological tests (antigliadin (AGA), antiendomysium (EMA) and anti-tissue transglutaminase (anti-tTG)) and sorbitol H2 breath test (H2-BT) in the detection of celiac disease in first-degree relatives. The study screened 111 first-degree relatives of 37 celiac families using both test methods to determine candidates for small bowel biopsy. First-degree relatives with abnormal test results underwent a small bowel biopsy, as did those with negative serological and H2 breath test results who had clinical complaints or suspected that they may have celiac disease. The biopsy results were expressed using the Marsh classification system, and celiac disease was diagnosed in 49 of the 111 screened relatives of celiacs, or in 44.14%. A breakdown of the results is as follows: 5 showed Marsh IIIc, 8 Marsh IIIb, 16 Marsh IIIa, 13 Marsh II and 7 Marsh I lesions. 19 relatives showed the classical form of celiac disease, 20 showed the sub-clinical form, and 10 showed the silent form. The serological test results indicated an overall positivity of only 36.73%, with strong positive results only in those with severe intestinal damage and Marsh IIIb-c lesions. The sorbitol H2-BT breath test results showed an overall positivity of 83.67%, and showed strong positivity in patients with slight histological damage (Marsh I-IIIa).