Drug Hypersensitivity Associated with Dental Treatments

ABSTRACT Objective: To characterize drug hypersensitivity associated with dental treatments. Material and Methods: Data from 5,302 dental patients extracted from the Faculty of Dental Medicine were used to investigate drug use history, drug hypersensitivity, and associations with oral health outcomes. The chi-square test was used, and values of p ≤ 0.05 were considered statistically significant. Results: The frequency of patients' self-reported drug hypersensitivity was 26.42% (n = 1,401). The highest frequencies were for opioid/narcotic analgesics (20.84%, n = 292), antibiotics (18.13%, n = 961), and non-steroidal anti-inflammatory drugs (10.46%, n = 141). Most of the patients (68.65%, n = 3,640) reported using medications, mostly for cardiovascular disease (43.1%, n = 1,569), for psychiatric/neurological disorders (39.75%, n = 1,447), drugs that affect the endocrine system (32.55%, n= 1,185), and drugs for pain (24.92%, n = 907). Higher drug hypersensitivity frequencies were associated with older White female subjects (p<0.0001). Associations were also identified between drug hypersensitivity and history of the following dental procedures: tooth extractions (p=0.003), root canal treatment (p=0.0004), prosthodontic treatments (p<0.0001), and orthodontic treatments (p=0.007). Conclusion: A high frequency of self-reported drug hypersensitivity in dental patients was found, with a higher occurrence in older White women and those with a history of more extensive and invasive dental care.

Allergy to penicillin and betalactam antibiotics / Alergia a penicilina e antibióticos beta-lactâmicos

ABSTRACT Betalactams are the most frequent cause of hypersensitivity reactions to drugs mediated by a specific immune mechanism. Immediate reactions occur within 1 to 6 hours after betalactam administration, and are generally IgE-mediated. They clinically translate into urticaria, angioedema and anaphylaxis. Non-immediate or delayed reactions occur after 1 hour of administration. These are the most common reactions and are usually mediated by T cells. The most frequent type is the maculopapular or morbilliform exanthematous eruption. Most individuals who report allergies to penicillin and betalactams can tolerate this group of antibiotics. To make diagnosis, a detailed medical history is essential to verify whether it was an immediate or non-immediate reaction. Thereafter, in vivo and/or in vitro tests for investigation may be performed. The challenging test is considered the gold standard method for diagnosis of betalactam hypersensitivity. The first approach when suspecting a reaction to betalactam is to discontinue exposure to the drug, and the only specific treatment is desensitization, which has very precise indications. The misdiagnosis of penicillin allergy affects the health system, since the "penicillin allergy" label is associated with increased bacterial resistance, higher rate of therapeutic failure, prolonged hospitalizations, readmissions, and increased costs. Thus, it is essential to develop strategies to assist the prescription of antibiotics in patients identified with a label of "betalactam allergy" at hospitals, and to enhance education of patients and their caregivers, as well as of non-specialist physicians.

RESUMO Os beta-lactâmicos constituem a causa mais frequente de reações de hipersensibilidade a fármacos mediadas por mecanismo imunológico específico. As reações imediatas ocorrem em 1 até 6 horas após a administração do beta-lactâmico, sendo geralmente IgE-mediadas. Elas se traduzem clinicamente por urticária, angioedema e anafilaxia. As reações não imediatas ou tardias ocorrem após 1 hora da administração. São as reações mais comuns, sendo geralmente mediadas por células T. O tipo mais frequente é o exantema maculopapular ou morbiliforme. A maioria dos indivíduos que refere alergia aos beta-lactâmicos pode tolerar esse grupo de antibióticos. No diagnóstico, uma história clínica detalhada é fundamental para verificar se a reação foi do tipo imediato ou não imediato. A partir daí, podem ser realizados testes in vivo e/ou in vitro para investigação. O teste de provocação é considerado o método padrão-ouro no diagnóstico de hipersensibilidade aos beta-lactâmicos. A primeira conduta diante da suspeita de uma reação ao beta-lactâmico é suspender a exposição ao medicamento, e o único tratamento específico é a dessensibilização, que possui indicações bem precisas. O diagnóstico equivocado de alergia à penicilina afeta o sistema de saúde, pois o rótulo de "alergia à penicilina" está associado a aumento da resistência bacteriana, maior índice de falha terapêutica, hospitalizações prolongadas, readmissões e aumento dos custos. Assim, torna-se fundamental elaborar estratégias com o objetivo de auxiliar na prescrição de antibióticos em pacientes com rótulo de "alergia aos beta-lactâmicos" nos hospitais e melhorar a educação dos pacientes e seus responsáveis, além de médicos não especialistas.

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.

Update on perioperative hypersensitivity reactions: joint document of the Brazilian Society of Anesthesiology (SBA) and Brazilian Association of Allergy and Immunology (ASBAI) - Part I: post-crisis guidelines and treatment / Atualização sobre reações de hipersensibilidade perioperatória: documento conjunto da Sociedade Brasileira de Anestesiologia (SBA) e Associação Brasileira de Alergia e Imunologia (ASBAI) - Parte I: tratamento e orientação pós-crise

Abstract Experts from the Brazilian Association of Allergy and Immunology (ASBAI) and the Brazilian Society of Anesthesiology (SBA) interested in the issue of perioperative anaphylaxis, and aiming to strengthen the collaboration between the two societies, combined efforts to study the topic and to prepare a joint document to guide specialists in both areas. The purpose of the present series of two articles was to report the most recent evidence based on the collaborative assessment between both societies. This first article will consider the updated definitions, treatment and guidelines after a perioperative crisis. The following article will discuss the major etiologic agents, how to proceed with the investigation, and the appropriate tests.

Resumo Especialistas da Associação Brasileira de Alergia e Imunologia (ASBAI) e da Sociedade Brasileira de Anestesiologia (SBA) interessados no tema anafilaxia perioperatória reuniram-se com o objetivo de intensificar a colaboração entre as duas sociedades no estudo desse tema e elaborar um documento conjunto que possa guiar os especialistas de ambas as áreas. O objetivo desta série de dois artigos foi mostrar as evidências mais recentes alicerçadas na visão colaborativa entre as sociedades. Este primeiro artigo versará sobre as definições mais atuais, formas de tratamento e as orientações após a crise no perioperatório. No próximo artigo serão discutidos os principais agentes causais e a condução da investigação com testes apropriados.

Confirmación diagnóstica de alergia a la amoxicilina en niños tratados en una sección de alergia pediátrica / Diagnostic confirmation of amoxicillin allergy in children treated at a division of Pediatric Allergy

La amoxicilina es un antibiótico betalactámico comúnmente indicado en pediatría y es la causa más frecuente de alergia a medicamentos.Objetivos. Determinar la proporción de alergia confirmada a amoxicilina en niños con sospecha diagnóstica, atendidos en una sección de alergia pediátrica.Población y métodos. Estudio descriptivo retrospectivo entre enero de 2009 y enero de 2017, en menores de 18 años con sospecha diagnóstica de alergia a amoxicilina. Se realizó el diagnóstico según interrogatorio y pruebas específicas.Resultados. Fueron incluidos 234 pacientes; se diagnosticó alergia a la amoxicilina en el 10,7 % (intervalo de confianza del 95 %: 7-15). Estos pacientes tenían mayor prevalencia de síntomas inmediatos (el 40 % vs. el 22 %, p = 0,048) y de exposición previa a betalactámicos (el 84 % vs. el 56 %, p = 0,007).Conclusión. La confirmación de alergia a la amoxicilina en niños derivados a especialistas fue del 10,7 %.

Amoxicillin is a beta-lactam antibiotic commonly indicated in pediatrics and the most frequent cause of drug allergies.Objectives. To determine the proportion of confirmed amoxicillin allergy in children with diagnostic suspicion seen at the Division of Pediatric Allergy.Population and methods. This descriptive, retrospective study was done between January 2009 and January 2017 in children younger than 18 years with diagnostic suspicion of amoxicillin allergy. The diagnosis was based on questions and specific tests.Results. A total of 234 patients were included; amoxicillin allergy was diagnosed in 10.7 % (95 % confidence interval: 7-15). These patients had a higher prevalence of immediate symptoms (40 % vs. 22 %, p = 0.048) and prior exposure to beta-lactams (84 % vs. 56 %, p = 0.007).Conclusion. Amoxicillin allergy in children referred to specialists was confirmed in 10.7 %.

Alergia e intolerancia a antiinflamatorios no esteroideos en pediatría / Allergy and intolerance to nonsteroidal anti-inflammatory drugs in children

Los antiinflamatorios no esteroideos son ampliamente recetados en niños. Constituyen la segunda causa de reacciones a medicamentos en pediatría después de los antibióticos betalactámicos; sin embargo, solo una parte de estas son reacciones de hipersensibilidad. La prevalencia de dichas reacciones a antiinflamatorios no esteroideos en niños es del 0,3 % y aumenta al 5 % en asmáticos.Los mecanismos fisiopatológicos involucrados (inhibición de la ciclooxigenasa, hipersensibilidad mediada por inmunoglobulina E, linfocitos T reactivos y/o afectación de la inmunidad innata) darán lugar a diferentes entidades clínicas con sintomatología dispar.La confusión con síntomas propios de procesos virales y la variabilidad clínica hacen del diagnóstico de certeza un verdadero desafío. Una historia clínica detallada, análisis de laboratorio, pruebas cutáneas y de provocación controlada permitirán definir estrategias para cada paciente en particular sin etiquetar como alérgico a un niño que no lo es ni exponer a riesgos innecesarios a quien está sensibilizado.

Nonsteroidal anti-inflammatory drugs are widely prescribed in children. They are the second cause of drug ́s reactions in pediatrics after beta-lactam antibiotics, however only a part of them are hypersensitivity reactions. The prevalence of these reactions to nonsteroidal anti-inflammatory drugs in children is 0.3 %, increasing to 5 % in asthmatics.The different physiopathological mechanisms involved (inhibition of cyclooxygenase, immunoglobulin E-mediated hypersensitivity, reactive T lymphocytes and/or disturbance of innate immunity) will cause different clinical entities with diverse symptoms.The confusion between the common symptoms of a viral infection and a hypersensitivity reaction, and the variability of the clinical presentations make diagnosis a real challenge.A detailed clinical history, laboratory, skin and controlled provocation tests will provide strategies for each patient, without labeling a child who is not an allergic one, or taking unnecessary risks with those who are sensitized.

Specific questionnaire detects a high incidence of intra-operative hypersensitivity reactions

OBJECTIVE: To assess the incidence of intra-operative immediate hypersensitivity reactions and anaphylaxis. METHODS: A cross-sectional observational study was conducted at the Department of Anesthesiology, University of São Paulo School of Medicine, Hospital das Clínicas, São Paulo, Brazil, from January to December 2010. We developed a specific questionnaire to be completed by anesthesiologists. This tool included questions about hypersensitivity reactions during anesthesia and provided treatments. We included patients with clinical signs compatible with immediate hypersensitivity reactions. Hhypersensitivity reactions were categorized according to severity (grades I-V). American Society of Anesthesiologists physical status classification (ASA 1-6) was analyzed and associated with the severity of hypersensitivity reactions. RESULTS: In 2010, 21,464 surgeries were performed under general anesthesia. Anesthesiologists answered questionnaires on 5,414 procedures (25.2%). Sixty cases of intra-operative hypersensitivity reactions were reported. The majority patients (45, 75%) had hypersensitivity reactions grade I reactions (incidence of 27.9:10,000). Fifteen patients (25%) had grade II, III or IV reactions (intra-operative anaphylaxis) (incidence of 7:10,000). No patients had grade V reactions. Thirty patients (50%) were classified as ASA 1. The frequency of cardiovascular shock was higher in patients classified as ASA 3 than in patients classified as ASA 1 or ASA 2. Epinephrine was administered in 20% of patients with grade III hypersensitivity reactions and in 50% of patients with grade II hypersensitivity reactions. CONCLUSIONS: The majority of patients had hypersensitivity reactions grade I reactions; however, the incidence of intra-operative anaphylaxis was higher than that previously reported in the literature. Patients with ASA 3 had more severe anaphylaxis; however, the use of epinephrine was not prescribed in all of these cases. Allergists and anesthesiologists should implement preventive measures to reduce the occurrence of anaphylaxis.

Alergia a drogas: Experiencia en 771 procedimientos / Allergy to drugs. Experience in 771 procedures

Las reacciones de hipersensibilidad a drogas (RHD) son aquellas que se presentan clínicamente como alérgicas. Las mismas pueden involucrar o no un mecanismo inmunológico de lesión. Las RHD son frecuentes y en ocasiones pueden poner en riesgo la vida. Los pacientes con RHD a una droga repiten la reacción ante una nueva exposición, limitando el arsenal terapéutico y exponiendo al sujeto a drogas más caras y/o más tóxicas. La identificación de la droga responsable de una RHD es difícil cuando la historia clínica no es reciente u ocurrió en el contexto de múltiples drogas y enfermedades concurrentes. El diagnóstico puede establecerse por la historia clínica, pruebas cutáneas y desafíos progresivos a drogas. Describimos nuestra experiencia en 771 procedimientos, 331 pruebas cutáneas y 440 desafíos progresivos a drogas, con un 11% de pruebas positivas. Las manifestaciones de positividad fueron prurito, rash, urticaria, angioedema, rinitis, broncoespasmo, náuseas y anafilaxia. Todos respondieron efectivamente al tratamiento de rescate. Las pruebas con drogas, realizadas en un contexto correcto, son seguras y sirven para confirmar o descartar el diagnóstico en un paciente con sospecha de alergia a drogas.

Drug hypersensitivity reactions (RHD) are those that present clinically as allergic. They can or cannot involve an immunologic mechanism of lesion. They are frequent and, occasionally, life threatening. Patients with RHD repeat the reaction when they are re-exposed to the drug, limiting the therapeutic options and exposing them to more expensive and toxic drugs. It is difficult to identify the responsible drug when the reaction was not recent or when it occurred in the context of therapy with multiple drugs or confusing concurrent diseases. The diagnosis should be based on clinical history, followed by drug skin tests and drug provocation tests. We describe our experience in 771 procedures, 331 cutaneous and 440 drug provocation tests, 11% of them were positive. Positive symptoms included generalized pruritus, rash, urticaria, angioedema, rhinitis, bronchospasm, nausea and anaphylaxis. All the patients with positive tests had a good response to treatment. It can therefore be concluded that drug tests undertaken on individuals with suspected drug allergy, performed by experienced personnel and in controlled settings, are useful and safe to confirm drug hypersensitivity.

Allergic reaction to patent blue dye in breast surgery - case report / Reação alérgica ao corante azul patente em cirurgia de mama - relato de caso

Abstract We present a case of allergic reaction to patent blue in a patient who underwent excision of sentinel lymph node associated with segmental breast resection. About 20 min after the dye injection, the patient developed hypotension (BP = 70 × 30 mmHg) associated with increased heart frequency. The patient was treated successfully with decreased inspired fraction of inhaled anesthetic and fluid replacement. At the end of the procedure, she presented with bluish urticarial-like plaques on the head, neck, upper limbs, and trunk; hydrocortisone was then used. The patient recovered uneventfully and was discharged from the PACU 2 h after the end of surgery without skin changes, and was discharged from hospital on the morning after surgery. The incidence of allergic reactions with the use of patent blue is far superior to the hypersensitivity reactions seen with anesthetic and adjuvant drugs. Therefore, the anesthesiologist must be aware of cardiovascular instability associated with skin changes during the use of patent blue, for early diagnosis and appropriate treatment of this hypersensitivity reaction to this dye.

Resumo Os autores apresentam um caso de reação alérgica ao azul patente em uma paciente submetida à exérese de linfonodo em sentinela associada a uma ressecção segmentar de mama. Paciente apresentou aproximadamente pós 20 minutos da injeção do corante hipotensão (PA = 70 × 30 mmHg) associada a aumento da frequência cardíaca. Foi tratada satisfatoriamente com diminuição da fração inspirada do anestésico inalatório e reposição volêmica. No fim do procedimento apresentava placas urticariformes azuladas em cabeça, pescoço, membros superiores e tronco e foi usada hidrocortisona. Evoluiu, sem intercorrências, na sala de recuperação pós-anestésica e teve alta duas horas após o término do procedimento cirúrgico sem a presença das alterações cutâneas. Alta hospitalar na manhã seguinte à cirurgia. A incidência de reações alérgicas com o emprego do azul patente é muito superior às reações de hipersensibilidade observadas com drogas anestésicas e adjuvantes. Portanto, o anestesiologista deve ficar atento à instabilidade cardiovascular associada a alterações cutâneas quando do uso do azul patente para o diagnóstico precoce e tratamento adequado dessa reação de hipersensibilidade com o emprego do corante.

Alertas a alergias y su omisión: una revisión narrativa / Alertas contra alergias e sua omissão: uma revisão narrativa / Allergy alerts and it's override: an overview

OBJETIVO, realizar uma revisão narrativa sobre alertas contra alergias. MÉTODOS, busca em MEDLINE utilizando as palavras-chave "clinical decision support system", "allergy" e "alert". A faixa de tempo definida foi de 16anos (a presente data, 2016). Foram incluídos 17 artigos. RESULTADOS. Os estudos recentes arrojaram valores altos de omissão multifactoriais. CONCLUSÕES. As problemáticas: uma fonte de informação que é incompleta ou inexata, a falta de distinção e esquematização na história clínica entre uma reação imunomediada vs. não imunomediada, ausência de atualização da lista de problemas do paciente. Falta de contexto. Alertas de baixo risco. A fadiga de alertas. Então,é importante obter claridade, exatidão e confiabilidade em cada passo do ciclo de alertas contra alergias. Mais ainda,uma retroalimentação das ações dos usuários, uma avaliação dos alertas omitidos; e una monitoração estrita das reações adversas a fármacos ocorridas em pacientes nos que um alerta tenha sido deflagrada.

OBJETIVO, llevar a cabo una revisión narrativa sobre alertas de alergias. MÉTODOS, búsqueda en MEDLINE usando las palabras clave "clinical decision support system", "allergy" y "alert". El rango establecido de 16 años(hasta la fecha actual, 2016). Se incluyeron 17 artículos. RESULTADOS. Estudios recientes arrojaron altos valores de omisión multifactoriales. CONCLUSIONES. La problemática: una fuente de información incompleta o inexacta, la falta dedistinción y esquematización en la historia clínica de una reacción inmunomediada vs. no inmunomediada, la faltade actualización de la lista de problemas del paciente. La falta de contexto. Alertas de bajo riesgo. Fatiga de alertas. Espor eso importante obtener claridad, precisión y fiabilidad en cada paso del ciclo de alertas de alergias. Aun más, unaretroalimentación de las acciones del usuario, una evaluación de alertas omitidas; y una monitorización estricta de las reacciones adversas producidas en pacientes en los que una alerta se ha activado.

Perioperative anaphylaxis / Anafilaxia perioperatória / Anafilaxia perioperatoria

Anaphylaxis remains one of the potential causes of perioperative death, being generally unanticipated and quickly progress to a life threatening situation. A narrative review of perioperative anaphylaxis is performed.

A anafilaxia continua sendo uma das causas potenciais de morte perioperatória, pois geralmente não é prevista e evolui rapidamente para uma situação ameaçadora da vida. Uma revisão da anafilaxia perioperatória é feita.

La anafilaxia sigue siendo una de las causas potenciales de muerte perioperatoria por ser generalmente no anticipada, y progresar rápidamente a una situación amenazante de la vida. Se realiza una revisión de la anafilaxia perioperatoria.

The Potential Utility of Iodinated Contrast Media (ICM) Skin Testing in Patients with ICM Hypersensitivity

Both immediate and delayed hypersensitivity reactions to iodinated contrast media (ICM) are relatively common. However, there are few data to determine the clinical utility of immunologic evaluation of ICM. To evaluate the utility of ICM skin testing in patients with ICM hypersensitivity, 23 patients (17 immediate and 6 delayed reactions) were enrolled from 3 university hospitals in Korea. With 6 commonly used ICM including iopromide, iohexol, ioversol, iomeprol, iopamidol and iodixanol, skin prick (SPT), intradermal (IDT) and patch tests were performed. Of 10 patients with anaphylaxis, 3 (30.0%) and 6 (60.0%) were positive respectively on SPTs and IDTs with the culprit ICM. Three of 6 patients with urticaria showed positive IDTs. In total, 11 (64.7%) had positive on either SPT or IDT. Three of 6 patients with delayed rashes had positive response to patch test and/or delayed IDT. Among 5 patients (3 anaphylaxis, 1 urticaria and 1 delayed rash) taken subsequent radiological examinations, 3 patients administered safe alternatives according to the results of skin testing had no adverse reaction. However, anaphylaxis developed in the other 2 patients administered the culprit ICM again. With 64.7% (11/17) and 50% (3/6) of the sensitivities of corresponding allergic skin tests with culprit ICM for immediate and delayed hypersensitivity reactions, the present study suggests that skin tests is useful for the diagnosis of ICM hypersensitivity and for selecting safe ICM and preventing a recurrence of anaphylaxis caused by the same ICM.

Hypersensitivity myocarditis confirmed by cardiac magnetic resonance imaging and endomyocardial biopsy

Myocarditis often occurs due to viral infections and postviral immune-mediated responses. Hypersensitivity myocarditis is a rare form of myocarditis. Numerous drugs can induce myocarditis, which is typically reversible after withdrawal of the causative agent. Here, we report a case of hypersensitivity myocarditis that was probably triggered by amoxicillin and that resolved completely with heart failure management as well as discontinuation of the drug. A 68-year-old woman presented with acute chest pain mimicking acute coronary syndromes, but the coronary angiography was normal. A recent history of taking medications, skin rash, and peripheral eosinophilia suggested a diagnosis of hypersensitivity myocarditis, which was confirmed by cardiac magnetic resonance imaging and endomyocardial biopsy.

Zotarolimus-eluting stent-induced hypersensitivity pneumonitis

No abstract available.

Type 1 Ig-E mediated allergy to human insulin, insulin analogues and beta-lactam antibiotics / Hipersensibilidade imediata a insulina humana, análogos de insulina e a antibióticos beta-lactâmicos

Insulin, a crucial therapeutic agent for diabetes mellitus, has been rarely associated with hypersensitivity events. We present a 69-year-old type-2 diabetic patient with urticariform lesions on the sites of subcutaneous injection of insulin. The patient denied any known allergies, except for an unspecific cutaneous reaction after intramuscular penicillin administration in childhood. Prick tests revealed positive reactions to all tested human insulins and insulin analogues. Serum IgE levels were above normal range and RAST tests were positive for human, bovine and porcine insulins, as well as beta-lactams. Type 1 IgEmediated allergy to insulin analogues demands a prompt diagnosis and represents a significant therapeutic challenge in diabetic patients.

A insulina é um agente indispensável para o controlo da diabetes mellitus. Os efeitos adversos da sua administração, em particular fenómenos de hipersensibilidade, são raros. Apresentamos um doente de 69 anos, diabético do tipo 2, com episódios recorrentes de lesões urticariformes nos locais de administração subcutânea de insulina. Negava alergias medicamentosas, à excepção de reacção não especificada na infância após penicilina intramuscular. Foram realizados testes cutâneos por puntura (prick tests) com diversos tipos de insulina humana e análogos, todos com reacções positivas, associando elevação dos níveis de IgE sérica e provas RAST positivas para as insulinas humana, bovina e porcina e para os antibióticos beta-lactâmicos. A alergia a análogos de insulina exige um diagnóstico precoce, originando um desafio terapêutico importante no doente diabético.

Drug reaction with Eosinophilia and Systemic Symptoms (DRESS) / Drug-induced Hypersensitivity Syndrome (DIHS): a review of current concepts / Reação a drogas com eosinofilia e sintomas sistêmicos (DRESS) / Síndrome da hipersensibilidade induzida por droga (DIHS): revisão dos conceitos atuais

The Drug Reaction with Eosinophilia and Systemic Symptoms syndrome, also known as Drug Induced Hypersensitivity Syndrome presents clinically as an extensive mucocutaneous rash, accompanied by fever, lymphadenopathy, hepatitis, hematologic abnormalities with eosinophilia and atypical lymphocytes, and may involve other organs with eosinophilic infiltration, causing damage to several systems, especially to the kidneys, heart, lungs, and pancreas. Recognition of this syndrome is of paramount importance, since the mortality rate is about 10% to 20%, and a specific therapy may be necessary. The pathogenesis is related to specific drugs, especially the aromatic anticonvulsants, altered immune response, sequential reactivation of herpes virus and association with HLA alleles. Early recognition of the syndrome and withdrawal of the offending drug are the most important and essential steps in the treatment of affected patients. Corticosteroids are the basis of the treatment of the syndrome, which may be associated with intravenous immunoglobulin and, in selected cases, Ganciclovir. The article reviews the current concepts involving this important manifestation of adverse drug reaction.

A síndrome Reação a Drogas com Eosinofilia e Sintomas Sistêmicos, também conhecida como Síndrome da Hipersensibilidade Induzida por Droga apresenta-se clinicamente como uma erupção cutâneomucosa extensa tipo exantemática, associada a febre, linfadenopatia, hepatite, anormalidades hematológicas com eosinofilia e linfócitos atípicos, e pode envolver outros órgãos, produzindo insuficiência renal, infiltrado eosinofílico cardíaco e pulmonar, além de pancreatite. O reconhecimento desta síndrome é de suma importância, uma vez que, a taxa de mortalidade é de cerca de 10% a 20% e uma terapia específica pode ser necessária. Sua etiopatogenia está relacionada a drogas específicas, principalmente os anticonvulsivantes aromáticos, alterações imunes, reativação sequencial de herpesvirus e associação com alelos do HLA. O pronto reconhecimento da síndrome e a retirada da droga desencadeante são os passos mais importantes e essenciais no tratamento dos doentes acometidos. Os corticosteróides são as medicações de escolha para o tratamento da síndrome, podendo ser associados imunoglobulina intravenosa e em, alguns casos selecionados, Ganciclovir. O artigo traz uma revisão dos conceitos atuais que envolvem essa importante manifestação de reação adversa a drogas.

Is the skin sensitivity test required for administering equine rabies immunoglobulin.

Background. Rabies immunoglobulins are life-saving in patients with severe exposure to rabies. Despite the high degree of purification of equine rabies immunoglobulin (ERIG), the product inserts still recommend a skin sensitivity test before administration of this heterologous serum. A recent WHO recommendation states that there are no scientific grounds for performing a skin test before administering ERIG because testing does not predict reactions and it should be given irrespective of the result of the test. In this conflicting situation, we assessed the use of the skin sensitivity test in predicting adverse events to ERIG. Methods. The data analysed were from the Antirabies Clinic of the Kempegowda Institute of Medical Sciences Hospital, Bengaluru, India. The period of study was 26 months (June 2008–July 2010). The skin sensitivity test was validated by evaluating its sensitivity, specificity, predictability, falsepositive and false-negative results. Results. A total of 51 (2.6%) adverse events were reported in 31 (1.5%) subjects. Most of these were mild to moderate in nature and subsided without medication. There was no serious adverse event. The sensitivity and specificity of the skin sensitivity test to predict an adverse event was 41.9% and 73.9%, respectively. Conclusion. Our experience with the skin sensitivity test suggests that it may not be required before administering ERIGs, as recommended by WHO.

Hormônio de crescimento e hipersensibilidade por imunocomplexo (Tipo III): uma contraindicação para a dessensibilização / Growth hormone therapy and hypersensitivity type III reaction: a contraindication for desensitization

As reações alérgicas ao GH são raras e usualmente representadas por reações de hipersensibilidade tipo I (IgE mediadas), passíveis de tratamento por dessensibilização. Neste relato de caso, descrevemos a presença de reação alérgica ao GH mediada por imunocomplexo (hipersensibilidade tipo III). Nesta situação, a tentativa de dessensibilização pode perpetuar a formação de imunocomplexo, cujo depósito pode determinar insuficiência renal e respiratória.

Allergic reactions against GH are rare, and usually represented by the hypersensitivity type I (IgE-mediated). This type of reaction can be treated by desensitization. In this case report, we present a patient showing an allergic reaction soon after starting GH therapy mediated by immune complex (hypersensitivity type III reaction). In this condition, the attempt to perform the desensitization procedure can perpetuate immune complex deposition determining a life threatening renal and respiratory insufficiency.

unusual cause of post-operative orbital edema in a child after general anesthesia

We present an unusual ocular complication during the perioperative period, bilateral orbital edema in an otherwise healthy child after an outpatient surgical procedure. Ocular complications under general anesthesia remain a rare event. When periorbital edema is present, the appropriate work-up includes ruling out the potential for an allergic event by reviewing the medications administered and serum tryptase testing. Ophthalmology consultation should be considered to exclude pathology native to the eye itself. An allergist may assist in confirming a diagnosis and for allergic testing, if indicated. In our patient, the eventual diagnosis of exclusion was that of a localized reaction to the cellophane-based eye tape