English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Infectious diseases are always a concern, since the effectiveness of several antimicrobials in certain situations has decreased due to the microbial resistance developed over the years. Research in the area of antimicrobial drug development has been  intensified in recent decades. The objective of this work was to verify in vitro the antimicrobial activity of hydroalcoholic extracts of lemongrass, rosemary and arnica. Bacteria used in the test were S. aureus, K. pneumoniae and E.coli. The extracts were obtained from the plants dry leaves  in maceration with 70% cereal alcohol for seven days. The total soluble solids concentration of each extract was obtained by gravimetry. The extracts antimicrobial activity  was obtained by the pour-plate technique, in which the colonies were counted. Under the conditions in which the tests were performed in the stage of microbial growth was observed with lemongrass and rosemary extracts, and the stage rate was zero. However, S. aureus was sensitive to the arnica  hydroalcoholic extract  in the concentration of 4.00 mg / mL with inhibition rate of 100%, reducing as the extract concentration was lower. At different concentrations, the  arnica hydroalcoholic extract  had a low inhibitory capacity for K. pneumoniae and E. coli. The plants antimicrobial activity varies greatly in relation to the botanical characteristics (cultivation, soil, harvest) and the extraction method (solvents of different polarities and techniques), for that reason, there are many varied results in several  studies. Therefore, many studies are needed to confirm the antimicrobial efficacy of plant strata. Keywords: Anti-Infective Agents. Phytochemicals. Microbial sensitivity tests. ResumoAs doencas infecciosas sao sempre preocupantes, pois a eficacia de varios antimicrobianos em certas situacoes, diminuiu em funcao da resistencia microbiana, desenvolvida ao longo dos anos. As pesquisas na area de desenvolvimento de farmacos antimicrobianos, intensificaram-se muito nas ultimas decadas. O objetivo desse trabalho foi verificar in vitro a atividade antimicrobiana de extratos hidroalcoolicos de capim-limao, alecrim e arnica. As bacterias utilizadas no teste foram S. aureus, K. pneumoniae e E.coli. Os extratos foram obtidos das folhas secas das plantas, em maceracao com alcool cereal a 70%, durante sete dias. A concentracao de solidos soluveis totais de cada extrato foi obtida por gravimetria. A atividade antimicrobiana dos extratos foi obtida pela tecnica pour-plate, em que se procedeu a contagem de colonias. Nas condicoes em que os testes foram realizados nao foram observados inibicao do crescimento microbiano com os extratos de capim-limao e alecrim, sendo a taxa de inibicao zero. Entretanto, o S. aureus mostrou-se sensivel ao extrato hidroalcoolico de arnica na concentracao de 4,00mg/mL com taxa de inibicao de 100%, reduzindo conforme a concentracao do extrato era menor. Nas diferentes concentracoes, o extrato hidroalcoolico de arnica, apresentou uma baixa capacidade inibitoria para a K. pneumoniae e E.coli. A atividade antimicrobiana das plantas varia muito em relacao as caracteristicas botânicas (cultivo, solo, colheita) e ao metodo de extracao (solventes de polaridades diferentes e tecnicas), por essa razao, ha resultados bem variados nas diversas pesquisas. Assim sendo, muitos estudos sao necessarios para confirmar a eficacia antimicrobiana dos extratos vegetais. Palavras-chave: Anti-Infecciosos. Compostos Fitoquimicos. Testes de Sensibilidade Microbiana.

journal of health sciences

Antimicrobial Action of Hydroalcoholic Extract from Cymbopogonous citrus Staupf (capim-limão), Rosmarinus officinalis L (alecrim) and Lychnophora ericoides (arnica)