17/07/2024
【魚類過敏可以食魚？】魚類過敏是常見的食物過敏，當中許多人傾向戒吃所有魚類。中大醫學院一項研究發現，其實四成患者不會對特定魚類過敏。
研究團隊透過收集參加者對不同魚類的特異性IgE濃度（一種與過敏相關的抗體），及了解他們的病歷，分析他們對各種魚類的相對耐受性，並根據不同魚類所含的小清蛋白水平，從而建立了一套「魚類過敏階梯」系統。團隊發現，鰂魚、鯰魚（又名「塘虱」）和鯇魚的致敏度最高，其次是石斑和鯡魚，最低致敏度的則是鱈魚、大比目魚、三文魚和吞拿魚。此外，研究亦發現接近半數魚過敏參加者因認為蝦、蟹、蜆和帶子等甲殼類或貝類與魚類同屬海鮮，誤以為同樣需要一刀切戒口不吃，但其實當中三分之一參加者並沒有對這些甲殼類或貝類過敏。
魚類含有豐富營養，包括蛋白質和Omega3等均對兒童的成長至關重要。「魚類過敏階梯」系統有利專家為魚過敏兒童作更準確的診斷，助他們重新進食致敏度較低的魚類，以免患者不必要地戒口。詳細研究結果已於國際期刊《The Journal of Allergy and Clinical Immunology: In Practice》發表。
詳情: https://bit.ly/464hYrG
研究全文: https://bit.ly/3zTczYr
【Fish-allergic patients may be able to eat fish】Fish allergy is a common food allergy, with patients tending to avoid all kinds of fish. A study conducted by CU Medicine found that 40% of fish-allergic individuals reported tolerance of at least one type of fish, related to the level of β-parvalbumin, a kind of protein in the fish’s flesh.
Through the analysis of different fish-specific IgE levels, an allergy-associated antibody, and their clinical history, the team identified a “fish allergenicity ladder” system based on the clinical tolerance to different fish. They found that tilapia, catfish and grass carp had the highest degree of allergenicity, followed by grouper and herring with an intermediate degree of allergenicity, and then by cod, halibut, salmon and tuna with the lowest degree of allergenicity. The team also found that almost half of the fish-allergic individuals avoided all types of shellfish, such as shrimp, crab, clam and scallop, due to the mistaken belief that they are allergic to both, 33% of them lacked shellfish sensitisation.
Fish is a highly nutritious food; it contains crucial nutrients such as protein and omega-3s that are essential for the growth of children. The allergenicity ladder system provides allergists with a significant reference to minimise the risk of adverse reactions during oral food challenges for fish allergy diagnosis, by choosing fish with lower level of β-parvalbumin to start the test. These findings promote personalised seafood avoidance based on the evidence from allergy tests. Study details have been published in The Journal of Allergy and Clinical Immunology: In Practice.
Details: https://bit.ly/467JAwf
Full article of the study: https://bit.ly/3zTczYr
