Determinação da reatividade cutânea às quinolonas e fatores associados / Cutaneous hypersensitivity to quinolones and associated factors

Introdução: As quinolonas, amplamente usadas na prática clínica, correspondem à segunda causa de reações de hipersensibilidade aos antibióticos. Reações às quinolonas (RQ) são um desafio para o alergista, pois ocorrem por mecanismos IgE mediados, mas também por uma via não imunológica, o receptor MRGPRX2. Objetivo: Este trabalho avalia a reatividade cutânea de pessoas sem alergia ao ciprofloxacino em diversas concentrações. Metodologia: Foram realizados prick tests (PT) e testes intradérmicos de leitura imediata (ID) com ciprofloxacino em voluntários atendidos em um ambulatório de serviço terciário. No PT, foram usadas concentrações de 2 mg/mL (solução mãe), 1:10 e 1:50. No ID, 1:10, 1:50, 1:100 e 1:500. Resultados: Foram incluídos 31 indivíduos sem histórico de RQ. A média de idade foi de 40,5 anos, sendo 74,1% do gênero feminino. Doenças atópicas foram encontradas em 48,4% dos participantes, 100% destes com rinite alérgica, 20% com conjuntivite alérgica, 13,3% com asma, e 13,3% com dermatite atópica. Uso prévio de quinolonas foi relatado por 45,2% dos indivíduos. O PT puro e 1:10 foi positivo em 25,8% e 6,5%, respectivamente; na concentração 1:50 não mostrou positividade. O ID 1:10, 1:50 e 1:100 foi positivo em 96,8%, 45,2% e 6,5%, respectivamente, mas foi negativo na diluição 1:500. Nos que já usaram quinolonas, o PT puro e 1:50 foram positivos em 28,6% e 14,3% dos participantes, respectivamente, versus 25% e 0% nos que não usaram. O ID entre os indivíduos que já usaram foi positivo em 100% na diluição 1:10, 57,1% na 1:50, e 14,3% na 1:100. Entre os que não usaram, 93,7% na diluição 1:10, 37,6% na 1:50, e 0% na 1:100. Nos atópicos, o PT foi positivo em 26,7% e 13,3% na concentração mãe e 1:10; e negativo em 1:50. Nos participantes não atópicos, observou-se positividade de 25% no PT com a solução mãe e testes negativos nas demais diluições. O ID com as soluções 1:10, 1:50 e 1:100 foi positivo em 100%, 46,7% e 6,7% dos atópicos, e 93,7%, 43,7%, 6,3% nos não atópicos, respectivamente. Conclusão: O ciprofloxacino apresenta reatividade cutânea através de vias imunológicas e pelo MRGPRX2, sendo recomendada a realização de testes cutâneos em concentrações igual ou menores de 0,02 mg/ mL para investigação de reações de hipersensibilidade imediata, pois essas concentrações apresentam boa especificidade.

Introduction: Quinolones, widely used in clinical practice, are the second leading cause of antibiotic hypersensitivity. Hypersensitivity to quinolone poses a challenge for allergists, as it occurs through immunoglobulin E (IgE)-mediated mechanisms as well as nonimmunologic ones (specifically the MRGPRX2 receptor). Objective: To assess cutaneous hypersensitivity to ciprofloxacin at different concentrations. Methodology: Skin prick test (SPT) and immediate-reading intradermal test (IDT) with ciprofloxacin were performed on volunteers treated at a tertiary outpatient clinic. Concentrations of 2 mg/mL (main solution), 1:10, and 1:50 were used for the SPT, and concentrations of 1:10, 1:50, 1:100, and 1:500 were used for the IDT. Results: Thirty-one individuals with no history of hypersensitivity to quinolone were included, of whom 74.1% were women. Mean patient age was 40.5 years. Atopic diseases were found in 48.4% of participants, of whom 100% had allergic rhinitis, 20% had allergic conjunctivitis, 13.3% had asthma, and 13.3% had atopic dermatitis. Previous quinolone use was reported by 45.2%. SPT performed with the main solution and 1:10 dilution was positive in 25.8% and 6.5% of cases, respectively, whereas SPT with 1:50 dilution was negative in all cases. IDT performed with 1:10, 1:50, and 1:100 dilutions was positive in 96.8%, 45.2%, and 6.5% of cases, respectively, but negative with 1:500. Among the individuals who had used quinolones, SPT with main solution and 1:50 dilution was positive in 28.6% and 14.3% of cases, respectively, compared with 25% and 0% in those who had not used quinolones. Among those who had used quinolones, IDT results were positive in 100% at 1:10, 57.1% at 1:50, and 14.3% at 1:100. Among those who had not used quinolones, IDT results were positive in 93.7% at 1:10, 37.6% at 1:50, and 0% at 1:100. In atopic individuals, SPT was positive in 26.7% with the main solution and 1:10 dilution, and negative with 1:50. Among nonatopic individuals, 25% had a positive SPT with the main solution, and the remaining individuals were negative. IDT results with 1:10, 1:50, and 1:100 dilutions were positive, respectively, in 100%, 46.7%, and 6.7% of atopic individuals and in 93.7%, 43.7%, and 6.3% of nonatopic individuals. Conclusion: Ciprofloxacin triggers cutaneous hypersensitivity via immunologic mechanisms and the MRGPRX2 receptor. It is recommended that skin tests be performed at a dilution of 1:100 or greater to investigate immediate hypersensitivity.

[Reproducibilidad clínica de reacciones de hipersensibilidad a fármacos en pruebas de exposición controlada].

Objective: To assess the reproducibility of symptoms in drug challenge tests. Methods: The study included patients with positive cutaneous or challenge test throughout 2019. For each patient, clinical suspicion according to Karch-Lasagna algorithm was registered. Primary outcome was the reproducibility of symptoms in the provocation tests using a paired analysis of data with McNemar test. Results: Eighty-nine patients were included, 16 of them presented more than one positive test. Thirty were skin tests positive and 75 reacted to provocation tests. Eighty nine percent of patients who reacted in challenge test were probably or possibly reactors according to Karch-Lasagna scale. Symptoms of initial reaction did not differ from those triggered in challenge tests. Conclusions: Karch-Lasagna scale is useful in predicting the response to drug provocation tests. In most of the positive studies, results were suggested by clinical history and no differences were found between symptoms triggered in challenge test and that referred to in the previous reaction.

Objetivo: Evaluar la reproducibilidad de los síntomas en pruebas de exposición con fármacos. Métodos: Estudio retrospectivo, efectuado en pacientes con prueba cutánea o exposición positiva, atendidos en 2019. De cada paciente se registró la sospecha clínica según el algoritmo de Karch-Lasagna. El resultado principal fue la reproducibilidad de síntomas en las pruebas de exposición, mediante el análisis de datos emparejado con prueba de McNemar. Resultados: Se incluyeron 89 pacientes, y de estos 16 reportaron varias pruebas positivas. Se obtuvieron 30 pruebas cutáneas y 75 de exposición positivas. En el 89% de las pruebas de exposición positivas, las reacciones iniciales se clasificaron en probables o posibles, según la escala de Karch-Lasagna. Los síntomas reportados en la reacción inicial no difirieron de los de las pruebas de exposición. Conclusiones: La escala de Karch-Lasagna es un método útil para predecir la respuesta en las pruebas de exposición con fármacos. En la mayor parte de las pruebas positivas, los resultados fueron sugeridos por la historia clínica, sin diferencias entre la manifestación de síntomas en la prueba de exposición versus los referidos en la reacción inicial.

[Skin test (Skin Prick Test) in food allergy]. / Pruebas cutáneas (Skin Prick Test) en alergia alimentaria.

Skin tests, also known as prick tests, in food allergies are restricted to IgE-mediated food allergies, with results that barely indicate sensitization to a certain food and do not necessarily suggest food allergy. The clinical context of the patient is the decisive point before performing any type of food allergy skin test; Contextualizing and relating the patient's clinical picture with the immunological mechanism of IgE-mediated allergies will allow a better selection of the allergy test for each case. Positive tests should be interpreted more carefully, and consider that during early childhood it is common that several patients may have negative specific serum IgE tests in the blood for food allergens compared to those performed on the skin, which are positive. Skin testing can be carried out with standardized strata of foods, but they are not always available for all foods and some are very unstable. Skin tests can even be performed with raw foods, using the prick to prick technique to perform the puncture with fresh foods (especially fruits or vegetables) or other products that are not commercially available. The skin prick test is a test where, after having placed the allergenic extract in drops or with fresh food itself, the puncture must be carried out with a standardized lancet.

Las pruebas cutáneas, también conocidas como prick test, en alergia alimentaria están restrictas a las alergias a alimentos mediadas por IgE, con resultados que apenas indican sensibilización a cierto alimento y no necesariamente sugieren alergia alimentaria. El contexto clínico del paciente es el punto decisivo antes de realizar cualquier tipo de prueba cutánea de alergia a alimentos; contextualizar y relacionar el cuadro clínico del paciente con el mecanismo inmunológico de las alergias mediadas por IgE permitirá una mejor selección de la prueba de alergia para cada caso. Las pruebas positivas deben interpretarse con más cuidado, y considerar que durante la infancia precoz es común que varios pacientes pueden tener pruebas IgE séricas especificas negativas en sangre para alérgenos alimentarios comparadas con las realizadas en piel, que resultan positivas. La prueba cutánea puede llevarse a cabo con estratos estandarizados de alimentos, pero no siempre se encuentran disponibles para todos los alimentos y algunos son muy inestables. Incluso pueden realizarse pruebas cutáneas con alimentos in natura, mediante la técnica prick to prick para efectuar la punción con alimentos frescos (especialmente con frutas o vegetales) u otros productos que no estén disponibles comercialmente. El skin prick test es una prueba donde después de haber colocado el extracto alergénico en gotas o con el propio alimento fresco debe llevarse a cabo la punción con una lanceta estandarizada.

Evaluation of skin test indications for general anesthetics in real life: a prospective cohort study.

BACKGROUND: In daily practice, atopic patients and those who have other drug allergies are referred to allergy clinics for evaluation of possible general anesthetic allergy despite the fact that it is not recommended in recent guidelines. OBJECTIVE: The aim of this prospective study is to determine the negative predictive value of skin tests for common general anesthetic drugs prior to general anesthesia in atopic patients and in patients who had drug allergies by including the data of those who had previously tolerated or reacted to general anesthesia. METHODS: A database program was constituted to collect the preoperative skin test data of patients referred to our clinic between 2013 and 2018. Demographic and clinical history, medications implemented during perioperative period, reactions, and results of skin tests performed with anesthetic drugs and latex were evaluated. RESULTS: Four hundred fifty-nine out of the total 1167 patients referred fulfilled the inclusion criteria for further evaluation. Nearly 75% of the patients were female and mean age was 46.3 ±â€¯14.3 years. History of hypersensitivity reactions (HRs) due to NSAIDs and/or antibiotics, radiocontrast agents, local anesthetics, and food were present in the 53.1%, 4.1%, 1.5%, and 2.0%, respectively. The negative predictive values of skin tests for general anesthetics were in the range of 80-100%. Only 4 patients (0,87%) experienced HRs during operation. CONCLUSION: These real-life data reveal high rates of negative predictive value of skin tests with general anesthetic drugs and a low reaction rate in atopic patients and in patients with allergy to other drugs.

[Update on perioperative hypersensitivity reactions: joint document from the Brazilian Society of Anesthesiology (SBA) and Brazilian Association of Allergy and Immunology (ASBAI) - Part II: etiology and diagnosis]. / Atualização sobre reações de hipersensibilidade perioperatória: documento conjunto da Sociedade Brasileira de Anestesiologia (SBA) e Associação Brasileira de Alergia e Imunologia (ASBAI) ­ Parte II: etiologia e diagnóstico.

This second joint document, written by experts from the Brazilian Association of Allergy and Immunology (ASBAI) and Brazilian Society of Anesthesiology (SBA) concerned with perioperative anaphylaxis, aims to review the pathophysiological reaction mechanisms, triggering agents (in adults and children), and the approach for diagnosis during and after an episode of anaphylaxis. As anaphylaxis assessment is extensive, the identification of medications, antiseptics and other substances used at each setting, the comprehensive data documentation, and the use of standardized nomenclature are key points for obtaining more consistent epidemiological information on perioperative anaphylaxis.

Baked egg tolerance: is it possible to predict? / Tolerância aos alimentos assados com ovo: é possível prever quem são esses pacientes?

Abstract Objective: To assess the frequency of baked egg tolerance in IgE-mediated egg allergy patients through the oral food challenge and to assess the tolerance predictability of different skin prick tests, as well as specific serum IgE measurement to egg proteins. Methods: In this cross-sectional study, 42 patients with a diagnosis of egg allergy were submitted to different skin prick tests with egg (in natura, boiled, muffin, ovalbumin, and ovomucoid), and specific IgE to egg white, ovalbumin, and ovomucoid; as well as to the oral food challenge with food containing egg, extensively baked in a wheat matrix. Results: Of the total, 66.6% of patients tolerated the ingestion of egg-containing foods in the oral food challenge. A comparative analysis with positive and negative oral food challenge found no significant differences regarding age, gender, other food allergies, or even specific skin prick tests and IgE values between the groups. Conclusions: The study demonstrated an elevated frequency of baked egg food-tolerant individuals among egg allergy patients. None of the tested markers, skin prick tests, or specific IgE, were shown to be good predictors for identifying baked egg-tolerant patients. The oral food challenge with egg baked in a matrix is central to demonstrate tolerance and the early introduction of baked foods, improving patients' and families' quality of life and nutrient intake.

Resumo Objetivo: Avaliar a frequência de tolerância a alimentos assados com ovo em pacientes com alergia ao ovo mediada por IgE por meio do teste de provocação oral e verificar a capacidade de predição de tolerância ao ovo por meio de teste cutâneo de leitura imediata (Skin Prick Test ou SPT) e de dosagem sérica de IgE específica para componentes do ovo. Métodos: Estudo transversal, 42 pacientes com diagnóstico de alergia ao ovo foram submetidos a SPT com ovo (in natura, cozido, bolinho, ovoalbumina e ovomucoide), IgE específica para clara de ovo, ovoalbumina e ovomucoide e ao teste de provocação oral com alimento com ovo extensamente assado em matriz de trigo. Resultados: Dos pacientes, 66,6% toleraram a ingestão do alimento com ovo durante o teste de provocação oral. Não encontramos diferenças em relação a idade, gênero, outras alergias alimentares ou mesmo entre os valores dos SPT e IgE específica na análise comparativa entre os grupos com teste de provocação oral positivo e teste de provocação oral negativo. Conclusões: Foi demonstrada uma elevada frequência de indivíduos tolerantes a ingestão de alimentos assados com ovo entre os pacientes com alergia a ovo mediada por IgE. Nenhum dos marcadores testados, SPT ou IgE específica, demonstrou ser bom preditor para identificar os pacientes tolerantes. Consideramos que os testes de provocação oral com alimentos com ovo assado sejam fundamentais para a introdução desses assados, melhorar a qualidade de vida e a ingestão de nutrientes dos pacientes e famílias.

Inmunoterapia con alérgenos de ácaros en pacientes con rinitis alérgica y apnea obstructiva del sueño / Immunotherapy with mite allergens in patients with allergic rhinitis and obstructive sleep apnea

Para confirmar la presencia de apneea obstructiva del sueño (OSA) en rinitis alérgica (RA), se realizó poligrafía cardiorrespiratoria (CRP) y para tratar ambas condiciones, inmunoterapia alérgeno específica (ITAE). El diseño fue descriptivo en el universo de pacientes del servicio de Alergología del policlínico Previsora en Camagüey, Cuba, desde diciembre 2018 a marzo 2020. Se seleccionaron 326 pacientes en orden consecutivo de asistencia a la consulta, teniendo en cuenta los criterios: ≥5 años con RA, sospecha de OSA y prueba cutánea con ácaros: Dermatophagoides pteronyssinus, Dermatophagoides siboney y Blomia tropicalis, producidos en: Centro Nacional de Biopreparados de Cuba. Todos recibieron ASIT por ≥10 meses y se realizó CRP antes y después de la ASIT. La CRP se realizó utilizando el marcaje automático de eventos de ApneaLink AirTM (Resmed Corp., RFA), validado para estudiar los trastornos del sueño en el hogar. Los resultados de la prueba cutánea y de CRP se evaluaron antes y después de la ASIT; también la eficacia de la ASIT según criterios de pacientes y profesionales. De la muestra, 152 fueron del sexo femenino y 174 del sexo masculino para un 46,6 por ciento y 53,4 por ciento respectivamente; aquellos con habón de 5 a 6 mm fueron los más representados (p=0,04). Hubo descenso en los niveles de gravedad de OSA después de la ASIT (p=0,025). En la valoración de la eficacia de la ASIT, hubo un número significativo de mejorados (p=0,012). La CRP proporciona el diagnóstico de OSA en RA, y la ASIT cambia el curso de ambas condiciones(AU)

To confirm the presence of obstructive sleep apnea (OSA) in allergic rhinitis (AR), cardiorespiratory polygraphy (CRP) was performed, and to treat both conditions, the allergen specific immunotherapy (ASIT) was used in order to change their course. Descriptive study in the universe of patients from Previsora polyclinic Allergology service, Camagüey, Cuba was carried-out from December 2018 to March 2020. 326 patients were selected in consecutive order of attendance at the consultation, taking into account the criteria: ≥5 years with AR, suspicion of OSA and positive skin test to: Dermatophagoides pteronyssinus, Dermatophagoides siboney and Blomia tropicalis, supplied by the National Center for Biopreparations in Cuba. All patients received ASIT for ≥10 months and CRP was performed before and after ASIT. The CRP results were taken from the automatic scoring of the ApneaLink AirTM device (Resmed Corp., Australia), validated to study OSA at home. The skin test and CRP results were evaluated before and after the ASIT. In addition, the assessment of the ASIT efficacy according to criteria of patients and professionals was performed. The sample was made-up of 152 female patients (46.6 percent) and 174 males (53.4 percent); those with 5 to 6 mm wheal were the most represented (p=0.04). There was decrease in OSA severity levels after ASIT (p=0.025). The ASIT efficacy was proved with a significant number of improvements (p=0.012). CRP provides the diagnosis of OSA in AR, and ASIT changes the course of both conditions(AU)

Update on perioperative hypersensitivity reactions: joint document from the Brazilian Society of Anesthesiology (SBA) and Brazilian Association of Allergy and Immunology (ASBAI) - Part II: etiology and diagnosis / Atualização sobre reações de hipersensibilidade perioperatória: documento conjunto da Sociedade Brasileira de Anestesiologia (SBA) e Associação Brasileira de Alergia e Imunologia (ASBAI) - Parte II: etiologia e diagnóstico

Abstract This second joint document, written by experts from the Brazilian Association of Allergy and Immunology (ASBAI) and Brazilian Society of Anesthesiology (SBA) concerned with perioperative anaphylaxis, aims to review the pathophysiological reaction mechanisms, triggering agents (in adults and children), and the approach for diagnosis during and after an episode of anaphylaxis. As anaphylaxis assessment is extensive, the identification of medications, antiseptics and other substances used at each setting, the comprehensive data documentation, and the use of standardized nomenclature are key points for obtaining more consistent epidemiological information on perioperative anaphylaxis.

Resumo Este segundo documento, escrito por especialistas da Associação Brasileira de Alergia e Imunologia (ASBAI) e da Sociedade Brasileira de Anestesiologia (SBA) interessados no tema anafilaxia perioperatória, tem por objetivo revisar os mecanismos fisiopatológicos, agentes desencadeantes (em adultos e crianças), assim como a abordagem diagnóstica durante e após o episódio. Por se tratar de uma avaliação abrangente, a identificação das medicações, antissépticos e outras substâncias usadas em cada região, registros detalhados, e nomenclatura padronizada são pontos fundamentais para a obtenção de dados epidemiológicos mais fidedignos sobre a anafilaxia perioperatória.

Inmunoterapia con ácaros Valergen por vía sublingual y subcutánea en pacientes alérgicos. Cabaiguán 2010-2019 / Sublingual and subcutaneous Valergen mite immunotherapy in allergic patients in Cabaiguán 2010-2019

RESUMEN Fundamento: La inmunoterapia consiste en la administración de dosis crecientes del alérgeno para controlar la sensibilidad hacia este. Objetivo: Describir el comportamiento de la inmunoterapia por vía subcutánea o sublingual a ácaros. Metodología: Estudio retrospectivo realizado en Cabaiguán, periodo de 2010 a 2019, el universo de 267 pacientes con pruebas positivas a ácaros y la muestra de 53 pacientes. Los datos se obtuvieron del registro de datos. Resultados: Usó la vía sublingual el 60.4 %, predominó el grupo de edad entre 5-18 años (41.5 %), la vía subcutánea se utilizó en un 39.6 %, fue más frecuente en el sexo masculino (58.5 %). La vía subcutánea se indicó mayoritariamente en la rinitis alérgica (20.7 %) y la sublingual en el asma (32.1 %); para ambas, fue el Dermatofagoide pteronyssinus el ácaro de mayor sensibilidad y utilización (43.4 %), el tiempo de administración dominante fue de 3 años (67.9 %). El control de los síntomas se alcanzó con la vía sublingual (37.7 %). En la vía sublingual no se presentaron eventos adversos en el 43.3 %, con la vía subcutánea 11.3 % de los eventos adversos fueron locales y 7.6 % sistémicos leves. Conclusiones: La vía sublingual fue la más utilizada, la de mayor control de los síntomas y menos eventos adversos en el estudio.

ABSTRACT Background: Immunotherapy consists of the administration of the allergen increasing doses to control sensitivity towards it. Objective: To describe the behavior of subcutaneous or sublingual immunotherapy to mites. Methodology: Retrospective study carried out in Cabaiguán, from 2010 to 2019, the universe of 267 patients with positive tests to mites and the sample 53 patients. Data were obtained from the data record. Results: 60.4 % used sublingual, the age group between 5-18 years prevailed (41.5 %), the subcutaneous was used in 39.6 %, and it was more frequent in males (58.5 %). The subcutaneous was indicated mainly in allergic rhinitis (20.7 %) and sublingual in asthma (32.1 %); for both, Dermatofagoide pteronyssinus was the highest sensitivity and use mite (43.4 %) the dominant administration time was 3 years (67.9 %). Symptom control was achieved by sublingual (37.7 %). In sublingual, there were no adverse events in 43.3 %, with the subcutaneous, 11.3 % of the adverse events were local and 7.6 % were mild systemic. Conclusions: Sublingual was the most used, the one with the highest control of symptoms and the fewest adverse events in the study.

Prevalence of latex sensitivity and allergy among physicians of a residency program in a children´s hospital of Buenos Aires. / Prevalencia de sensibilidad y alergia al látex en médicos de un programa de residencia de un hospital pediátrico de Buenos Aires.

Introduction: International publications estimate a 7 %-17 % latex sensitization (LS) prevalence among health care workers, but values in Argentina are unknown. Objectives: To estimate the prevalence of latex sensitization and allergy among residents of a children's hospital using the immediate-reading prick test and to assess associated risk factors in this population. Population and methods: Cross-sectional study. Residents, trainers, and Chief residents of the Departments of Pediatrics, Orthopedics, Surgery and Intensive Care were included between June and October 2017. All of them were administered a questionnaire (assessing atopic diseases and other risk factors) and underwent the immediatereading prick test. Total and latex-specific immunoglobulin E levels were determined in a subgroup of individuals (first- and fourth-year residents, surgical specialties, and intensive care). Results: A total of 113 participants were included. LS prevalence was 7.96 % (95 % confidence interval: 3.70-14.58); 4 participants were allergic to latex. A history of latex-related symptoms (LRS) was significantly associated with a positive result in the immediate-reading prick test (p = 0.0196; odds ratio: 6.13; 95 % confidence interval: 1.44-26.04). There was no association between LS and the year of the residency program. Conclusions: The observed LS prevalence was 7.9 %. There was a significant relation between a history of LRS and a positive result in the immediate-reading prick test.

Introducción. Publicaciones internacionales estiman una prevalencia de sensibilización al látex (SL) en el personal de salud del 7 % al 17 %, y se desconocen los valores en la Argentina. Objetivos. Estimar la prevalencia de sensibilización y alergia al látex en médicos residentes de un hospital pediátrico mediante la prueba epicutánea de lectura inmediata y evaluar factores de riesgo asociados en dicha población. Población y métodos. Estudio de corte transversal. Se incluyeron los residentes, jefes e instructores de Pediatría, Ortopedia, Cirugía y Terapia Intensiva entre junio y octubre de 2017. En todos, se realizó un cuestionario (que evaluó enfermedades atópicas y otros factores de riesgo) y la prueba epicutánea de lectura inmediata. En un subgrupo (residentes de 1ero, 4to año, especialidades quirúrgicas y terapia) se dosó inmunoglobulina E total y específica para látex. Resultados. Se incluyeron 113 participantes. La prevalencia de SL fue del 7,96 % (intervalo de confianza del 95 %: 3,70-14,58); 4 participantes resultaron alérgicos al látex. El antecedente de síntomas relacionados con el látex se asoció significativamente con prueba epicutánea de lectura inmediata + (p = 0,0196; odds ratio 6,13; intervalo de confianza del 95 %: 1,44-26,04). No hubo asociación entre SL y año de residencia. Conclusiones. La prevalencia de SL hallada fue del 7,9 %. Se evidenció una relación significativa entre el antecedente de SRL y un resultado de prueba epicutánea de lectura inmediata positiva.

Abordagem das reações de hipersensibilidade perioperatória: Orientações da Sociedade Brasileira de Anestesiologia e da Associação Brasileira de Alergia e Imunologia - Parte II: etiologia e diagnóstico / Approach to perioperative hypersensitivity reactions: Guidelines from the Brazilian Society of Anesthesiology and the Brazilian Association of Allergy and Immunology - Part II: etiology and diagnosis

A anafilaxia perioperatória é manifestação importante no contexto de eventos adversos relacionados à cirurgia. Embora frequentemente relacionada à indução anestésica, pode ocorrer por outros agentes administrados por outras vias. A anafilaxia pode se apresentar como colapso cardiovascular, obstrução da via aérea e/ou insuficiência respiratória com ou sem manifestação cutânea, com consequências fatais em muito casos. Apesar de considerada inevitável em alguns casos, a sua incidência poderia (e deveria) ser reduzida através da busca por fármacos mais seguros. A avaliação abrangente de um episódio é um dos elementos primordiais para tornar a exposição subsequente mais segura, com orientações derivadas dessa investigação. Entretanto, representa um desafio estatístico por ser reação rara, randômica e muitas vezes independente de exposições sucessivas dos pacientes a procedimentos de baixo risco. Neste documento são revisados os mecanismos fisiopatológicos, agentes desencadeantes (adultos e crianças), assim como a abordagem diagnóstica durante a crise e após o episódio. Uma avaliação abrangente, a identificação das medicações, antissépticos e outras substâncias usadas em cada região, registros detalhados e nomenclatura padronizada são pontos fundamentais para a obtenção de dados epidemiológicos mais fidedignos sobre a anafilaxia perioperatória.

Perioperative anaphylaxis is an important manifestation in the context of surgery-related adverse events. Although often related to anesthetic induction, it may be caused by other agents administered by other routes. Anaphylaxis may manifest as cardiovascular collapse, airway obstruction and/or respiratory failure with or without skin manifestation, resulting often in death. Although this reaction is considered inevitable in some cases, its incidence could (and should) be reduced by the search for safer drugs. Comprehensive assessment of an allergic reaction is a key element to make subsequent exposure safer, with guidance derived from this investigation. However, surveillance of perioperative anaphylaxis represents a statistical challenge because this is a rare, random reaction and often independent of successive patient exposures to low-risk procedures. This paper reviews pathophysiological mechanisms, triggering agents (adults and children), as well as therapeutic and diagnostic approach during and after an allergic reaction. Comprehensive assessment, identification of medications/antiseptics used in each region and detailed records with standardized terminology are key points for obtaining more reliable epidemiological data on perioperative anaphylaxis.

Caracterización de la rinitis alérgica en el Hospital Universitario General Calixto García. Octubre 2016-Octubre 2017 / Characterization of allergic rhinitis in the General Calixto Garcia University Hospital. October 2016-October 2017

Las enfermedades alérgicas van en aumento importante en todo el mundo. La rinitis alérgica es una enfermedad inflamatoria crónica de la mucosa nasal IgE mediada, alérgeno-específica con participación de diversas células. Nos propusimos caracterizar la rinitis alérgica en pacientes atendidos en el Hospital Universitario General Calixto García. Se realizó un estudio observacional descriptivo de corte transversal, no aleatorizado, entre octubre 2016 y octubre 2017. En una muestra de 100 pacientes que cumplieron los criterios de inclusión, se realizó historia clínica alergológica empleando variables como: edad, sexo, antecedentes patológicos personales y familiares, procedencia, manifestaciones clínicas, y prueba cutánea por punción. Predominó el sexo femenino entre 30 y 39 años de edad, de área urbana, antecedentes patológicos familiares y personales de asma y conjuntivitis. La rinitis intermitente leve prevaleció en nuestro estudio, así como la sensibilidad a Dermatophagoides pteronyssinus. La tercera década de la vida fue la edad promedio de los pacientes. Se concluye que los pacientes presentaron una alta sensibilidad a Dermatophagoides pteronyssinus. La rinitis persistente leve, con la mitad de los casos, obtuvo mayor predominio por la duración de los síntomas(AU)

Allergic diseases are increasing significantly worldwide. Allergic rhinitis is a chronic inflammatory disease of the nasal mucosa, IgE-mediated, allergen-specific with the participation of various cells. The aims of this study was to characterize allergic rhinitis in patients treated at the General Calixto García University Hospital. Descriptive cross-sectional non-randomized observational study was carried out between October 2016 and October 2017. A sample of 100 patients who meet the inclusion criteria was studied. Allergological medical history was performed using variables such as age, sex, personal and family pathological history, origin, clinical manifestations, and puncture skin test. Female sex predominated between 30 and 39 years old, urban area, family and personal pathological history of asthma and conjunctivitis. Mild intermittent rhinitis predominated in our study. Sensitivity to Dermatophagoides pteronyssinus. The third decade of life was the average age of the patients in this study. We summarize that patients had presented a high sensitivity to Dermatophagoides pteronyssinus. Mild persistent rhinitis with half of the cases had a greater predominance for the duration of symptoms(AU)

High rate of sensitization to Kathon CG, detected by patch tests in patients with suspected allergic contact dermatitis.

BACKGROUND: Kathon CG, a combination of methylchloroisothiazolinone and methylisothiazolinone, is widely used as preservative in cosmetics, as well in household cleaning products, industrial products such as paints and glues. It has emerged as an important sensitizing agent in allergic contact dermatitis. OBJECTIVES: This study evaluated the reactivity to this substance in patients subjected to patch tests at the Dermatology Institute in Bauru, São Paulo from 2015 to 2017 and its correlation with other preservatives, the professional activity and location of the lesions. METHODS: The patients were submitted to standard series of epicutaneous tests, standardized by the Brazilian Group Studies on Contact Dermatitis. RESULTS: Out the 267 patients tested, 192 presented positivity to at least one substance and 29 of the patients (15.10%) presented reaction to Kathon CG, with predominance of the female gender (n=27); main professional activity associated with Kathon CG sensibilization was cleaning (17.24%), followed by aesthetic areas (13.79%) and health care (10.34%). The most prevalent sensitizations among the substances tested were nickel sulphate (56.3%), followed by cobalt chloride (23.4%), neomycin (18.2%), potassium dichromate (17.7%), thimerosal (14.5%), formaldehyde (13.2%), paraphenylenediamine (9.3%), and fragrance mix (8.3%). STUDY LIMITATIONS: We do not have data from patients that were submitted to patch test a decade ago in order to confront to current data and establish whether or no sensitization to Kathon CG has increased. CONCLUSION: High positivity to Kathon CG corroborates the recent findings in the literature, suggesting more attention to concentration of this substance, used in cosmetics and products for domestic use.

Atualização sobre reações de hipersensibilidade perioperatória: Documento conjunto da Sociedade Brasileira de Anestesiologia e Associação Brasileira de Alergia e Imunologia ­ Parte II: etiologia e diagnóstico / Update on perioperative hypersensitivity reactions: Joint document from the Brazilian Society of Anesthesiology and Brazilian Association of Allergy and Immunology ­ Part II: Etiology and diagnosis

A anafilaxia perioperatória é manifestação importante no contexto de eventos adversos relacionados à cirurgia. Embora frequentemente relacionada à indução anestésica, pode ocorrer por outros agentes administrados por outras vias. A anafilaxia pode se apresentar como colapso cardiovascular, obstrução da via aérea e/ou insuficiência respiratória com ou sem manifestação cutânea, com consequências fatais em muito casos. Apesar de considerada inevitável em alguns casos, a sua incidência poderia (e deveria) ser reduzida através da busca por fármacos mais seguros. A avaliação abrangente de um episódio é um dos elementos primordiais para tornar a exposição subsequente mais segura, com orientações derivadas dessa investigação. Entretanto, representa um desafio estatístico por ser reação rara, randômica e muitas vezes independente de exposições sucessivas dos pacientes a procedimentos de baixo risco. Neste documento são revisados os mecanismos fisiopatológicos, agentes desencadeantes (adultos e crianças), assim como a abordagem diagnóstica durante a crise e após o episódio. Uma avaliação abrangente, a identificação das medicações, antissépticos e outras substâncias usadas em cada região, registros detalhados e nomenclatura padronizada são pontos fundamentais para a obtenção de dados epidemiológicos mais fidedignos sobre a anafilaxia perioperatória.

Perioperative anaphylaxis is an important manifestation in the context of surgery-related adverse events. Although often related to anesthetic induction, it may be caused by other agents administered by other routes. Anaphylaxis may manifest as cardiovascular collapse, airway obstruction and/or respiratory failure with or without skin manifestation, resulting often in death. Although this reaction is considered inevitable in some cases, its incidence could (and should) be reduced by the search for safer drugs. Comprehensive assessment of an allergic reaction is a key element to make subsequent exposure safer, with guidance derived from this investigation. However, surveillance of perioperative anaphylaxis represents a statistical challenge because this is a rare, random reaction and often independent of successive patient exposures to low-risk procedures. This paper reviews pathophysiological mechanisms, triggering agents (adults and children), as well as therapeutic and diagnostic approach during and after an allergic reaction. Comprehensive assessment, identification of medications/antiseptics used in each region and detailed records with standardized terminology are key points for obtaining more reliable epidemiological data on perioperative anaphylaxis.

High rate of sensitization to Kathon CG, detected by patch tests in patients with suspected allergic contact dermatitis

Abstract Background: Kathon CG, a combination of methylchloroisothiazolinone and methylisothiazolinone, is widely used as preservative in cosmetics, as well in household cleaning products, industrial products such as paints and glues. It has emerged as an important sensitizing agent in allergic contact dermatitis. Objectives: This study evaluated the reactivity to this substance in patients subjected to patch tests at the Dermatology Institute in Bauru, São Paulo from 2015 to 2017 and its correlation with other preservatives, the professional activity and location of the lesions. Methods: The patients were submitted to standard series of epicutaneous tests, standardized by the Brazilian Group Studies on Contact Dermatitis. Results: Out the 267 patients tested, 192 presented positivity to at least one substance and 29 of the patients (15.10%) presented reaction to Kathon CG, with predominance of the female gender (n = 27); main professional activity associated with Kathon CG sensibilization was cleaning (17.24%), followed by aesthetic areas (13.79%) and health care (10.34%). The most prevalent sensitizations among the substances tested were nickel sulphate (56.3%), followed by cobalt chloride (23.4%), neomycin (18.2%), potassium dichromate (17.7%), thimerosal (14.5%), formaldehyde (13.2%), paraphenylenediamine (9.3%), and fragrance mix (8.3%). Study limitations: We do not have data from patients that were submitted to patch test a decade ago in order to confront to current data and establish whether or no sensitization to Kathon CG has increased. Conclusion: High positivity to Kathon CG corroborates the recent findings in the literature, suggesting more attention to concentration of this substance, used in cosmetics and products for domestic use.

Baked egg tolerance: is it possible to predict?

OBJECTIVE: To assess the frequency of baked egg tolerance in IgE-mediated egg allergy patients through the oral food challenge and to assess the tolerance predictability of different skin prick tests, as well as specific serum IgE measurement to egg proteins. METHODS: In this cross-sectional study, 42 patients with a diagnosis of egg allergy were submitted to different skin prick tests with egg (in natura, boiled, muffin, ovalbumin, and ovomucoid), and specific IgE to egg white, ovalbumin, and ovomucoid; as well as to the oral food challenge with food containing egg, extensively baked in a wheat matrix. RESULTS: Of the total, 66.6% of patients tolerated the ingestion of egg-containing foods in the oral food challenge. A comparative analysis with positive and negative oral food challenge found no significant differences regarding age, gender, other food allergies, or even specific skin prick tests and IgE values between the groups. CONCLUSIONS: The study demonstrated an elevated frequency of baked egg food-tolerant individuals among egg allergy patients. None of the tested markers, skin prick tests, or specific IgE, were shown to be good predictors for identifying baked egg-tolerant patients. The oral food challenge with egg baked in a matrix is central to demonstrate tolerance and the early introduction of baked foods, improving patients' and families' quality of life and nutrient intake.

High rate of sensitization to Kathon CG, detected by patch tests in patients with suspected allergic contact dermatitis

Background: Kathon CG, a combination of methylchloroisothiazolinone and methylisothiazolinone, is widely used as preservative in cosmetics, as well in household cleaning products, industrial products such as paints and glues. It has emerged as an important sensitizing agent in allergic contact dermatitis. Objectives: This study evaluated the reactivity to this substance in patients subjected to patch tests at the Dermatology Institute in Bauru, São Paulo from 2015 to 2017 and its correlation with other preservatives, the professional activity and location of the lesions. Methods: The patients were submitted to standard series of epicutaneous tests, standardized by the Brazilian Group Studies on Contact Dermatitis. Results: Out the 267 patients tested, 192 presented positivity to at least one substance and 29 of the patients (15.10%) presented reaction to Kathon CG, with predominance of the female gender (n = 27); main professional activity associated with Kathon CG sensibilization was cleaning (17.24%), followed by aesthetic areas (13.79%) and health care (10.34%). The most prevalent sensitizations among the substances tested were nickel sulphate (56.3%), followed by cobalt chloride (23.4%), neomycin (18.2%), potassium dichromate (17.7%), thimerosal (14.5%), formaldehyde (13.2%), paraphenylenediamine (9.3%), and fragrance mix (8.3%). Study limitations: We do not have data from patients that were submitted to patch test a decade ago in order to confront to current data and establish whether or no sensitization to Kathon CG has increased. Conclusion: High positivity to Kathon CG corroborates the recent findings in the literature, suggesting more attention to concentration of this substance, used in cosmetics and products for domestic use.

Importancia de los alérgenos de ácaros domésticos en el diagnóstico de la rinitis alérgica con síndrome de apnea-hipopnea del sueño / Importance of household mite allergens in the diagnosis of allergic rhinitis with sleep apnea-hypopnea syndrome

Los ácaros Dermatophagoides pteronyssinus (Dp), Dermatophagoides siboney (Ds) y Blomia tropicalis (Bt), constituyen la herramienta fundamental para diagnóstico e inmunoterapia de rinitis alérgica (RA), que en muchas ocasiones se asocia al síndrome apnea-hipopnea obstructiva del sueño (SAHOS). Para diagnosticar SAHOS se seleccionaron 465 individuos del registro de alergia del Policlínico Previsora, Camagüey, Cuba, con diagnóstico presuntivo de RA. Se descartaron aquellos con prueba cutánea Prick test negativa a Dp, Ds y Bt y sin poligrafía cardio-respiratoria (PCR), quedando para estudio 236 pacientes entre 8 y 70 años de edad: 102 casos (43,2 por ciento) definidos como aquellos con respiración oral y ronquidos y 134 controles (56,7 por ciento) sin respiración oral ni ronquidos. La PCR se realizó utilizando el marcaje automático de eventos del dispositivo ApneaLink AirTM (Resmed Corp., RFA). La media del tamaño del habón fue de 5,9 mm en los casos (p=0,02). El índice de apnea e hipopnea (IAH) fue positivo en 129 pacientes (54,6 por ciento); de ellos, 97 casos (41,1 por ciento) y 32 controles (13,5 por ciento). Los pacientes con IAH˃20/h predominaron en los casos con 21 individuos (8,8 por ciento) (p꞊0,048). La sensibilidad del PCR fue del 95,10 por ciento, su especificidad del 76,12 por ciento. Los valores predictivos positivos y negativos del 75,19 por ciento y 95,33 por ciento respectivamente. Se estimó en 3,98 la razón de verosimilitud positiva y de 0,06 la negativa. Los pacientes con SAHOS en los casos y controles presentan incremento con predominio para casos (p=0,002). La PCR con el dispositivo ApneaLink permite hacer el diagnóstico de SAHOS en RA(AU)

The mites Dermatophagoides pteronyssinus (Dp), Dermatophagoides siboney (Ds) and Blomia tropicalis (Bt) are the primary tool for the diagnosis and immunotherapy of Allergic Rhinitis (AR), which is often associated with the Obstructive Sleep Apnea-Hypopnea Syndrome (OSAHS). To diagnose OSAHS, 465 individuals were selected from the allergy registry of the Previsora Polyclinic, Camagüey, Cuba, with presumptive diagnosis of AR. Those with a skin test (Prick test) negative to Dp, Ds and Bt, and without a previous Cardiorespiratory Polygraphy (CRP) were discarded, leaving 236 patients between 8 and 70 years old: 102 cases (43.2 percent) those with oral breathing and snoring and 134 controls (56.7 percent) without oral breathing or snoring. The CRP data analysis was performed using the automatic algorithm of the ApneaLink AirTM device (Resmed Corp., Germany). The average size of the wheal was 5.9 mm in cases (p = 0.02). The Apnea Hypopnea Index (AHI) was greater than 5 events/hour in 129 patients (54.6 percent); of those, 97 cases (41.1 percent) and 32 controls (13.5 percent). Patients with AHI˃20/h predominated in cases with 21 individuals (8.8 percent) (p꞊0.048). The sensitivity of the PCR was 95.10 percent, its specificity 76.12 percent. The positive and negative predictive values were 75.19 percent and 95.33 percent respectively. The positive likelihood ratio was 3.98 and the negative one was 0.06. The prevalence of OSAHS was significantly higher in cases compared to controls (p =0.002). The CRP with the ApneaLink device allows the diagnosis of SAHOS in AR(AU)

Testes in vivo nas reações de hipersensibilidade a medicamentos - Parte I: testes cutâneos / In vivo tests in hypersensitivity drug reactions - Part I: skin tests

As reações de hipersensibilidade a medicamentos são frequentes na prática clínica e são consideradas problema de saúde pública. O diagnóstico inclui, após detalhada história clínica, a realização de testes in vivo: cutâneos ou de provocação. Recentemente, estes testes foram aprovados pela Câmara Técnica da Associação Médica Brasileira para inclusão tanto no SUS, como na Saúde Suplementar, o que facilitará o acesso dos pacientes a estas ferramentas. Nesta revisão, abordaremos com mais detalhes as indicações, técnica e impacto da utilização dos testes cutâneos com fármacos na prática clínica.

Hypersensitivity drug reactions are frequent in clinical practice and are considered an important public health issue. Diagnosis includes a detailed clinical history, followed by in vivo tests, such as skin tests and drug provocation tests. Those tests were recently approved by the Brazilian Medical Association Technical Board to be included in both public and private practice, which will facilitate investigation with those tools. In this review paper, we will address in more detail the indications, technique, and impact of the use of skin tests to drugs in clinical practice.

Assessment of patch test results carried out during ten years in a city in southern Brazil

Abstract: Background: Contact dermatitis affects up to 20% of the population. Patch testing for contact allergy may be needed to confirm the diagnosis. Objectives: To describe and discuss the results of patch tests performed in a city in southern Brazil. Methods: A cross-sectional analysis was performed on all skin test results over ten years. Variables such as gender, age at the time of testing, and test results were evaluated. Triggering factors, duration of complain, and previous medications used related to the clinical history were retrieved for some patients by reviewing their medical records. Results: The sample was composed of 539 patch tests, of which 411 (76.2%) were from women. The age of the tested subjects ranged from 5 to 87 years. The prevalence of positive reactions in the patch tests was 391 (72.5%). The most prevalent positive reaction was to nickel sulfate (196; 36.4%), which had statistical significance when associated with female gender (p<0,001). Study limitations: Database obtained through secondary sources (the reports of the exams and the medical records), occurring the incomplete registration of some information. Conclusions: Data analysis at the local level is important to define preventive policies.