Atividade acaricida contra ácaros Dermatophagoides pteronyssinus e D. farinae (Pyroglyphidae) de produto contendo óleos essenciais de Lavadula officinalis e Mentha piperita (Labiatae) / Acaricide activity against mite Dermatophagoides pteronyssinus and D. farinae (Pyroglyphidae) of na herbal product containg essential oils from Lavadula officinalis and Mentha piperita (Labiatae)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

House dust mites (HDM) are the greatest source of indoor allergens in Brazil, being closely implicated in respiratory allergic diseases such as asthma and rhinitis. In dwellings, HDM allergens are mainly found on mattresses, sofas and rug surfaces, where several methods such as mattress-covers and acaricides, can be used to control indoor mite infestation. The aim of this study was to evaluate the acaricide effect of an herbal product containing essential oils from Lavandula officinalis and Mentha piperita (Labiatae) against mites Dermatophagoides pteronyssinus and Dermatophagoides farinae (Pyroglyphidae). The acaricide effect of the Test-product was compared with several other chemical products in in vitro and clinical studies. The in vitro study was conducted using mite cultures, in which the chemical products were directly applied and in Petri dishes where a number of mites were placed in contact with the chemicals tested. Mite mortality was counted and used as comparison. The clinical study was conducted in 30 dwellings of atopic patients with asthma and/or rhinitis. The efficacy of the Test-product was compared with a Brazilian commercial acaricide and was done by ELISA quantification of the mite allergens Der p1 and Der f1 and by the number of body mites on dust collected from a mattress, sofa and rug treated with one of the products for 6 months. Clinical implications in allergic symptoms and the toxicity of the products for humans were also evaluated. The in vitro study showed that the acaricide effect of the Test-product was similar to that observed with the chemical products. In the clinical study, a significant decrease in Der p1 and Der f1 allergens concentrations were observed in all 3 treated sources. This decrease was similar to that observed with the commercial product used as control. Despite these results, the number of mite bodies on dust from all 3 sources presented no significant difference after the 6- months of treatment for both Test- and Control-products. Also, both products were considered safe for human use, since no significant adverse effects or toxicity signals were observed, although, atopic patients who were present in the room when the product was applied complained of respiratory symptoms. Our findings showed that the acaricide containing essential oils from Lavandula officinalis and Mentha piperita (Labiatae) has a significant in vitro effect against mites Dermatophagoides pteronyssinus and Dermatophagoides farinae (Pyroglyphidae) and caused a significant decrease in Der p1 and Der f1 levels on dust from treated mattresses, sofas and rugs. The product was considered safe for human use.

ASSUNTO(S)

Ácaro alergia antigenos imunologia mite allergy antigens immunology

ACESSO AO ARTIGO

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