Cova da Beira is an interior central region of Portugal, with a population of 93 000 inhabitants. The first pollen counts performed in Portugal revealed the highest values of the country in this area. The aim of this study was to assess the aeroallergens sensitization in an allergic population, according to the age groups. In a 5 year period (1995)(1996)(1997)(1998)(1999)(2000) 1790 consecutive outpatients were observed for suspected allergic symptoms.We included in this study all the 557 paediatric (Յ 15 years old) observed patients (317 male (57 %) and 240 female (43 %) with an average age of 7.6 Յ 4.2 years old). They were divided in three age groups (Group I: Յ 5yr; Group II: 6-10yr; Group III: 11-15yr). 371 patients were submitted to skin prick tests to aeroallergens. 86.5 % of these patients were sensitised to at least one allergen extract. The most representative aeroallergens sensitization were grasses mixture (44.9 %), D. pteronyssinus (32.5 %), D. farinae (29.1 %), Olea europea (27.5 %), Parietaria judaica (23.4 %), cat dander (16.1 %), Artemisia vulgaris (17.6 %), Robinia pseudoacacia (12.2 %), Platanus acerifolia (11.4 %), Tilia cordata (11.4 %) moulds mixture (11.2 %), Plantago lanceolata (10.6 %), dog dander (10.4 %), and Pinus radiata (7.5 %).The sensitisation to indoor aeroallergens, was similar in all age groups and it was less important than that of pollens. The prevalence of sensitisation to grasses was the greatest in all ages and the house dust mites sensitization was the second most prevalent. The highest pollens counts in this region could explain the early sensitisation even in young children.Key words: Aeroallergens. Allergic sensitisation. House dust mite. Pollens. Moulds. RESUMENCova da Beira es una región interior del centro de Portugal con una población de 93.000 habitantes. Los primeros recuentos de polen realizados en Portugal revelaron que en esta zona se hallan los valores más elevados del país. El objetivo del presente estudio fue evaluar la sensibilización a los aeroalérgenos en una población alérgica según los grupos de edad. En un período de 5 años (1995)(1996)(1997)(1998)(1999)(2000) se observaron 1.790 pacientes ambulatorios consecutivos con posibles síntomas alérgicos.En el estudio incluimos a los 557 pacientes pediá-tricos (de Յ 15 años) observados (317 niños (57 %) y 240 niñas (43 %), con una edad media de 7,6 Յ 4,2 años). Se dividieron en tres grupos de edad (grupo I: Յ 5 años; grupo II: 6-10 años; grupo III: 11-15 años).Se sometieron 371 pacientes a pruebas cutáneas con aeroalérgenos. El 86,5 % de los mismos estaban sensibilizados como mínimo a un extracto de alergeno. Los alérgenos más significativos frente a los que se observó sensibilización fueron: mezcla de hierbas (11,4 %), Tilia cordata (11,4 %), mezcla de mohos (11,2 %), Plantago lanceolata (10,6 %), caspa de perro (10,4 %) y Pinus radiata (7,5 %). La sensibilización a los aeroalérgenos domésticos fue similar en todos los grupos de edad y menos importante que la de los pólenes. La prevalencia de la se...

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Anaphylaxis is an acute, potentially fatal, multi-organ allergic reac-tion. Our aim was to characterize the population with food induced anaphylaxis followed over a one-year period. Retrospective analysis of clinical files of patients with food anaphylaxis observed in our food allergy consultation during 2016. Sixty-two patients were included. In the pediatric group, the implicated allergens were cow's milk, egg and fish and in the adults' group, the commonest allergens were nuts and wheat. Allergy to shrimp affected equally children and adults. The most frequent symptoms were urticaria (85.5%), angioedema (64.5%) and dyspnea (62.9%). Cofactors were present in 32.6% of patients, mainly exercise. Asthma and/or rhinitis were the most frequent comorbidities. In accordance to other studies, milk and egg were the most implicated allergens in children. Anaphylaxis in adults reflects the Mediterranean sensitization pattern. Exercise was the most relevant cofactor.

Background: Chronic urticaria is associated with an immune dysregulation usually mediated by T lymphocytes. Recently, Th17 and Tc17 have been implicated in autoimmune diseases; however, their role in urticaria is not clear yet. Methods: For the study we recruited 20 patients [10 of them had autoreactive chronic spontaneous urticaria (positive autologous intradermal serum test response, ASST+), and the other 10 were nonautoreactive chronic spontaneous urticaria patients (ASST–)] and 17 healthy age- and gender-matched controls (HG). The frequency and functional activity of Th17/Tc17 and Th1/Tc1 cells were evaluated by flow cytometry and type 2 cytokine mRNA by real-time PCR. Results: Our results demonstrated a significant decrease in Th17 frequency in both chronic urticaria groups compared to HG; regarding the amount of IL-17, at the single cell level, it was reduced in ASST– compared to HG. Concerning the Th1 and Th17 cells producing IFN-γ, IL-2, and TNF-α, a lower frequency was noted in chronic urticaria patients compared to HG. In contrast, a significantly increased frequency of Tc1 cells producing these cytokines was noted in ASST+ compared to HG and ASST–. Also, the frequency of Tc17 cells producing TNF-α was increased in ASST+ compared to HG; however, with respect to the amount of TNF-α, at the single cell level, we found a decrease in ASST+ compared to HG. Regarding type 2 cytokine mRNA, a higher expression was verified in ASST+ compared to HG. Conclusion: Our data suggest a probable involvement of cytotoxic T cells, mainly the Tc1 and Tc17 subsets, in chronic urticaria, particularly in the ASST+ group.

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