scholarly journals Larvicidal activity of aqueous extracts of Ilex paraguariensis and Ilex theezans on Aedes aegypti (L.)

2020 ◽  
Vol 42 ◽  
pp. e3
Author(s):  
Ana Carla Knakiewicz ◽  
Junir Antonio Lutinski ◽  
Maria Assunta Busato ◽  
Walter Antônio Roman Junior ◽  
Daniel Albeny Simões
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Zika Virus ◽  
Ilex Paraguariensis ◽  
Mosquito Larvae ◽  
Yerba Mate ◽  
Aqueous Extracts ◽  
Plant Variation ◽  
Chikungunya Fever ◽  
Controlled Conditions

Aedes aegypti is the main vector of Dengue, Yellow Urban Fever, Chikungunya fever and Zika virus fever. The strategies for its control include synthetic products that cause damage to the environment and other organisms. This study evaluated the larvicidal activity of aqueous extracts of leaves and fruits of Ilex paraguariensis and Ilex theezans on Aedes aegypti mosquito larvae. The bioassays were conducted at the Ecological Entomology Laboratory, Unochapecó, under controlled conditions of temperature and photoperiod. The extracts of fresh and dried leaves of I. theezans showed greater larvicidal activity when compared to extracts of fruits of the same plant. Variation in larvicidal activity was also observed during exposure periods. The results suggest the use of extracts of these plants in the control of A. aegypti and the prospection of substances that can be used as an alternative to synthetic products. They point to the possibility of using yerba mate tissues that are not used commercially.

The Antioxidant Capacity of Aqueous Extracts from Yerba Mate (Ilex paraguariensis)

BIOPHYSICS ◽  
2021 ◽  
Vol 66 (1) ◽  
pp. 125-132
Author(s):  
Yu. O. Teselkin ◽  
I. V. Babenkova ◽  
L. A. Pavlova ◽  
A. Lee ◽  
A. A. Kochetova ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Ilex Paraguariensis ◽  
Yerba Mate ◽  
Aqueous Extracts

scholarly journals Larvicidal Activity in vivo of Ethanolic and Aqueous Extracts From Moringa (Moringa oleifera Lam.) on Aedes aegypti L. (Diptera: Culicidae)

2019 ◽  
Vol 11 (8) ◽  
pp. 129
Author(s):  
Antonio Carlos Leite Alves ◽  
Toshik Iarley da Silva ◽  
Francisco Roberto de Azevedo ◽  
Estelita Pereira Lima ◽  
Renata Rocha Virgulino ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Moringa Oleifera ◽  
Chemical Constituents ◽  
Control Treatment ◽  
Control Group ◽  
Distilled Water ◽  
Aqueous Extracts ◽  
Extract Concentration

The insecticides properties of Moringa oleifera (moringa) were evaluated in Aedes aegypti larvae, throughout an entirely randomized trial, represented by ethanolic and aqueous extracts obtained from leaves, flowers, barks, seeds and moringa roots, besides the control group. Five batches of 10 in 3rd stadium larvae were distributed in distilled water, added an extract concentration of 50 mL L-1, and the control treatment (distilled water). The test reading was measured after 24, 48 and 72 hours after larvae exposure, were considered dead those who did not respond to a mechanical stimulation of a clamp. The seed ethanolic extract produced the best performance after 24 hours (34% mortality), but after 48 hours, the flower extract was the more potent (38% mortality). The largest larvicidal activity was observed with the extract concentration of 90 mL L-1. The results indicate that moringa has larvacides properties against Aedes, but its chemical constituents need to be isolated and tested separately to enhance your larvicidal activity.

scholarly journals Chemometric modeling of larvicidal activity of plant derived compounds against zika virus vectorAedes aegypti: application of ETA indices

RSC Advances ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 4662-4670 ◽  
Author(s):  
Priyanka De ◽  
Rahul B. Aher ◽  
Kunal Roy
Keyword(s):  
Public Health ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Zika Virus ◽  
Qsar Model ◽  
Health Concerns

Dengue, zika and chikungunya have severe public health concerns in several countries. We have developed here a QSAR model for larvicidal activity of plant derived compounds against the vectorAedes aegypti.

scholarly journals Antioxidant potential of yerba mate (Ilex paraguariensis St. Hil.) extracts in Saccharomyces cerevisae deficient in oxidant defense genes

2016 ◽  
Vol 76 (2) ◽  
pp. 539-544 ◽  
Author(s):  
A. C. Piovezan-Borges ◽  
C. Valério-Júnior ◽  
I. L. Gonçalves ◽  
A. A. Mielniczki-Pereira ◽  
A. T. Valduga
Keyword(s):  
Oxidative Stress ◽  
Saccharomyces Cerevisiae ◽  
Hydrogen Peroxide ◽  
Antioxidant Defense ◽  
New Products ◽  
Antioxidant Potential ◽  
Ilex Paraguariensis ◽  
Yerba Mate ◽  
Aqueous Extracts ◽  
Defense Genes

Abstract Yerba-mate (Ilex paraguariensis St. Hil) is mainly consumed as “chimarrão”, a hot drink highly appreciated in Brazil, Argentina, Paraguay and Uruguay. This study evaluated the antioxidant potential of aqueous extracts of I. paraguariensis precipitated with ethanol. The leaves were processed as for tea product (TM) and oxidized (OX). The antioxidant potential was evaluated in cells of Saccharomyces cerevisiae deficient in antioxidant defense genes. Three strains evaluated were: a wild (EG) and two mutants (ctt1Δ e ctt1Δsod1Δ). These strains were pre-treated with the yerba-mate extracts (TM e OX) and submitted to oxidative stress induced by hydrogen peroxide. None of the extracts produced loss of cell viability. The extracts exerted antioxidant activity, protecting the strains (except sod1∆ctt1∆). The TM extract was more effective than OX. I. paraguariensis extracts showed a potential to be explored in the development of new products.

scholarly journals GESTÃO DOS PNEUS INSERVÍVEIS E SUA CONTRIBUIÇÃO PARA O PROGRAMA DE PREVENÇÃO À DENGUE, FEBRE CHIKUGUNYA E ZIKA VÍRUS NO MUNICÍPIO DE CHAPECÓ (SC)

2018 ◽  
Vol 7 (1) ◽  
pp. 129-143
Author(s):  
Junir Antônio Lutinski ◽  
Suiane Oliveira De Quadros ◽  
Jessica Tiburski ◽  
Cleia De Fátima Bedim
Keyword(s):  
Public Health ◽  
Health Promotion ◽  
Aedes Aegypti ◽  
Zika Virus ◽  
Health Surveillance ◽  
Chikungunya Fever ◽  
Breeding Sites ◽  
Waste Tires ◽  
Urban Solid Waste ◽  
The Relationship

O potencial dos pneus inservíveis como criadouros para o mosquito Aedes aegypti, vetor da Dengue, febre Chikungunya e Zika vírus, é amplamente conhecido. Este estudo teve como objetivos descrever a gestão dos pneus inservíveis no município de Chapecó e avaliar relação entre o número de pneus destinados à Reciclanip e o número de focos de A. aegypti registrados em pneus. A coleta de dados foi realizada no período de maio a agosto de 2016 e teve como base o período de 2010 a 2015. Dados foram obtidos no sitio eletrônico da DIVE/SC e junto ao setor de Vigilância em Saúde Ambiental do município de Chapecó. A quantidade de pneus inservíveis recebidos pelo ecoponto triplicou no período avaliado. A correlação entre a gestão ambientalmente correta dos pneus inservíveis e o número de focos de A. aegypti foi negativa (r = -0,79) e significativa (p0,05). Os resultados encontrados permitem inferir que a gestão ambientalmente correta dos pneus inservíveis contribui positivamente para a promoção da saúde pública, na prevenção da Dengue, febre Chikungunya e Zika vírus.Palavras-chave: Gestão de resíduos. Logística reserva. Promoção da saúde. Resíduos sólidos urbanos. ABSTRACT: The potential of waste tires as breeding sites for the Aedes aegypti mosquito, Dengue, Chikungunya fever and Zika virus vector, is widely known. The aim of this study was to describe the management of waste tires in the municipality of Chapecó and to evaluate the relationship between the number of tires destined for Reciclanip and the number of A. aegypti outbreaks recorded in tires. Data collection was performed from May to August 2016 and was based on the period from 2010 to 2015. Data were obtained from the DIVE/SC website and from the Environmental Health Surveillance sector of Chapecó municipality. The amount of waste tires received by the ecopoint tripled in the evaluated period. The correlation between the environmentally correct management of the waste tires and the number of A. aegypti outbreaks was negative (r = -0.79) and significant (p 0.05). The results found allow to infer that the environmentally correct management of waste tires contributes positively to the promotion of public health in the prevention of Dengue, Chikungunya fever and Zika virus.Keywords: Waste management. Reserve logistics. Health promotion. Urban solid waste.

scholarly journals Screening for larvicidal activity of ethanolic and aqueous extracts of selected plants against Aedes aegypti and Aedes albopictus larvae

2016 ◽  
Vol 4 (2) ◽  
pp. 143-147
Author(s):  
Michael Russelle Alvarez ◽  
◽  
Francisco Heralde ◽  
Noel Quiming ◽  
◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Aedes Albopictus ◽  
Aqueous Extracts

scholarly journals Larvicidal Activity of Isoflavonoids from Muellera Frutescens Extracts Against Aedes Aegypti

2012 ◽  
Vol 7 (10) ◽  
pp. 1934578X1200701
Author(s):  
Charlotte Nirma ◽  
Alice M S. Rodrigues ◽  
Charlie Basset ◽  
Lionel Chevolot ◽  
Romain Girod ◽  
...  
Keyword(s):  
Biological Activity ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Environmentally Friendly ◽  
Bark Extract ◽  
Mosquito Larvae ◽  
Toxic Activity ◽  
Renewable Source ◽  
Environmentally Safe ◽  
Hexane Extracts

The biological activity of extracts from the leaves, bark and roots of Muellera frutescens, an Amazonian ichtyotoxic plant, were evaluated to find new environmentally safe insecticides. The n-hexane extracts of bark, leaf, and root showed a strong toxic activity against Aedes aegypti mosquito larvae. Bioguided fractionation of the bark extract led to the isolation of seven isoflavonoids (12a-hydroxyelliptone, elliptone, (-)-variabilin, rotenone, rotenolone, tephrosin and deguelin). Rotenone and deguelin are responsible for the larvicidal activity of the plant. M. frutescens leaves contain up to 0.6%, w/w, deguelin. These results justify the traditional ichtyotoxic use of M. frutescens. The leaves contain a relatively high proportion of deguelin and, therefore, can be considered as a renewable source of this environmentally friendly insecticidal isoflavonoid.

Aqueous Extracts of Yerba Mate (Ilex paraguariensis) as a Natural Antimicrobial against Escherichia coli O157:H7 in a Microbiological Medium and pH 6.0 Apple Juice

2012 ◽  
Vol 75 (4) ◽  
pp. 753-757 ◽  
Author(s):  
KELLIE P. BURRIS ◽  
P. M. DAVIDSON ◽  
C. NEAL STEWART ◽  
S. ZIVANOVIC ◽  
F. M. HARTE
Keyword(s):  
Escherichia Coli ◽  
Apple Juice ◽  
Ilex Paraguariensis ◽  
South American ◽  
Yerba Mate ◽  
Escherichia Coli O157 ◽  
Aqueous Extracts ◽  
Natural Antimicrobial ◽  
E Coli ◽  
Log Reduction

Ilex paraguariensis is popularly used in the preparation of a tea infusion (yerba mate), most commonly produced and consumed in the South American countries of Uruguay, Paraguay, Argentina, and Brazil. In this study, aqueous extracts of commercial tea, derived from the holly plant species I. paraguariensis were evaluated for their ability to inhibit or inactivate Escherichia coli O157:H7 in a microbiological medium and modified apple juice. Dialyzed, lyophilized aqueous extracts were screened for antimicrobial activity against E. coli O157:H7 strains ATCC 43894 and ‘Cider’ in tryptic soy broth (TSB) and apple juice (adjusted to pH 6.0 to allow for growth of the bacterium). A mixture of the two strains was used as the inoculum when apple juice was used as the medium. MBCs were determined to be ca. 5 and 10 mg/ml for ATCC 43894 and ‘Cider’, respectively, in TSB. Higher concentrations of the extract were required to inactivate E. coli O157:H7 in pH-adjusted apple juice. An approximate 4.5-log reduction was observed for E. coli O157:H7 treated with 40 mg/ml extract. It was concluded that aqueous extracts from commercial yerba mate have potential to be used as antimicrobials in foods and beverages against pathogenic E. coli O157:H7.

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