Avaliação da sensibilidade imediata de pacientes atopicos por meio de teste cutaneo de puntura (prick test) a extrato de traça-de-livro (Lepisma saccharina) padronizado em unidades biologicas / Evaluation of immediate sensitive to a biological Unit-Standardized extract of silverfish (Lepisma saccharina) in atopic patients by skin prick test

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

In Brazil, allergic patients with allergic rhinitis and/or asthma present sensibility for several aeroallergens mainly from house dust mites. Other potential sources of allergens like silverfish remain to be investigated as really allergenic and firmly related to respiratory allergic diseases. The aim of this study was investigate by skin prick test the immediate sensitivity to a biological unit-standardized extract of silverfish Lepisma saccharina in allergic patients. The standardization of the crude extract of L. saccharina whole bodies by biological units (BU) was performed with linear regression of skin prick test data from allergic patients and healthy volunteers. Skin prick tests were performed using commercial extracts of mites, cat and dog dander, cockroaches, house dust and the crude-extracts of L. saccharina at 5.000, 10.000 and 25.000 PNU/mL. After standardization, the silverfish extract at 100 BU/mL was prick-tested to evaluate silverfish sensitivity in allergic patients. Thirty-two allergic patients and 11 healthy volunteers were enrolled in silverfish extract standardization test. The histamine equivalent papule area of silverfish extract was calculated at the concentration of 29.336 PNU/mL. To investigate the sensitivity of silverfish standardized extract another 21 allergic patients and 16 healthy volunteers were studied. There were significant higher skin test positive results for D. pteronyssinus, B. tropicalis, Tyrophagus putrescentiae and house dust extracts in allergic patients than controls. The sensitivity of silverfish L. saccharina (100 BU/mL) standardized extract was 14.3% in allergic patients with 8.1% of general prevalence. The sensibility to standardized extract of silverfish in BU was considerate light in allergic patients

ASSUNTO(S)

sensibilidade insects inseto allergy alergia asma sensitivity asthma

ACESSO AO ARTIGO

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