RESUMO
Asthmatic exacerbations are sometimes triggered by medications, primarily the non-steroidal anti-inflammatory agents (NSAIDS) and beta-blockers. Asthma attacks induced by NSAIDS occur rapidly and can be severe. Widal syndrome is a specific disease entity whose physiopathology remains incompletely explained. Asthma is characteristically severe and steroid dependent; desensitisation with aspirin has been proposed, but this remains controversial. Beta-blockers are contra-indicated in asthma; the ß1 "cardioselectivity" of some agents is not absolute, disappearing at high doses and the "partial agonists" are not better tolerated. However, certain authors have called into question the harmful effect of beta-blockade in moderate and stable asthma. More studies are needed, but the current data suggest that in some cases beta-blockers may be safe but their use requires close supervision. Other molecules can pose problems in asthmatics (dipyridamole, synthetic sex hormones and certain excipients). On the whole, there has been little innovation concerning the hazard that drugs can pose for some asthmatics. The task for the future will be to specify the physiopathology of Widal syndrome, and to clarify the categories of patients in whom beta-blockers can be safely employed as the public health consequences of cardiovascular pathologies make this an important issue for lung specialists.
Assuntos
Asma/etiologia , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Antagonistas Adrenérgicos beta/efeitos adversos , Anti-Inflamatórios não Esteroides/efeitos adversos , Asma/induzido quimicamente , Asma/patologia , Contraindicações , Dipiridamol/efeitos adversos , Progressão da Doença , Excipientes/efeitos adversos , Hormônios Gonadais/efeitos adversos , Humanos , Modelos Biológicos , Exposição Ocupacional/efeitos adversos , Preparações Farmacêuticas , Fatores DesencadeantesRESUMO
BACKGROUND: More perioperative cefazolin use has resulted in an increased risk of cefazolin-associated reactions. OBJECTIVE: The aim of this article is to study immediate reactions to cefazolin and attempt to determine possible allergic cross-reactivity with other ß-lactams using data from the Drug Allergy and Hypersensitivity Database (DAHD). METHODS: All 25 cefazolin-associated reactions in the DAHD were reviewed. The cases identified were then investigated according to the European Network for Drug Allergy (ENDA) recommendations by skin testing and challenges. RESULTS: A total of 10 individuals with proven IgE-mediated cefazolin hypersensitivity were identified between January 1999 and July 2009. All the index reactions were compatible with an acute IgE-mediated process, six with anaphylaxis, two with systemic allergic reactions without hypotension, and two with urticaria/angioedema. Cefazolin skin tests were positive in seven individuals and cefazolin challenges were positive in three more individuals. In the eight cefazolin allergic patients who had challenges with other ß-lactams, there was no positive reaction noted. CONCLUSION AND CLINICAL RELEVANCE: In this cohort of patients with IgE-mediated reactions to cefazolin, a majority tolerated amoxicillin and several patients tolerated other cephalosporins. This implies that the R1 side-chain may play an essential role in IgE-mediated reactions to cefazolin. No clear rule to predict cross-reactivity with other ß-lactams could be determined. More research on IgE-mediated hypersensitivity to cefazolin and other cephalosporins is needed.
Assuntos
Antibacterianos/imunologia , Cefazolina/imunologia , Hipersensibilidade a Drogas/imunologia , Hipersensibilidade Imediata/imunologia , Adolescente , Adulto , Idoso , Antibacterianos/química , Cefazolina/química , Criança , Reações Cruzadas/imunologia , Bases de Dados Factuais , Hipersensibilidade a Drogas/diagnóstico , Feminino , Humanos , Hipersensibilidade Imediata/diagnóstico , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Testes Cutâneos , Adulto JovemAssuntos
Hipersensibilidade a Drogas/imunologia , Hipersensibilidade Tardia/imunologia , Hipersensibilidade Imediata/imunologia , Complicações Intraoperatórias/imunologia , Adjuvantes Anestésicos/administração & dosagem , Adjuvantes Anestésicos/efeitos adversos , Anafilaxia/induzido quimicamente , Anafilaxia/imunologia , Anafilaxia/fisiopatologia , Anestesia , Anestésicos/administração & dosagem , Anestésicos/efeitos adversos , Apresentação de Antígeno , Antipsicóticos/administração & dosagem , Antipsicóticos/efeitos adversos , Basófilos/metabolismo , Citocinas/metabolismo , Hipersensibilidade a Drogas/etiologia , Hipersensibilidade a Drogas/fisiopatologia , Liberação de Histamina , Humanos , Hipersensibilidade Tardia/induzido quimicamente , Hipersensibilidade Tardia/fisiopatologia , Hipersensibilidade Imediata/induzido quimicamente , Hipersensibilidade Imediata/fisiopatologia , Hipnóticos e Sedativos/administração & dosagem , Hipnóticos e Sedativos/efeitos adversos , Imunoglobulina E/imunologia , Infusões Intravenosas , Complicações Intraoperatórias/induzido quimicamente , Complicações Intraoperatórias/fisiopatologia , Subpopulações de Linfócitos/imunologia , Mastócitos/metabolismo , Modelos Imunológicos , Fármacos Neuromusculares não Despolarizantes/administração & dosagem , Fármacos Neuromusculares não Despolarizantes/efeitos adversos , Medicação Pré-Anestésica , Triptases/metabolismoRESUMO
BACKGROUND: beta-lactams continue to remain the most commonly involved drug family in allergic drug reactions. They are often essential and there is a cost-effective and favourable risk-benefit ratio for the exploration of all suspicions of beta-lactam allergy. A firm diagnosis is always based on skin tests and sometimes on provocation tests. Recommendations have been published by allergy societies and distinguished scientists but they are not always concordant and can lead to some confusion for the practicing allergologist. The situation has even worsened since the world wide withdrawal of these penicillin determinants and since the predominance of amoxicillin and cephalosporin prescriptions in most countries. OBJECTIVE - METHOD: In a recent article, it was stated that patients with a penicillin allergy history and negative skin tests to major and minor penicillin determinants are at a low risk of relapse (0-5%) when receiving a beta-lactam. In this paper, our Drug Allergy and Hypersensitivity Database, a cohort database, was used to demonstrate that this statement is false. Standardized European Network for Drug Allergy questionnaires, skin test and challenge procedures were followed. RESULTS: One-thousand two-hundred and eighteen subjects, 69.8% of female, 51.7% of atopics, were included. 21.1% had a true beta-lactam allergy confirmed by skin tests (178, 69.3%) or by drug provocation (79, 30.7%). 17.4% of the patients with negative skin tests to major and minor penicillin determinants were positive for a beta-lactam. CONCLUSION: In the diagnosis of beta-lactams allergy, if all skin tests are negative, skin tests with other determinants and provocation tests under strict surveillance are mandatory.
Assuntos
Hipersensibilidade/diagnóstico , Hipersensibilidade/imunologia , beta-Lactamas/administração & dosagem , beta-Lactamas/imunologia , Administração Oral , Adolescente , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Testes CutâneosRESUMO
INTRODUCTION: Mucormycosis is a rare opportunistic fungal infection due to filamentous fungi of the order Mucorales in the class Zygomycetes. Rhino-cerebral and pulmonary manifestations predominate on account of the airborn spread of the spores. Gastro-intestinal, cutaneous and disseminated disease is less common. The principal risk factors are immuno-suppression and diabetic keto-acidosis. CASE REPORTS: One case of fatal pulmonary mucormycosis and two cases of colonisation illustrate both the extreme severity of this disease and the diagnostic difficulties facing the physician. The ubiquitous nature of the organism leads to frequent colonisation and, moreover, the symptomatology readily mimics that of invasive pulmonary aspergillosis. The diagnosis of mucormycosis can only be confirmed by pathological and mycological examination of biopsy specimens. These requirements conflict with the need for urgent treatment with surgical debridement, amphotericin B and control of the underlying pathology. Sadly the mortality remains very high, between 50 and 80% in published series. CONCLUSION: Currently there is hope of new therapeutic approaches with posaconozole but the ineffectiveness of voriconozole and the echinocandines, used more and more against aspergillus, raises the possibility of an increase in mucormycosis by selection.