Plant extracts and their components as potential control agents against human head lice

Rossini, Cármen; Castillo, Lucía; González, Andrés

doi:10.1007/s11101-006-9026-0

Cited by 26 publications

(15 citation statements)

References 57 publications

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“…The infusion is used as a topic treatment for skin parasites like scabies and lice, while clinical investigations have shown prophylactic effects rather than insecticide activity [74,75]. These data are in agreement with studies on the mechanism of action of plant extracts, showing the inhibition of chitin production that prevents louse egg adhesion to hairs [76].…”

Section: Dermatologic and Cosmetic Usessupporting

confidence: 60%

Revisiting Amazonian Plants for Skin Care and Disease

Burlando

Cornara

2017

Cosmetics

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Abstract:This review concerns five species of trees and palm trees that occur as dominant plants in different rainforest areas of the Amazon region. Due to their abundance, these species can be exploited as sustainable sources of botanical materials and include Carapa guianensis Aubl., family Meliaceae; Eperua falcata Aubl., family Fabaceae; Quassia amara L., family Simaroubaceae; and Attalea speciosa Mart. and Oenocarpus bataua Mart., family Arecaceae. For each species, the general features, major constituents, overall medicinal properties, detailed dermatological and skin care applications, and possible harmful effects have been considered. The major products include seed oils from A. speciosa and C. guianensis, fruit oil from O. bataua, and active compounds such as limonoids from C. guianensis, flavonoids from E. falcata, and quassinoids from Q. amara. The dermatologic and cosmetic applications of these plants are growing rapidly but are still widely based on empiric knowledge. Applications include skin rehydration and soothing; anti-inflammatory, antiage, and antiparasite effects; hair care; burn and wound healing; and the amelioration of rosacea and psoriasis conditions. Despite a limited knowledge about their constituents and properties, these species appear as promising sources of bioactive compounds for skin care and health applications. An improvement of knowledge about their properties will provide added value to the exploitation of these forest resources.

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Section: Dermatologic and Cosmetic Usessupporting

confidence: 60%

Revisiting Amazonian Plants for Skin Care and Disease

Burlando

Cornara

2017

Cosmetics

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“…However, further increases in the polarity due to the addition of another oxygenated group or an acid function rendered these monoterpenes inactive. The authors discuss their results taking into account structural aspects of the compounds tested, and conclude that flat structures, compared to extended or bulky compounds, were more toxic toward adults, but not necessarily the best niticidal compounds (Rossini et al 2008;Priestley et al 2006). Yang et al (2005) reported that the pediculicidal constituents of Cinnamomum zeylanicum bark essential oil were identified as benzaldehyde, (E)-cinnamaldehyde, and linalool by GC/MS analysis.…”

Section: Discussionmentioning

confidence: 99%

Contact and fumigant toxicity of hexane flower bud extract of Syzygium aromaticum and its compounds against Pediculus humanus capitis (Phthiraptera: Pediculidae)

Bagavan¹,

Rahuman²,

Kamaraj³

et al. 2011

Parasitol Res

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The head lice, Pediculus humanus capitis De Geer is an obligate ectoparasite of humans that causes pediculosis capitis, a nuisance for millions of people worldwide, with high prevalence in children. P. humanus capitis has been treated by methods that include the physical remotion of lice, various domestic treatments, and conventional insecticides. None of these methods render complete protection, and there is clear evidence for the evolution of resistance and cross-resistance to conventional insecticides. Non-toxic alternative options are hence needed for head lice treatment and/or prevention, and natural products from plants are good candidates for safer control agents that may provide good anti-lice activity. The plant extracts are good and safe alternatives due to their low toxicity to mammals and easy biodegradability. The present study carried out the pediculocidal activity using the hexane flower bud extract of Syzygium aromaticum (Myrtaceae) against P. humanus capitis examined by direct contact and fumigant toxicity (closed- and open-container methods) bioassay. The chemical composition of S. aromaticum flower bud hexane extract was analyzed by gas chromatography-mass spectrometry. The major chemical constituent (58.79%) of flower bud hexane extract S. aromaticum was identified as chavibetol (5-allyl-2-methoxyphenol) by comparison of mass spectral data and retention times. The hexane extract of S. aromaticum was subjected to gas chromatography analysis, and totally 47 compounds were detected, of which chavibetol was predominantly present. The other major constituents present in the hexane extract were eugenol acetate (phenol,2-methoxy-4-(2-propenyl)-,acetate (15.09%), caryophyllene-(I1) (2,6,10,10-tetramethyl bicyclo [7.2.0] undeca-1,6-diene (13.75%), caryophyllene oxide (3.04%), 2,6,6,9-tetramethyl-1,4,8-cycloundecatriene (1.67%), and copaene (1.33%). The filter paper contact bioassay study showed pronounced pediculicidal activity in the flower bud hexane extract of S. aromaticum. The toxic effect was determined for every five in an 80-min treatment. The result showed percent mortality of 40, 82, and 100 at 5, 10, and 20 min, and the median lethal time (LT(50)) value was 5.83 (0.5 mg/cm(2)); 28, 82, and 100 at 5, 10, and 30 min. (LT(50) = 6.54; 0.25 mg/cm(2)); and 13, 22, 42, 80, and 100 at 5, 10, 20, 40, and 80 min (LT(50) = 18.68; 0.125 mg/cm(2)), respectively. The vapor phase toxicity was tested at 0.25 mg/cm(2). There was a significant difference in pediculicidal activity of S. aromaticum extract against P. humanus capitis between closed- and open-container methods. Adult mortalities were determined for every five in 60 min (closed method) and for every ten in 180 min (open method). The closed method showed the percent mortality was 45, 88, and 100 at 5, 10, and 15 min (LT(50) = 5.39), respectively. In the open-container method, the percent mortality was observed 5, 20, 47, 84, and 100 at 10, 20, 60, 120, and 180 min (LT(50) = 47.91), respectively. The mortality was more effective in the closed contai...

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“…A handful of fixed extracts and several EOs and their individual components have also been tested as contact pediculicides or fumigants. 66 There is also renewed interest in the use of EOs as anti-malarials in the form of biocidal (insect repellent) preparations against mosquitos and other arthropod vectors of human tropical diseases such as the common houseflies (Musca domestica), American and German cockroaches (Periplaneta americana, Blatella germanica), and oriental latrine/blowflies (Chrysomya megacephala) as well as biting, blood-sucking arthropods such as blackflies (Simulium spp. ), fleas (Xenopsylla cheopis), kissing bugs (Rhodnius spp., Triatoma infestans), body and head lice (Pediculus humanus humanus, P. humanus capitis), sandflies (Lutzomyia longipalpis, Phlebotomus spp.…”

Section: Plant Essential Oilsmentioning

confidence: 99%