PMID- 34476918 OWN - NLM STAT- MEDLINE DCOM- 20220209 LR - 20220209 IS - 1578-1267 (Electronic) IS - 0301-0546 (Linking) VI - 49 IP - 5 DP - 2021 TI - Fish allergy tolerance 16 months after diagnosis. PG - 25-27 LID - 10.15586/aei.v49i5.313 [doi] AB - Fish allergy is generally thought to be persistent, and approximately 80% of patients with fish allergies do not develop tolerance even 10 years after diagnosis. There have been no reports of rapid tolerance development in patients with severe fish allergies. We report the development of tolerance 16 months after the diagnosis of fish allergies. A 13-month-old boy was diagnosed with rosefish allergy (Sebastes matsubarae) and Japanese jack mackerel allergy (Trachurus japonicus). To find out which species of fish he could consume safely, he underwent several oral food challenge (OFC) tests. It was determined that he could consume tuna, salmon, cod, sardine, chub mackerel (Scomber japonicus), and Japanese amberjack (Seriola quinqueradiata) without eliciting signs of allergy. He continued to eat the fish that did not produce allergic reactions three to four times a week. The titer of serum allergen-specific immunoglobulin E (IgE) to fish had decreased in a subsequent ImmunoCAP((R))-specific IgE blood test performed 16 months after the diagnosis of the rosefish allergy. Following this test result, he underwent OFCs with rosefish and Japanese jack mackerel, both of which turned out to be negative, and it was determined that he had developed tolerance to fish. In this case, the repeated OFCs were useful in identifying fish species that were safe for consumption. In addition, the decrease in allergen-specific IgE was useful in predicting the development of tolerance. We hypothesize that proactive consumption of available fish species may lead to this rapid induction of tolerance to fish allergens. FAU - Okamoto, Mitsuhiro AU - Okamoto M AD - Department of Pediatrics, Hyogo Prefectural Tamba Medical Center, Tamba, Japan; m-okamoto@hp.pref.hyogo.jp. FAU - Takafuji, Satoru AU - Takafuji S AD - Department of Pediatrics, Hyogo Prefectural Tamba Medical Center, Tamba, Japan. FAU - Inoue, Shintaro AU - Inoue S AD - Department of Pediatrics, Hyogo Prefectural Tamba Medical Center, Tamba, Japan. FAU - Tanaka, Yuya AU - Tanaka Y AD - Department of Allergy, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan. LA - eng PT - Journal Article DEP - 20210901 PL - Singapore TA - Allergol Immunopathol (Madr) JT - Allergologia et immunopathologia JID - 0370073 RN - 0 (Allergens) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Allergens MH - Animals MH - Fishes/immunology MH - *Food Hypersensitivity/diagnosis MH - Humans MH - Immunoglobulin E MH - Infant MH - Male MH - Skin Tests OTO - NOTNLM OT - Sebastes OT - Trachurus OT - food hypersensitivity OT - immunoglobulin E (IgE) OT - jack mackerel OT - oral food challenge OT - parvalbumin OT - rosefish EDAT- 2021/09/04 06:00 MHDA- 2022/02/10 06:00 CRDT- 2021/09/03 07:18 PHST- 2021/03/13 00:00 [received] PHST- 2021/07/14 00:00 [accepted] PHST- 2021/09/03 07:18 [entrez] PHST- 2021/09/04 06:00 [pubmed] PHST- 2022/02/10 06:00 [medline] AID - 10.15586/aei.v49i5.313 [doi] PST - epublish SO - Allergol Immunopathol (Madr). 2021 Sep 1;49(5):25-27. doi: 10.15586/aei.v49i5.313. eCollection 2021.