Artigos
URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11847
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Item Screening of medicinal plants for antibacterial activities on Staphylococcus aureus strains isolated from bovine mastitis(Revista Brasileira de Farmacognosia, 2009-11-21) Diaz, Marisa A. N.; Rossi, Ciro C.; Mendonça, Vítor R.; Silva, Danielle M.; Ribon, Andréa de O. B.; Aguilar, Ananda P.; Muñoz, Gaspar D.Staphylococcus aureus is the main causative agent of bovine mastitis. The activity of several extracts from ten medicinal plants traditionally used in Brazil as antiseptic was investigated against fifteen strains of Staphylococcus aureus isolated from animals with mastitis manifestation by the disc diffusion method and broth microdilution assay. The interference of the extracts on cell in the form of adherent colonies was also evaluated. MIC values ranged from 0.5 mg/mL to 1.0 mg/mL and biofilm inhibitory concentration (BIC) were between 0.25 mg/mL and 0.8 mg/mL. Results revealed the potential of extracts of Senna macranthera, Artemisia absinthium, Cymbopogon nardus and Baccharis dracunculifolia as antibacterial agents against S. aureus strains isolated from bovine mastitis and support the possible use of these phytotherapic agents in the clinical management of the disease.Item Easy access to evans’ oxazolidinones. Stereoselective synthesis and antibacterial activity of a new 2-oxazolidinone derivative(Molecules, 2014-06-06) Diaz, Gaspar; Freitas, Michelle A. A. de; Ricci-Silva, Maria E.; Diaz, Marisa A. N.An interesting new approach was developed for the synthesis of Evans’ chiral auxiliaries with excellent yields. In turn, another new stereoselective and efficient strategy has also allowed for the preparation of a 2-oxazolidinone derivative in 34% overall yield from the Morita-Baylis-Hillman adduct. The antibacterial activity of this oxazolidinone was tested against Staphylococcus aureus strains isolated from animals with mastitis infections.