R. A. Lima

Atividade inseticida do extrato das folhas de Piper hispidum (Piperaceae) sobre a broca-do-café (Hypothenemus hampei)

Este trabalho teve como objetivo avaliar o potencial inseticida do extrato acetonico das folhas de Piper hispidum Kunth sobre Hypothenemus hampei (Ferrari, 1867) em aplicacao topica, superficie contaminada e efeito de repelencia. Adotou-se as diluicoes de 25,0; 5,0; 0,1; 0,02; 0,004 e 0,0008 mg mL-1 para exposicao em superficie contaminada e aplicacao topica. No teste de repelencia, utilizou-se a diluicao 0,5 mg mL-1 do extrato. As avaliacoes foram realizadas nas 48 horas apos a exposicao ao extrato. Na exposicao em superficie contaminada, obteve-se 100% de mortalidade, na diluicao 25,0 mg mL-1, e de 50 a 80% nas diluicoes 0,004 a 5,0 mg mL-1, enquanto 0,0008 mg mL-1 e o controle resultaram em apenas 5% de mortalidade. Na aplicacao topica, atingiu-se 60 a 65% de mortalidade, com as diluicoes de 0,1 a 25,0 mg mL-1. As diluicoes de 0,2 a 0,0008 mg mL-1 nao diferiram do controle. Os indices de repelencia foram inferiores ao valor minimo preconizado na literatura para se considerar uma substância como repelente. Este estudo evidencia a atividade inseticida do extrato de folhas de P. hispidum sobre H. hampei, o que sugere seu potencial no controle deste inseto.

Composição química e atividade inseticida do óleo essencial de Schinus terebinthifolius Raddi (Anacardiaceae) sobre a broca-do-café (Hypothenemus hampei) Ferrari

The essential oil from the leaves of Schinus terebinthifolius was obtained by hydrodistillation and was analyzed by GC-MS. The oil yield was 0.8%, and 37 chemical constituents were identified. The main components were germacrene D (25.0%), (E)-β-cariophyllene (17.5%) and δ-elemene (10.5%). The essential oil was diluted in acetone in concentrations of 10-2 to 10-8 and it was applied to insects (Hypothenemus hampei) by topical application and exposure to contaminated surface. Mortality rates were evaluated after 24 and 48 hours. The contaminated surface application resulted in 25.0% of mortality in control while the dilutions of 10-2 to 10-8 resulted in 100% to 30.0% of mortality respectively. In the topical application, it was observed 27.5% of mortality in control and 97.5 to 77.5% of mortality in dilutions of 10-2 to 10-8.

Granuloma faciale: a good therapeutic response with the use of topical tacrolimus

Granuloma faciale is a rare dermatosis of chronic course, benign, usually asymptomatic, first described in 1945 by Wingley. It is characterized by the appearance of well-defined, single or multiple papules, plaques and nodules, predominantly located in sun-exposed areas, especially the face. In this work we report the case of a female patient, 58 years old, evolving for ten years with multiple erythematous-brownish and asymptomatic papules on the face, whose histological examination confirmed the diagnosis of granuloma faciale. The patient was treated with topical tacrolimus, evolving with regression of lesions.

Livedoid vasculopathy as a marker of systemic disease: report of two cases

The livedoid vasculopathy is an obstructive vascular process of etiology not yet fully known, being possibly associated with several prothrombotic events. It is clinically characterized by the presence of painful and recurring purpuric lesions, which usually suffer ulceration and evolve with formation of white atrophic scars usually located in the lower limbs. Two cases are here reported of painful ulcerated lesions on the lower limbs, in which the identification of VL enabled the diagnosis of systemic diseases.

Bullous and hemorrhagic lichen sclerosus - Case report

Lichen sclerosus is a chronic inflammatory disease, usually located in the genital area. The etiology of lichen sclerosus is multifactorial, with participation of genetic, autoimmune, infectious and hormonal factors. Bullous clinical form stems from hydropic degeneration of the basal membrane, constituting a less frequent variant of the disease. In this work, we report the case of a female patient, 55 years old, who in the last three years presented whitish plaques, with horny spikes, located on back and arms. Some of these lesions evolved with hemorrhagic blisters, which after histopathological examination confirmed the diagnosis of bullous and hemorrhagic lichen sclerosus. The patient was treated with high-potency topical corticosteroid for two months, resulting in remission of bullous and hemorrhagic lesions.