Search

Background: Allergic rhinitis (AR) is a highly prevalent disease. We aimed to assess the symptoms that physicians who see patients with AR perceive as the most bothersome in their patients. Methods: We performed a cross-sectional study based on an online questionnaire sent to all members of the Allergic Rhinitis and its Impact on Asthma (ARIA) initiative. The survey included questions on the physicians' perceptions of patients’ AR symptoms as well as of their own AR symptoms. Results: Among 401 respondents, 155 (38.7%) reported having AR. ARIA members reported nasal symptoms to be the most frequent (89.7%) and bothersome (80.0%) symptoms experienced by themselves. Likewise, nasal symptoms were reported by ARIA members as the most frequent (94.8% in members with AR vs 96.0% in members without AR) and bothersome (57.0% in members with AR vs 67.9% in members without AR) in their patients. We found a significant association (p = 0.001) between physicians’ own symptoms and those perceived as the most bothersome in their patients. Conclusion: Physicians perceive nasal symptoms to be the most frequent and the most bothersome symptoms in AR patients. The physicians' personal experiences with AR may influence their perception of patients’ symptoms.

Background: The use of artificial intelligence (AI) in scientific writing is rapidly increasing, raising concerns about authorship identification, content quality, and writing efficiency. Objectives: This study investigates the real-world impact of ChatGPT, a large language model, on those aspects in a simulated publication scenario. Methods: Forty-eight individuals representing 3 medical expertise levels (medical students, residents, and experts in allergy or dermatology) evaluated 3 blinded versions of an atopic dermatitis case report: one each human written (HUM), AI generated (AI), and combined written (COM). The survey assessed authorship, ranked their preference, and graded 13 quality criteria for each text. Time taken to generate each manuscript was also recorded. Results: Authorship identification accuracy mirrored the odds at 33%. Expert participants (50.9%) demonstrated significantly higher accuracy compared to residents (27.7%) and students (19.6%, P < .001). Participants favored AI-assisted versions (AI and COM) over HUM (P < .001), with COM receiving the highest quality scores. COM and AI achieved 83.8% and 84.3% reduction in writing time, respectively, compared to HUM, while showing 13.9% (P < .001) and 11.1% improvement in quality (P < .001), respectively. However, experts assigned the lowest score for the references of the AI manuscript, potentially hindering its publication. Conclusion: AI can deceptively mimic human writing, particularly for less experienced readers. Although AI-assisted writing is appealing and offers significant time savings, human oversight remains crucial to ensure accuracy, ethical considerations, and optimal quality. These findings underscore the need for transparency in AI use and highlight the potential of human-AI collaboration in the future of scientific writing.

Abstract Introduction The integrated care pathways for atopic dermatitis (AD‐ICPs) aim to bridge the gap between existing AD treatment evidence‐based guidelines and expert opinion based on daily practice by offering a structured multidisciplinary plan for patient management of AD. ICPs have the potential to enhance guideline recommendations by combining interventions and aspects from different guidelines, integrating quality assurance, and describing co‐ordination of care. Most importantly, patients can enter the ICPs at any level depending on AD severity, resources available in their country, and economic factors such as differences in insurance reimbursement systems. Methods The GA2LEN ADCARE network and partners as well as all stakeholders, abbreviated as the AD‐ICPs working group, were involved in the discussion and preparation of the AD ICPs during a series of subgroup workshops and meetings in years 2020 and 2021, after which the document was circulated within all GAL2EN ADCARE centres. Results The AD‐ICPs outline the diagnostic procedures, possible co‐morbidities, different available treatment options including differential approaches for the pediatric population, and the role of the pharmacists and other stakeholders, as well as remaining unmet needs in the management of AD. Conclusion The AD‐ICPs provide a multidisciplinary plan for improved diagnosis, treatment, and patient feedback in AD management, as well as addressing critical unmet needs, including improved access to care, training specialists, implementation of educational programs, assessment on the impact of climate change, and fostering a personalised treatment approach. By focusing on these key areas, the initiative aims to pave the way for a brighter future in the management of AD.

An outbreak of coronavirus disease 2019 (COVID-19) caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) started in Wuhan, Hubei Province, China and quickly spread around the world. Current evidence is contradictory on the association of asthma with COVID-19 and associated severe outcomes. Type 2 inflammation may reduce the risk for severe COVID-19. Whether asthma diagnosis may be a risk factor for severe COVID-19, especially for those with severe disease or non-allergic phenotypes, deserves further attention and clarification. In addition, COVID-19 does not appear to provoke asthma exacerbations, and asthma therapeutics should be continued for patients with exposure to COVID-19. Changes in the intensity of pollinization, an earlier start and extension of the pollinating season, and the increase in production and allergenicity of pollen are known direct effects that air pollution has on physical, chemical, and biological properties of the pollen grains. They are influenced and triggered by meteorological variables that could partially explain the effect on COVID-19. SARS-CoV-2 is capable of persisting in the environment and can be transported by bioaerosols which can further influence its transmission rate and seasonality. The COVID-19 pandemic has changed the behavior of adults and children globally. A general trend during the pandemic has been human isolation indoors due to school lockdowns and loss of job or implementation of virtual work at home. A consequence of this behavior change would presumably be changes in indoor allergen exposures and reduction of inhaled outdoor allergens. Therefore, lockdowns during the pandemic might have improved some specific allergies, while worsening others, depending on the housing conditions.

Background: Newborn screening (NBS) for the early detection of inborn errors of immunity (IEI) has been implemented in a few countries. The objective of this study was to verify the situation and define obstacles to the implementation of NBS worldwide. Methods: A questionnaire was developed by the Inborn Errors of Immunity Committee of the World Allergy Organization (WAO) with 17 questions regarding NBS for IEI in the physician's workplace, NBS test type, problems hindering NBS implementation, reimbursement for IEI therapy, presence of a national IEI registry, referral centers, molecular diagnosis, hematopoietic stem cell transplantation centers, gene therapy, and immunoglobulin replacement therapy. The survey was sent by email once a week to doctors and others associated with WAO and the main immunology societies worldwide as a Google Form™ to be completed during September and October 2021. Results: Two hundred twenty-nine questionnaires were completed, of which 216 (94.3%) were completed by physicians. One hundred seventy-six (76.8%) physicians were both allergists and immunologists. The agreement between allergists/immunologists and non-allergists/non-immunologists for the question “Is there NBS for IEI in the country you work in?” was good (κ = 0,64: 95% CI 0.55–0.69). Ninety-eight (42.8%) participants were from Latin America, 35 (15.3%) from North America, 29 (12.6%) from Europe, 18 (7.9%) from Africa, 44 (19.2%) from Asia, and 5 (2.2%) from Oceania. More than half the participants (n = 124, 54.2%) regularly treated patients with IEI, followed by occasional treatment (n = 77, 33.6%), or never (n = 28, 12.2%). Of the respondents, 14.8% reported that their countries performed NBS for IEI, whereas 42.2% reported their countries did not. T-cell receptor excision circles was the most widely used technique in some countries, with 75 (59.9%) for the diagnosis of NBS for IEI, followed by combined use with kappa deleting-recombination excision circles. Only 13 participants (10.3%) underwent neonatal exon screening in their respective countries. Financial and technical issues were among the major obstacles to the implementation of NBS for IEI. Conclusions: This pilot study showed that few countries have implemented NBS for IEI, despite the presence of immunology referral centers and the availability of hematopoietic stem cell transplantation and intravenous immunoglobulin replacement therapy. The findings highlight the difficulties, mainly financial and technical, hindering wide application of NBS. Sharing experiences, technologies, and resources at the international level can help overcome these difficulties.

ABSTRACT Exposure to radon can impact human health. This is a nonsystematic review of articles written in English, Spanish, French, or Portuguese published in the last decade (2013-2023), using databases such as PubMed, Google Scholar, EMBASE, and SciELO. Search terms selected were radon, human health, respiratory diseases, children, and adults. After analyzing the titles and abstracts, the researchers initially identified 47 studies, which were subsequently reduced to 40 after excluding reviews, dissertations, theses, and case-control studies. The studies have shown that enclosed environments such as residences and workplaces have higher levels of radon than those outdoors. Moreover, radon is one of the leading causes of lung cancer, especially in nonsmokers. An association between exposure to radon and development of other lung diseases, such as asthma and COPD, was also observed. It is crucial to increase public awareness and implement governmental control measures to reduce radon exposure. It is essential to quantify radon levels in all types of buildings and train professionals to conduct such measurements according to proven efficacy standards. Health care professionals should also be informed about this threat and receive adequate training to deal with the effects of radon on human health.

Objective: The study aimed to conduct a systematic review of the literature to verify the association between exposure to pesticides and allergic diseases (asthma, allergic rhinitis, and atopic dermatitis) in children and adolescents. Method: A systematic review and meta-analysis were performed using the PRISMA method with the question “What is the association between exposure to pesticides and allergic diseases in children (asthma, allergic rhinitis, and atopic dermatitis)?” MEDLINE, EMBASE, SciELO, and Cochrane electronic databases were searched throughout the period in the literature up to September 2020. A total of 1296 studies were found, and 24 were selected. Results: Exposure to pesticides showed a two-fold greater risk of developing or exacerbating asthma in children and adolescents (odds ratio [OR] = 2.14 95% confidence interval [CI] 1.26-3.64, p < 0.01). There was no association between exposure to pesticides and the development of allergic rhinitis (OR = 2.73, 95% CI 0.13-57.8, p = 0.52) and atopic dermatitis (OR = 2.19, 95% CI 0.51-9.36, p = 0.29). Conclusions: Exposure to pesticides increases the risk of developing or exacerbating asthma in children and adolescents. There was no evidence of an association between exposure to pesticides and the development of allergic rhinitis and atopic dermatitis in children and adolescents, possibly due to the low number of studies found in this review.

Background: Hereditary angioedema (HAE) is an autosomal dominant disease characterized by recurrent episodes of subcutaneous or mucosal edema caused by excess bradykinin. The aim of the present study was to assess the knowledge of pediatricians about hereditary angioedema. Methods: An online survey with 12 HAE-related and 14 demographics-related questions was e-mailed to all pediatricians who were members of the Brazilian Society of Pediatrics (n = 17 145) once a week during the months of June and July 2021. The electronic questionnaire assessed clinical manifestations, diagnosis, and treatment of hereditary angioedema in children and adolescents. Results: Four hundred and fifty-five pediatricians responded to the questionnaire (2.6%), of whom 55 (12.1%) were board certified in Allergy and Immunology (A/I), while 400 (87.9%) were not (N-A/I). Three hundred and sixty-eight (80.9%) were female, 289 (55.7%) were under 50 years of age, 286 (62.9%) graduated from Medical School more than 10 years previously, 83 (18.2%) held an MSc/PhD degree, and 253 (55.6%) were living in the Southeast Region of Brazil. The median number of correct answers to the questions related to HAE among A/I was 7 out of 12 (58.3%), with median ranging from 4.5 to 8 correct answers, while for N-A/I it was 3 (25%), with median ranging from 2.5 to 4 correct answers (p

Hereditary angioedema (HAE) is a rare disorder that causes unpredictable and debilitating cutaneous and submucosal edema and can lead to death. HAE can impair patients' ability to perform daily activities, proportional to pain severity, with patients reporting lower productivity, missed time from work or school and potentially resulting in missed career and educational opportunities. Many patients with HAE experience a significant psychological burden, including anxiety and depression. Available treatment aims to prevent and/or treat HAE attacks as they occur, to reduce morbidity and mortality and, finally, to improve health-related quality of life. Two different validated specific angioedema instruments are available to assess patients' quality of life. The Angioedema Quality of Life Questionnaire (AE-QoL) examines diagnosed patients' quality of life but is not specific for HAE. The disease-specific questionnaire is the Hereditary Angioedema Quality of Life (HAE-QoL), and the first used for hereditary angioedema with C1 inhibitors (C1-INH) deficiency. These quality-of-life instruments are helpful to the HAE patients' assessment and to the development of better therapeutic strategies as clinical tools, as defined by international guidelines. Considering this context, this review was conducted to compare the effects of acute vs. long-term prophylaxis on HAE patients’ health-related quality of life. In addition, the prevalence of anxiety and depression among these individuals was also reviewed.

Abstract Objective: To determine the prevalence of allergic rhinitis and associated factors in adolescents and in their parents/guardians. Methods: A cross-sectional study, applying a standardized and validated written questionnaire. Adolescents (13–14 years old; n=1,058) and their parents/guardians (mean age=42.1 years old; n=896) living in the city of Uruguaiana, southern Brazil, responded to the Global Asthma Network standard questionnaires. Results: The prevalence of allergic rhinitis in adolescents was 28.0%, allergic rhinoconjunctivitis, 21.3%, and severe forms of allergic rhinitis, 7.8%. In the adults, the prevalence of allergic rhinitis was 31.7%. Some associated factors with allergic rhinitis in adolescents include low physical exercise (OR 2.16; 95%CI 1.15–4.05), having only one older sibling (OR 1.94; 95CI 1.01–3.72) and daily meat consumption (OR 7.43; 95% CI 1.53–36.11). In contrast, consuming sugar (OR 0.34; 95%CI 0.12–0.93) or olive oil (OR 0.33; 95%CI 0.13–0 .81) once or twice a week, and eating vegetables daily (OR 0.39; 95%CI 0.15–0.99) were considered factors negatively associated. In adults, exposure to fungi at home (OR 5.25; 95%CI 1.01–27.22) and consumption of meat once or twice a week (OR 46.45; 95CI 2.12–1020.71) were factors associated with the medical diagnosis of allergic rhinitis, while low education (OR 0.25; 95%CI 0.07–0.92) was found to be a factor negatively associated. Conclusions: The prevalence of allergic rhinitis in adolescents is high, as well as its medical diagnosis in adults living in Uruguaiana. Environmental factors, especially food habits, were associated with findings in both groups.

Objective: Identify associated factors for recurrent wheezing (RW) in male and female infants. Methods: Cross-sectional multicentric study using the standardized questionnaire from the Estudio Internacional sobre Sibilancias en Lactantes (EISL). The questionnaire was applied to parents of 9345 infants aged 12–15 months at the time of immunization/routine visits. Results: One thousand two hundred and sixty-one (13.5%) males and nine hundred sixty-three (10.3%) females have had RW (≥3 episodes), respectively (p10 colds episodes (OR = 3.46; IC 95% 2.35–5.07), air pollution (OR = 1.33; IC 95% 1.12–1.59), molds at home (OR = 1.23; IC 95% 1.03–1.47), Afro-descendants (OR = 1.42; IC 95% 1.20–1.69), bronchopneumonia (OR = 1.41; IC; 1.11–1.78), severe episodes of wheezing in the first year (OR = 1.56; IC 95% 1.29–1.89), treatment with bronchodilators (OR = 1.60; IC 95% 1.22–2,1) and treatment with oral corticosteroids (OR = 1,23; IC 95% 0.99–1,52). Associated factors for RW for females were passive smoking (OR = 1.24; IC 95% 1.01−1,51), parents diagnosed with asthma (OR = 1.32; IC 95% 1,08−1,62), parents with allergic rhinitis (OR = 1.26; IC 95% 1.04–1.53), daycare attendance (OR = 1.48; IC 95% 1.17−1,88), colds in the first 6 months of life (OR = 2.19; IC 95% 1.69–2.82), personal diagnosis of asthma (OR = 1.84; IC 95% 1.39–2.44), emergency room visits (OR = 1.78; IC 95% 1.44–2.21), nighttime symptoms (OR = 2.89; IC 95% 2.34–3.53) and updated immunization (OR = 0.62; IC 95% 0.41−0.96). Conclusion: There are differences in associated factors for RW between genders. Identification of these differences could be useful to the approach and management of RW between boys and girls.

ObjectiveTo assess the profile of allergist/immunologist (A/I) physicians in Brazil, the workplace, the access to diagnostic and therapeutic procedures, and the impact of the COVID-19 pandemic on professional practice.MethodsThis cross-sectional study was conducted as an online survey. All adhering members of the Brazilian Association of Allergy and Immunology (ASBAI) received a Google Forms tool by email. The questionnaire addressed sociodemographic and professional aspects of the Brazilian allergists/immunologists (A/I) daily routine. The information was analyzed by SPSS version 20.0.ResultsFour hundred and sixty members answered the questionnaire. Women were predominant among the responders (336; 73%), and the median age was 47 years (range, 27–82 years). Most participants worked in the private sector (437, 95%), whereas 256 (47%) worked in the public sector. Among the public sector employees, 210 (82%) reported having access to some diagnostic test for allergic diseases and inborn errors of immunity. Only 91 (35%) A/I physicians in the public system had access to allergen-specific immunotherapy, compared to 416 (95, 9%) of those in the private sector. Regarding biological drugs, 135 (52.7%) and 314 (71.9%) of the A/I physicians working in the public and private sector, respectively, reported access. Two hundred and eighty-three (61.6%) had at least a 50% reduction in the number of consultations, and 245 (56%) provided telemedicine care during the COVID-19 pandemic.ConclusionBrazilian A/I have incorporated the most recent advances in managing immunoallergic diseases into their clinical practice, but they still have little access to various diagnostic methods. Strategies to enable the presence of A/I in public health services should be discussed and implemented. The coronavirus pandemic has accelerated the incorporation of telemedicine as a viable and promising method of medical care and can expand access to the specialty.

Abstract Objective To verify the efficacy of short-term prophylaxis for vaginal or cesarean section childbirth with plasma-derived C1-inhibitor concentrate in pregnant women. They should have hereditary angioedema (HAE) and normal plasma C1-inhibitor. Methods Case report of pregnant women diagnosed with HAE with normal C1- inhibitor who had been treated with intravenous C1-inhibitor concentrate for prophylaxis of angioedema attacks when hospitalized for delivery. The exon 9 of the Factor 12 (F12) genotyping gene was performed by automatic sequencing in all patients. Results Three cases of pregnant women with HAE with normal serum level of C1- inhibitor are reported. The genetic test detected the presence of a pathogenic mutation in the F12 gene. Deliveries occurred uneventfully and patients had no HAE symptoms in the following 72 hours. Conclusion C1-inhibitor concentrate could be useful to prevent angioedema attacks during and after delivery.

Smoking is still the leading cause of illness and preventable death across the world. The financial cost of smoking is estimated at 1.4 billion USD per year around the world. The Report on Tobacco Control in the Region of The Americas aims to provide an overview of the current state of trends in the tobacco epidemic and the implementation of effective policies to combat it. This report presents updated and validated data about prevalence, tobacco-related mortality, and progress on adopting legislation and policies associated with the six known measures to stop smoking, MPOWER of the World Health Organization.

No abstract.

RESUMO Objetivo: Verificar a relação dos polimorfismos do gene do receptor de vitamina D (RVD) com sinais clínicos e níveis de vitamina D (VD) em asmáticos. Métodos: Estudo transversal com 77 crianças de 7 a 14 anos de um ambulatório especializado, divididas em 3 grupos: asmáticos, em uso de corticoide inalatório (ICS) por mais de um ano; asmáticos sem necessidade de ICS; não asmáticos e não alérgicos (de acordo com o International Study of Asthma and Allergies in Childhood - ISAAC. Foram avaliados: espirometria, testes alérgicos, presença do polimorfismo CDX2 do promotor do RVD por reação em cadeia da polimerase (PCR) e genotipagem de polimorfismos dos éxons 2 e 3 por PCR-SSCA (single-strand conformational analysis), imunoglobulina E (IgE) total e IgE específica para ácaros e gramíneas nos três grupos estudados. Níveis de 25-hidroxivitamina D foram dosados nos asmáticos. Resultados: A média de idade foi 10,8±2,2 anos, 57% masculinos, 38 asmáticos com ICS, 22 sem ICS e 17 não asmáticos. Rinite alérgica esteve presente em 90% dos asmáticos, polimorfismo CDX2 em 23% dos asmáticos e ausente nos controles (p=0,03). Menores níveis de volume expiratório forçado no primeiro segundo (VEF1%) foram observados nos asmáticos homozigotos para CDX2 (p=0,001). Variações nas sequências dos éxons 2 e 3 não foram relacionadas com a asma ou demais testes. Deficiência ou insuficiência de VD foi diagnosticada em 98% dos asmáticos. Não houve associação entre níveis de VD e polimorfismos genéticos dos éxons 2 e 3. Conclusões: Observou-se associação positiva entre polimorfismo CDX2 em homozigoze com asma e menores valores de VEF1%. O CDX2 pode modificar a interação celular do RVD com a vitamina, bem como pode estar associado com a asma e com a dificuldade de controle da doença.

ABSTRACT This review study aimed to determine the relationship between exposure to smoke from biomass burning in the Amazon rain forest and its implications on human health in that region in Brazil. A nonsystematic review was carried out by searching PubMed, Google Scholar, SciELO, and EMBASE databases for articles published between 2005 and 2021, either in Portuguese or in English, using the search terms “biomass burning” OR “Amazon” OR “burned” AND “human health.” The review showed that the negative health effects of exposure to smoke from biomass burning in the Amazon have been poorly studied in that region. There is an urgent need to identify effective public health interventions that can help improve the behavior of vulnerable populations exposed to smoke from biomass burning, reducing morbidity and mortality related to that exposure.

OBJETIVO: A prevalência de conjuntivite alérgica (CA) não foi estabelecida. Estimativas sugerem que alergias oculares afetam de 15 a 20% da população mundial, ainda que a maioria dos estudos epidemiológicos abranjam sintomas de alergia nasal e ocular e não sejam específicos a respeito da CA. O objetivo deste estudo foi verificar a prevalência de sintomas, comorbidades e o impacto da alergia ocular em adolescentes. MÉTODOS: Os adolescentes foram selecionados de uma amostra de escolas e preencheram, em sala de aula, um questionário previamente validado sobre os sintomas da CA. O seu diagnóstico foi considerado quando mais de três episódios de prurido ocular foram relatados nos últimos 12 meses. Sintomas relacionados, como lacrimejamento, fotofobia, sensação de corpo estranho, impacto sobre as atividades diárias e diagnóstico de conjuntivite alérgica, foram analisados. RESULTADOS: Foram obtidos questionários de 3.120 adolescentes (média de 13,3±1,1 ano). Nos últimos 12 meses, 1.592 (51%) adolescentes tiveram prurido ocular. O sintoma relacionado mais frequente foi lacrimejamento (74%), seguido de fotofobia (50,1%) e sensação de corpo estranho (37,1%). A prevalência de conjuntivite alérgica foi de 20,7%, afetando mais pessoas do sexo feminino do que do masculino (56,1% em comparação a 45,9%; p = 0,01). O risco de um adolescente com alergia ocular apresentar asma, rinite e eczema atópico foi (RC = 5,7; IC de 95%: 4,5 a 7,1); (RC = 3,6; IC de 95%: 3,0 a 4,3) e (RC = 2,6; IC de 95%: 2,0 a 3,5), respectivamente. Uma interferência grave nas atividades diárias foi relatada por 30,5%. CONCLUSÕES: Sintomas de alergia ocular são comuns, frequentemente relacionados a outras doenças alérgicas, e causam impacto sobre as atividades diárias de adolescentes.

Objective: The prevalence of allergic conjunctivitis (AC) has not been established. Estimates suggest that ocular allergies affect 15% to 20% of the worldwide population, yet most epidemiological studies encompass nasal and ocular allergy symptoms and have not been specific to AC. The aim of this study was to verify the prevalence of ocular allergy symptoms, co-morbidities, and their impact on adolescents. Methods: Adolescents were selected from a sample of schools, and completed in classrooms a previously validated questionnaire on symptoms of AC. AC diagnosis was considered when more than three episodes of ocular itching were reported in the past 12 months. Related symptoms such as tearing, photophobia, foreign body sensation, impact on daily activities, and diagnosis of AC were analyzed. Results: Questionnaires were obtained from 3,120 adolescents (mean age 13.3 ± 1.1 years). Ocular itching in the past 12 months occurred in 1,592 (51%). The most frequently associated symptom was tearing (74%), followed by photophobia (50.1%) and foreign body sensation (37.1%). The prevalence of AC was 20.7%, affecting more females than males (56.1% versus 45.9%; p = 0.01). The risks of an adolescent with ocular allergy to present asthma, rhinitis, and atopic eczema were (OR = 5.7; 95% CI: 4.5 to 7.1), (OR = 3.6; 95% CI: 3.0 to 4.3), and (OR = 2.6; 95% CI: 2.0 to 3.5), respectively. Severe interference in daily activities was reported by 30.5%. Conclusions: Symptoms of ocular allergy are common, frequently associated to other allergic diseases, and impact the daily activities of adolescents.

Objective: The prevalence of allergic conjunctivitis (AC) has not been established. Estimates suggest that ocular allergies affect 15% to 20% of the worldwide population, yet most epidemiological studies encompass nasal and ocular allergy symptoms and have not been specific to AC. The aim of this study was to verify the prevalence of ocular allergy symptoms, co-morbidities, and their impact on adolescents. Methods: Adolescents were selected from a sample of schools, and completed in classrooms a previously validated questionnaire on symptoms of AC. AC diagnosis was considered when more than three episodes of ocular itching were reported in the past 12 months. Related symptoms such as tearing, photophobia, foreign body sensation, impact on daily activities, and diagnosis of AC were analyzed. Results: Questionnaires were obtained from 3,120 adolescents (mean age 13.3 ± 1.1 years). Ocular itching in the past 12 months occurred in 1,592 (51%). The most frequently associated symptom was tearing (74%), followed by photophobia (50.1%) and foreign body sensation (37.1%). The prevalence of AC was 20.7%, affecting more females than males (56.1% versus 45.9%; p = 0.01). The risks of an adolescent with ocular allergy to present asthma, rhinitis, and atopic eczema were (OR = 5.7; 95% CI: 4.5 to 7.1), (OR = 3.6; 95% CI: 3.0 to 4.3), and (OR = 2.6; 95% CI: 2.0 to 3.5), respectively. Severe interference in daily activities was reported by 30.5%. Conclusions: Symptoms of ocular allergy are common, frequently associated to other allergic diseases, and impact the daily activities of adolescents. Resumo: Objetivo: A prevalência de conjuntivite alérgica (CA) não foi estabelecida. Estimativas sugerem que alergias oculares afetam de 15 a 20% da população mundial, ainda que a maioria dos estudos epidemiológicos abranjam sintomas de alergia nasal e ocular e não sejam específicos a respeito da CA. O objetivo deste estudo foi verificar a prevalência de sintomas, comorbidades e o impacto da alergia ocular em adolescentes. Métodos: Os adolescentes foram selecionados de uma amostra de escolas e preencheram, em sala de aula, um questionário previamente validado sobre os sintomas da CA. O seu diagnóstico foi considerado quando mais de três episódios de prurido ocular foram relatados nos últimos 12 meses. Sintomas relacionados, como lacrimejamento, fotofobia, sensação de corpo estranho, impacto sobre as atividades diárias e diagnóstico de conjuntivite alérgica, foram analisados. Resultados: Foram obtidos questionários de 3.120 adolescentes (média de 13,3 ± 1,1 ano). Nos últimos 12 meses, 1.592 (51%) adolescentes tiveram prurido ocular. O sintoma relacionado mais frequente foi lacrimejamento (74%), seguido de fotofobia (50,1%) e sensação de corpo estranho (37,1%). A prevalência de conjuntivite alérgica foi de 20,7%, afetando mais pessoas do sexo feminino do que do masculino (56,1% em comparação a 45,9%; p = 0,01). O risco de um adolescente com alergia ocular apresentar asma, rinite e eczema atópico foi (RC = 5,7; CI de 95%: 4,5 a 7,1); (RC = 3,6; CI de 95%: 3,0 a 4,3) e (RC = 2,6; CI de 95%: 2,0 a 3,5), respectivamente. Uma interferência grave nas atividades diárias foi relatada por 30,5%. Conclusões: Sintomas de alergia ocular são comuns, frequentemente relacionados a outras doenças alérgicas, e causam impacto sobre as atividades diárias de adolescentes. Keywords: Allergic conjunctivitis, Children, Epidemiology, Palavras-chave: Conjuntivite alérgica, Crianças, Epidemiologia