Obesity impairs ciliary function and mucociliary clearance in the murine airway epithelium.

Obesity is a risk factor for increased morbidity and mortality in viral respiratory infection. Mucociliary clearance (MCC) in the airway is the primary host defense against viral infections. However, the impact of obesity on MCC is unclear, prompting this study. Using murine tracheal tissue culture and in vitro influenza A virus (IAV) infection models, we analyzed cilia-driven flow and ciliary beat frequency (CBF) in the airway epithelium to evaluate MCC. Short-term IAV infection increased cilia-driven flow and CBF in control mice, but not in high-fat diet-induced obese mice. Basal cilia-driven flow and CBF were also lower in obese mice than in control mice. Mechanistically, the increase of extracellular adenosine triphosphate (ATP) release during IAV infection, which was observed in the control mice, was abolished in the obese mice, although the addition of ATP increased cilia-driven flow and CBF both in control and obese mice to a similar extent. Additionally, RNA sequencing and reverse transcription-polymerase chain reaction revealed the downregulation of several cilia-related genes, including Dnah1, Dnal1, Armc4, and Ttc12 (the dynein-related genes); Ulk4 (the polychaete differentiation gene); Cep164 (the ciliogenesis and intraflagellar transport gene); Rsph4a, Cfap206, and Ppil6 (the radial spoke structure and assembly gene); and Drc3(the nexin-dynein regulatory complex genes) in obese murine tracheal tissues compared to their control levels. In conclusion, our studies demonstrate that obesity attenuates MCC under basal conditions and during IAV infection by downregulating the expression of cilia-related genes and suppressing the release of extracellular ATP, thereby increasing the susceptibility and severity of IAV infection.

Concerns about vaccines and vaccination behavior among Japanese budget travelers to India.

BACKGROUND: Low vaccination coverage among travelers poses a critical challenge to global health security. Indeed, public concerns regarding vaccines can lead to vaccine reluctance and refusal, but evidence about the impacts of concerns regarding vaccines on the uptake of travel vaccinations remains sparse. We examined the associations between concerns about vaccines and vaccination behavior among travelers. METHODS: Japanese travelers aged 18 years or older, who stayed at a guesthouse in New Delhi, India, were targeted (n = 153). We conducted cross-sectional surveys from August 23 to September 2, 2019, and from February 19 to March 5, 2020. We examined the associations of three concerns regarding vaccines (5-point scale)-serious side effects from vaccines, vaccine safety, and vaccine effectiveness-with the uptake of travel vaccinations. RESULTS: In total, 60 participants (39.2 %) had been vaccinated for this or a past trip. After adjusting for all potential confounding variables, concerns about serious side effects from vaccines and vaccine safety were negatively associated with the uptake of travel vaccinations. The ORs (95 % CIs) for 1-point increases in concerns about serious side effects from vaccines and vaccine safety were 0.72 (0.52, 0.99) and 0.71 (0.52, 0.96), respectively. Sensitivity analyses did not change the results substantially. CONCLUSIONS: Concerns about vaccine safety issues were negatively associated with the uptake of travel vaccinations among the participants, with no corresponding association observed for vaccine effectiveness. Addressing concerns about vaccine safety issues, rather than vaccine effectiveness may contribute to an increased uptake of travel vaccinations.

Multiple endocrine neoplasia type 1 with MEN1 variant of unknown significance, in a patient after the diagnosed of pancreatic neuroendocrine neoplasia.

Duodenopancreatic neuroendocrine neoplasia (DP-NEN) is in approximately 10% of cases of multiple endocrine neoplasia type 1 (MEN1). We encountered a case in which the onset of NEN led to suspicion and diagnosis of MEN1. Although genetic testing showed MEN1 variant of uncertain significance (VUS), we considered it pathological from the clinical course, promoting the provision of genetic counseling and screening for relatives. MEN1 has a variety of clinical manifestations, and DP-NENs are the second-most common manifestation after primary hyperparathyroidism (pHPT). It is important to assume that MEN1 is an underlying cause of NEN.

Inhibition of glutaminolysis alone and in combination with HDAC inhibitor has anti-myeloma therapeutic effects.

Aim: This study aimed to investigate drug candidates and their efficacy in treating refractory multiple myeloma (MM) despite significant therapeutic advances and the introduction of novel agents. Our study focused on how myeloma cells mediate the metabolic pathways essential for survival. Therefore, we examined the role of glutaminolysis in this process. Methods: We investigated the role of glutaminolysis in myeloma cell growth. In addition, we analyzed the ability of CB-839 (telaglenastat), a glutaminase (GLS) inhibitor, to suppress myeloma cell proliferation and enhance the sensitivity to histone deacetylase (HDAC) inhibitors. Results: Glutamate deprivation significantly reduced MM cell proliferation. We observed an upregulation of GLS1 expression in MM cell lines compared to that in normal controls. CB-839 inhibits MM cell proliferation in a dose-dependent manner, resulting in enhanced cytotoxicity. Additionally, intracellular α-ketoglutarate and nicotinamide adenine dinucleotide phosphate levels decreased after CB-839 administration. Combining panobinostat with CB-839 resulted in enhanced cytotoxicity and increased caspase 3/7 activity. Cells transfected with GLS shRNA exhibited reduced cell viability and elevated sub-G1 phase according to cell cycle analysis results. Compared to control cells, these cells also showed increased sensitivity to panobinostat. Conclusion: Glutaminolysis contributes to the viability of MM cells, and the GLS inhibitor CB-839 has been proven to be an effective treatment for enhancing the cytotoxic effect of HDAC inhibition. These results are clinically relevant and suggest that CB-839 is a potential therapeutic candidate for patients with MM.

Factors involved in picky eating in children with disabilities visiting outpatient clinics to receive feeding therapy.

This study aimed to clarify the factors influencing picky eating in children with disabilities based on the hypothesis that primary disease or oral function is involved in picky eating. The subjects were 242 children aged 3-6 years receiving outpatient feeding therapy at our clinic. The subjects' general and oral conditions and picky eating were assessed by their medical recodes. Resultingly, 79 children showed picky eating. Using logistic regression analysis, associated factors of picky eating were primary disease (p = .04), nutritional methods (p = .01), and oral hypersensitivity (p = .04). The relationship with the primary disease suggests the influence of the characteristics of the primary disease. The relationship with oral hypersensitivity may be attributed to avoiding certain sensations. Additionally, the study revealed that the subjects employed tube feeding to compensate for reduced nutritional intake due to picky eating. This study indicated that primary disease and nutritional method as general conditions and oral hypersensitivity as an oral function were possible factors for picky eating. Picky eating was found to occur at varying frequencies depending on the underlying primary disease, especially when the child struggled to tolerate different sensations experienced during meals.

Oral status of older adults receiving home medical care: A cross-sectional study.

AIM: This study examined the oral status and the presence of teeth requiring treatment among older adults receiving home medical care. METHODS: This cross-sectional study was conducted at a Japanese dental clinic specializing in geriatric treatment. We recruited older adults receiving home medical care in the community who had begun to receive domiciliary dental care. The Japanese version of the Oral Health Assessment Tool (OHAT-J), as well as the presence of teeth requiring extraction and the need for assistance in maintaining oral hygiene were used to evaluate the participants' oral health and its association with other items. RESULTS: Ninety-three participants (44 male and 49 female, median age: 87.0 years) were surveyed. The median OHAT-J score was 6. The duration since the previous dental visit was 23 months. Sixty-two (73.8%) of 84 participants with ≥1 natural tooth had severe caries or teeth with severe mobility that required extraction. Logistic analysis revealed that requiring assistance in maintaining oral hygiene, mild dementia, severe dementia, and depression were significantly associated with an OHAT score of ≥6. CONCLUSIONS: Older adults receiving home medical care had poor oral health, with approximately 70% of them requiring tooth extraction. The need for assistance in maintaining oral hygiene and poor mental status contribute to poor oral health. Geriatr Gerontol Int 2024; 24: 706-714.

Efficacy of sequential fecal-marker examination for evaluating gastrointestinal inflammation in solid food protein-induced enterocolitis syndrome.

BACKGROUND: Food protein-induced enterocolitis syndrome caused by solid foods (Solid-FPIES) is a non-immunoglobulin E-mediated allergic disease characterized by delayed gastrointestinal symptoms. An oral food challenge (OFC) test, although necessary, can be inconclusive in cases with mild symptoms. Moreover, limited diagnostic marker availability highlights the need for novel surrogate markers. We aimed to examine the efficacy of fecal hemoglobin (FHb), lactoferrin (FLf), and calprotectin (FCp) over time in evaluating gastrointestinal inflammation degree in Solid-FPIES. METHODS: This observational study included 40 patients and 42 episodes at Juntendo University Hospital and affiliated hospitals between October 2020 and March 2024 categorized into FPIES (12 patients with 11 egg yolk, 1 fish, and 1 soybean episodes), control (14 patients with 15 episodes), and remission (14 patients). Fecal tests were performed for 7 days following antigen exposure. The ratios of each value were divided by the baseline value and analyzed over time course. RESULTS: The FPIES group had significantly higher peak ratios of all fecal markers than the control group (p < 0.01). The median FHb, FLf, and FCp ratios were 3.25, 9.09, and 9.79 in the FPIES group and 1.08, 1.29, and 1.49 in the control group, respectively. In the remission group, several patients had fluctuating fecal markers despite negative OFC, and one patient was diagnosed with FPIES by OFC with increased load. Receiver operating characteristic curve analyses revealed high diagnostic performance for each fecal marker in FPIES. CONCLUSIONS: Sequential fecal marker examination proved valuable in diagnosing Solid-FPIES and evaluating the degree of gastrointestinal inflammation.

[Case Report of Occult Breast Cancer with Triple Negative Subtype].

A 61-year-old woman presented at a nearby clinic with a complaint of a mass in the right axilla. Initial imaging examinations, including mammography, ultrasonography, and breast MRI, did not reveal any obvious intramammary lesions, although a swollen lymph node was observed in the right axilla. Fine-needle aspiration cytology confirmed malignancy. Hence, a core needle biopsy was performed. The results indicated a suspected metastasis of invasive ductal carcinoma(ER-, PgR-, HER2-); however, the primary tumor could not be definitively determined. Despite an extensive whole-body examination, the primary tumor remained unidentified. Nonetheless, metastasis of occult breast cancer in the right axillary lymph node was postulated. Subsequent axillary dissection revealed metastases in only one lymph node. Taking the clinical findings into consideration, the patient was diagnosed with right occult breast cancer, and chemotherapy and radiotherapy were planned.

Radiological and histopathological features and treatment response by subtypes of interstitial pneumonia with autoimmune features: A prospective, multicentre cohort study.

BACKGROUND: Patients with idiopathic interstitial pneumonia (IIP) have a favourable prognosis when they have interstitial pneumonia with autoimmune features (IPAF). However, precise IPAF-related findings from high-resolution computed tomography (HRCT) and lung histopathological specimens and the treatment response have not been fully determined. Therefore, this study was conducted to evaluate the relationship between findings on HRCT or lung histopathological specimens and the progression of interstitial pneumonia in patients with IPAF. METHODS: This multicentre cohort study prospectively enrolled consecutive patients with IIP. At the diagnosis of IIP, we systematically evaluated 74 features suggestive of connective tissue diseases and followed them up. HRCT, lung specimens, serum antibodies, and the clinical course were also evaluated. RESULTS: Among 222 patients with IIP, 26 (11.7%) fulfilled the IPAF criteria. During a median observation period of 36 months, patients with IPAF showed better survival than those without IPAF (p = 0.034). While histopathological findings were not related to IPAF, nonspecific interstitial pneumonia (NSIP) with organizing pneumonia (OP) overlap was the most prevalent HRCT pattern (p < 0.001) and the consolidation opacity was the most common radiological finding in IPAF (p = 0.017). Furthermore, in patients with IPAF, the diagnosis of COP or NSIP with OP overlap was associated with a higher increase in %FVC in 1 year than in those with idiopathic pulmonary fibrosis, NSIP, or unclassifiable IIP (p = 0.002). CONCLUSIONS: This study shows the presence of consolidation opacity on HRCT and the diagnosis of COP or NSIP with OP overlap are associated with IPAF and its favourable treatment response in patients with IPAF.

Empowering Community Health Workers in Japan: Determinants of Non-Communicable Disease Prevention Competency.

BACKGROUND: Community health workers (CHWs), hailing from the general populace, play a pivotal role in fortifying healthcare systems, with a primary focus on mitigating non-communicable diseases (NCDs) and elevating overall life expectancy. To assess the aptitude of CHWs in NCD prevention, we introduced the Community Health Workers Perceptual and Behavioral Competency Scale for preventing non-communicable diseases (COCS-N). This study examines the multifaceted interplay of individual and community factors that influence CHWs' COCS-N scores. METHODS: The research design is a secondary analysis using data from a self-administered questionnaire survey of 6480 CHWs residing in municipalities across Japan, which obtained 3120 valid responses, between September to November 2020. The COCS-N was employed as the dependent variable, while the independent variables were individual-related factors, including years of community health work, health literacy, and community-related factors, such as CHWs' sense of community. To ascertain the significance of associations between individual and community factors and CHWs' competency, an analysis of covariance (ANCOVA) was utilized to compare the three groups Q1/Q2/Q3 by low, medium, and high scores on the COCS-N scale. Statistical significance was considered to be indicated by a p-value of less than 0.05. RESULTS: The ANCOVA analysis revealed that three factors were significantly linked to CHWs' competence. These comprised individual factors: "years of CHWs" (mean ± SD Q1: 6.0 ± 6.0, Q2: 7.8 ± 7.0, Q3: 8.2 ± 7.7, p < 0.001) and "health literacy" (Q1: 27.7 ± 6.6, Q2: 30.4 ± 6.9, Q3: 33.8 ± 7.8, p < 0.001), as well as a community factor: "Sense of community" (Q1: 14.8 ± 3.7, Q2: 16.5 ± 3.5, Q3: 18.2 ± 3.6, p < 0.001). CONCLUSIONS: Our finding is that a positive association was derived between COCS-N scores and certain determinants. Notably, "years of CHWs" and "health literacy" in the individual domain, along with the "Sense of community" in the communal context, were firmly established as being significantly associated with CHWs' competency. Consequently, CHWs need training to increase their "health literacy" and "sense of community", to acquire high competency in NCD prevention, which will lead to the empowerment of CHWs and maintain their motivation to continue.

Soy isoflavone genistein attenuates the efficacy of immune checkpoint therapy in C57BL/6 mice inoculated with B16F1 melanoma and a high PD-L1 expression level reflects tumor resistance.

Immune checkpoint therapy has been shown to be an effective therapy for many types of tumors. Much attention has been paid to the development of an effector target would be helpful for immune checkpoint therapy. Genistein has been shown to have an anti-tumor effect both in vitro and in vivo. In this study, we examined the effect of genistein on immune checkpoint blockade therapy against B16F1 melanoma tumors. Mice treated with genistein or anti-programmed death (PD)-1 antibody showed a significant decrease in tumor growth. However, treatment with genistein had no effect on or attenuated the efficacy of immune checkpoint therapy. The percentages of T cell receptor (TCR)ß+CD4+ and TCRß+CD8+ cells and the concentrations of interferon-γ and tumor necrosis factor-α in tumor tissue were not different among the experimental groups. A significant difference was also not found in microbe composition. Interestingly, a high expression level of PD-ligand (L)1 closely reflected the outcome of therapy by genistein or anti-PD-1 antibody. The study showed that a combination of genistein treatment does not improve the effect of immune blockade therapy. It also showed that a high PD-L1 expression level in tumors is a good prediction maker for the outcome of tumor therapy.

Standardized 3D-CT lung volumes for patients with acute exacerbation of rheumatoid arthritis-associated interstitial lung disease.

OBJECTIVES: Fibrotic interstitial lung disease (ILD) is a progressive lung disease characterized by loss of lung volume, resulting in a leading cause of death in patients with RA. Crucially, acute exacerbation (AE) of ILD shows higher morbidity and mortality with rapid deterioration of the lungs. However, a quantitative assessment for physiological changes at AE has yet to be performed. This study hypothesized that quantitative assessments of lung volume (LV) accurately indicate disease severity and mortality risk in patients with AE-RA-ILD. METHODS: This multicentre cohorts study quantitatively assessed physiological changes of RA-ILD at diagnosis (n = 54), at AE (discovery-cohorts; n = 20, and validation-cohort; n = 33), and controls (n = 35) using 3D CT (3D-CT) images. LV was quantitatively measured using 3D-CT and standardized by predicted forced vital capacity. RESULTS: Patients with RA-ILD at diagnosis showed decreased LV, predominantly in lower lobes, compared with controls. Further substantial volume loss was found in upper- and lower lobes at AE compared with those at diagnosis. During AE, decreased standardized 3D-CT LV was associated with a worse prognosis in both cohorts. Subsequently, standardized 3D-CT LV was identified as a significant prognostic factor independent of age, sex and the presence of UIP pattern on CT by multivariate analyses. Notably, a composite model of age and standardized 3D-CT LV successfully classified mortality risk in patients with AE-RA-ILD. CONCLUSION: Volume loss at AE in patients with RA-ILD was associated with increased mortality. Assessing physiological change using standardized 3D-CT might help evaluate disease severity and mortality risk in patients with AE-RA-ILD.

Determinants of Self-Rated Health Disparities among Independent Community-Dwelling Older Adults: An Age-Stratified Analysis.

In response to the distinctive healthcare requirements of independent, healthy, community-dwelling older adults in Japan and other developed countries with aging populations, the current study examined the differences in factors associated with self-rated health (SRH) between the following two age groups: young-old (65-74) and old-old (75 and above). Age-stratified analysis was used to provide a comprehensive understanding of the unique health challenges faced by these demographic segments and to inform the development of targeted interventions and health policies to improve their well-being. The results of a cross-sectional study of 846 older adults in Yokohama, Japan, who completed self-administered questionnaires, revealed that high SRH was consistently linked with the low prevalence of concurrent medical issues in both age groups (<75 and ≥75) (ß: -0.323, p < 0.001 in the <75 group; ß: -0.232, p < 0.001 in the ≥75 group) and increased subjective well-being (ß: 0.357, p < 0.001 in the <75 group; ß: 0.244, p < 0.001 in the ≥75 group). Within the ≥75 age group, higher SRH was associated with more favorable economic status (ß: 0.164, p < 0.001) and increased engagement in social activities (ß: 0.117, p = 0.008), even after adjusting for age, sex, and economic status. These findings may inform the development of targeted interventions and policies to enhance the well-being of this growing population in Japan and other developed countries.

The Effects of Black Tea Consumption on Intestinal Microflora-A Randomized Single-Blind Parallel-Group, Placebo-Controlled Study.

We previously reported that black tea consumption for 12 wk reduced the risk of acute upper respiratory tract inflammation, and improved secretory capacity in individuals with low salivary SIgA levels (Tanaka Y et al. 2021. Jpn Pharmacol Ther 49: 273-288). These results suggested that habitual black tea consumption improves mucosal immunity. Therefore, in this study we evaluated the effect of black tea intake on gut microbiota, which is known to be involved in mucosal immunity, by analyzing the bacterial flora and the short-chain fatty acids (SCFAs) concentration of feces collected during the above clinical study. The clinical design was a randomized, single-blind, parallel-group, placebo-controlled study with 72 healthy Japanese adult males and females, who consumed three cups of black tea (Black Tea Polymerized Polyphenols 76.2 mg per day) or placebo per day for 12 wk. In all subjects intake of black tea significantly increased abundance of Prevotella and decreased fecal acetic acid concentration. Particularly in the subjects with low salivary SIgA levels, the change over time of total bacteria, Prevotella, and butyrate-producing bacteria, which are involved in normalizing immune function, were higher in the black tea group than in the placebo group. In subjects with low abundance of Flavonifractor plautii a butyrate-producing bacteria, black tea consumption significantly increased salivary SIgA concentration and the absolute number of Flavonifractor plautii. In conclusion, our results suggest that improvement of mucosal immunity via an increase in butyrate-producing bacteria in the gut may partly contribute to the suppressive effect of black tea consumption on acute upper respiratory tract inflammation observed in our previous report.

Proposal of a novel subspecies: Alicyclobacillus hesperidum subspecies aegles.

Alicyclobacillus sp. DSM 11985T was isolated from geothermal soil but had not yet been classified at the species level. The strain produced guaiacol, which is of interest from the viewpoint of food spoilage in the food industry. 16S rRNA gene sequence analysis revealed that strain DSM 11985T was closely related (99.6 % similarity) to Alicyclobacillus hesperidum DSM 12489T. However, strains of A. hesperidum did not produce guaiacol; therefore, we performed the taxonomic characterization of strain DSM 11985T. The results showed that strain DSM 11985T and strains of A. hesperidum showed different phenotypic characteristics in biochemical/physiological tests including guaiacol production. Average nucleotide identity values between strain DSM 11985T and strain DSM 12489T were 95.4-95.9 %, and the in silico DNA-DNA hybridization value using the Genome-to-Genome Distance Calculator between strains DSM 11985T and DSM 12489T was 65.5 %. These values showed that strain DSM 11985T was genetically closely related but separated from strains of A. heparidum. From the above results, a novel subspecies of A. hesperidum, named Alicyclobacillus hesperidum subsp. aegles subsp. nov. is proposed. The type strain is DSM 11985T (=FR-12T=NBRC 113041T).

Personal characteristics associated with handwashing behaviour among Japanese university students studying abroad: Prospective observational studies.

BACKGROUND: Hand hygiene is recommended to travellers to prevent common travel-related illnesses such as diarrhoea and respiratory infection. For effective hygiene promotion interventions, we aimed to identify the personal characteristics associated with handwashing behaviour. METHODS: Prospective observational studies consisting of pre- and post-travel surveys were conducted among Japanese university students studying abroad between 2016 and 2018 (n = 825; 6-38 travel days). Associations of age, sex, study major, and overseas travel experience with handwashing behaviour (5-point scale) were evaluated using ordinal logistic regression models, with adjustment for destination, travel duration, and psychological factors (risk perception of diarrhoea and concern about hygiene). RESULTS: Among the participants in our analysis (n = 629), 28.0 % washed their hands before every meal while abroad. The male sex and no overseas travel experience were associated with decreased frequency of infrequent handwashing, even after adjusting for all potential confounding factors, whereas the study major was not associated. The adjusted odds ratios (95 % confidence intervals) were 0.74 (0.56-0.99) for men vs. women and 0.69 (0.52-0.93) for no overseas travel experience vs. overseas travel experience but not to the current destination. CONCLUSIONS: The lack of overseas travel experience correlated with handwashing frequency in both men and women. In addition to the travel destination, the male sex and no overseas travel experience should be highlighted in pretravel hand hygiene interventions.

Intracranial Non-Sinus-Type Dural Arteriovenous Fistulas Could Be Curable by Transarterial Embolization or Transvenous Embolization with Liquid Embolic Material.

Objective: Recently, the occlusion rate of transarterial embolization (TAE) for intracranial non-sinus-type dural arteriovenous fistulas (NSDAVFs) has improved after ONYX was introduced. Additionally, when TAE for NSDAVF is unsuccessful, transvenous embolization (TVE) has become available as an alternative treatment. We investigated the factor for the favorable occlusion rate of endovascular treatment for NSDAVF at our institutions. Methods: Two hundred and twenty-seven patients with intracranial dural arteriovenous fistulas (DAVFs) were treated at our institutions between September 2014 and October 2022. The patients diagnosed with NSDAVF in all DAVFs who underwent endovascular treatment were included. The clinical characteristics, angiographical outcomes, and clinical outcomes of patients who underwent endovascular treatment were evaluated. Results: Thirty-eight patients had intracranial NSDAVF (tentorial: 23 cases, parasagittal-convexity: 7, anterior cranial fossa: 6, middle cranial fossa: 2). Our participants' mean age was 64.8 ± 11.3 years, and 31 (81.6%) of them were males. Patients' symptoms were as follows: asymptomatic (24), hemorrhage (10), tinnitus (3), and trigeminal neuralgia (1). TAE and TVE were performed on 35 and 3 patients, respectively. The rate of immediate angiographical occlusion was 84.2% (32/38). The follow-up angiographical occlusion rate in 6 months was 88.5% (31/35). Complications occurred in three cases. There was no morbidity or mortality after 30 days. Conclusion: TAE using the combination of the new microcatheter and microguidewire and TVE in the case of difficult or failed TAE for NSDAVF could achieve high success rates and safety.

Pediatric allergies in Japan: Coronavirus disease pandemic-related risk factors.

Background: The coronavirus disease 2019 (COVID-19) pandemic impacted various parts of society, including Japanese children with allergies. Objective: This study investigated risk factors for pediatric allergic diseases associated with the state of emergency owing to the COVID-19 pandemic in Japan, including during school closures. Methods: Parents of pediatric patients (0-15 years) with allergies were enrolled and queried regarding the impact of school closure on pediatric allergies compared to that before the COVID-19 pandemic. Results: A valid response was obtained from 2302 parents; 1740 of them had children with food allergies. Approximately 4% (62/1740) of the parents reported accidental food allergen ingestion was increased compared to that before the COVID-19 pandemic. Accidental ingestion during school closures was associated with increased contact with meals containing allergens meant for siblings or other members of the family at home. The exacerbation rate during the pandemic was highest for atopic dermatitis at 13% (127/976), followed by allergic rhinitis at 8% (58/697), and bronchial asthma at 4% (27/757). The main risk factors for worsening atopic dermatitis, allergic rhinitis, and bronchial asthma were contact dermatitis of the mask area (34/120 total comments); home allergens, such as mites, dogs, and cats (15/51 total comments); and seasonal changes (6/25 total comments), respectively. Conclusion: The main factors affecting allergic diseases were likely related to increased time at home, preventive measures against COVID-19, and refraining from doctor visits. Children with allergies were affected by changes in social conditions; however, some factors, such as preventing accidental ingestion and the management of allergens at home, were similar to those before the COVID-19 pandemic. Patients who had received instructions on allergen avoidance at home before the pandemic were able to manage their disease better even when their social conditions changed.