BACKGROUND: Recently, the prevalence of food allergies during childhood is increasing, with fruits being common allergens. However, data on allergens that cause fruit and vegetable allergies and pollen-food allergy syndrome (PFAS) in childhood are relatively few. This study aimed to examine the allergens in fruit and vegetable allergies in pediatric patients and to determine the association between fruit and vegetable allergies and PFAS.OBJECTIVE: This study aimed to examine the current status of fruit and vegetable allergies in Japanese children.METHODS: This was a multicenter case series observational study. The participants included children aged <15 years who developed allergic symptoms after eating fruits and vegetables and subsequently received treatment in the Pediatric Department of 6 hospitals in the Osaka Prefecture in Japan during the study period from August 2016 to July 2017. Participants' information was obtained using a questionnaire, and data were obtained by performing several types of allergy tests using blood samples.RESULTS: A total of 97 children (median age, 9 years; 56 males) were included in the study. Apple was the most common allergen, followed by peach, kiwi, cantaloupe, and watermelon. A total of 74 participants (76%) exhibited allergic symptoms due to PFAS; moreover, pathogenesis-related protein-10 (PR-10) was the most common allergen superfamily. On the contrary, in the group where neither PR-10 nor profilin was sensitized, kiwi and banana were the most common allergens, and the age of onset was lower than that in the PFAS group. Specific antibody titer was significantly associated with Birch for Bet v1 and latex for Bet v2 (r = 0.99 and r = 0.89).CONCLUSION: When we examine patients with fruit and vegetable allergies, we should first consider PFAS even in childhood specifically for children greater than 4 years old.
Age of Onset ; Allergens ; Asian Continental Ancestry Group ; Betula ; Child ; Citrullus ; Clinical Study ; Cucumis melo ; Eating ; Food Hypersensitivity ; Fruit ; Humans ; Hypersensitivity ; Japan ; Latex ; Musa ; Observational Study ; Prevalence ; Profilins ; Prunus persica ; Rhinitis ; Rhinitis, Allergic, Seasonal ; Vegetables

Coronavirus disease 2019 (COVID-19) has spread rapidly in Japan. The purpose of this study was to report the clinical experience of our COVID-19 patients early in the pandemic and lessons from our experience. An outpatient fever clinic was established on April 7. Admission of COVID-19 patients was started on July 23. Between April 7 and September 30, there were 364 walk-in outpatients and emergency patients with fever. Polymerase chain reaction test for SARS-CoV-2 RNA or COVID-19 antigen test were performed in all patients, and all results were negative. Twenty patients with COVID-19 were admitted to a newly established dedicated COVID-19 ward. They were discharged well. There were no cases of nosocomial infection at our hospital. Length of hospitalization was correlated with serum ferritin level at admission, serum CRP level at admission, and age. More than half the patients experienced psychological stress, and COVID-19 specialized nurses experienced some stress. It is essential to set up the medical system for COVID-19 according to the trends of the disease. Creation of our original database and our “problem notebook” were useful for treatment and care of COVID-19 patients as well as for mental care of nurses.