CHARACTERIZATION AND ANALYSIS OF THE BIOACTIVITY OF THE Piper rivinoides Kunth ESSENTIAL OIL AND ITS COMPONENTS MYRISTICIN AND ELEMICIN, AGAINST OPPORTUNISTIC FUNGAL PATHOGENS.

Candidiasis is an infectious disease caused by some fungi of the genus Candida. In Brazil, the incidence rate is higher than in European countries and the United States, and health problems occur mainly due to the virulence factors of the fungi, which have made treatment with commercial drugs difficult. Considering the context, plants rich in phenolic compounds, such as those of the genus Piper, have been studied due to their antimicrobial properties.

Inhibition of the morphological transition of Candida spp. by riparins I-IV.

Candida spp. is an opportunistic pathogen capable of causing superficial to invasive infections. Morphological transition is one of the main virulence factors of this genus and, therefore, is an important variable to be considered in pharmacological interventions.

In vitro Evaluation of Fungal Susceptibility and Inhibition of Virulence by Diosgenin.

Fungal infections are a public health problem that mainly affects immunosuppressed people, Candida spp. have been responsible for most sources of contamination and invasive fungal infections described around the world. The need arises to find new therapeutic approaches to combat growing infections.

Chemical composition and antimicrobial potential of Acrocomia aculeata (Jacq.) Lodd. ex Mart. and Syagrus cearensis Noblick (Arecaceae).

This study aimed to evaluate the antibiotic effects of the fixed oils of Acrocomia aculeata (FOAA) and Syagrus cearenses (FOSC) against the bacterial strains and the fungi strains of the genus Candida spp. The method of serial microdilution using different concentrations was used for measuring the individual biological activity of the fixed oils. The fixed oil of A.

Synthesis of chalcones and their antimicrobial and drug potentiating activities.

The increased resistance of microorganisms to antimicrobial drugs makes it necessary to search for new active compounds, such as chalcones. Their simple chemical structure makes them molecules easy to synthesize. Therefore, the aim of this study was to evaluate the antimicrobial and potentiating activity of antibiotics and antifungals by synthetic chalcones against strains of Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans and Candida tropicalis.

Antibiotic-Potentiating Activity of the Raddi Essential Oil against MDR Bacterial Strains.

, , and are the primary bacteria that cause clinical infections, such as urinary and intestinal infections, pneumonia, endocarditis, and sepsis. Bacterial resistance is an innate natural occurrence in microorganisms, resulting from mutations or the lateral exchange of genetic material. This serves as evidence for the association between drug consumption and pathogen resistance.

Antifungal effect of the liposome encapsulation of the Trans- Caryophylene and its association with fluconazole.

Trans-Caryophyllene (TC), a sesquiterpene, with proven biological activities, which in this work was tested alone, encapsulated in liposomes and associated with Fluconazole in vitro in an attempt to enhance the effect of the drug. Liposomes were characterized from vesicle size, polydispersity index, and Zeta potential, and imaging by scanning electron microscopy. Antifungal assays were performed against Candida albicans, Candida tropicalis and Candida krusei by microdilution to determine the IC values and the viability curve.

LC-MS Analysis and Antifungal Activity of Sm.

Fungi of the genus are responsible for invasive candidiasis, which affects people all over the world and has high mortality rates. This is due to their virulence factors, which give them great resistance and pathogenicity. In addition, the emergence of multidrug-resistant strains makes it difficult to treat these infections.

UPLC-MS-ESI-QTOF Analysis and Antifungal Activity of Aqueous Extracts of .

This study aimed to identify the chemical composition of the aqueous leaf and root extracts (EALST and EARST) and to evaluate their effect, comparatively, against opportunistic pathogenic fungi. Ultra-Performance Liquid Chromatography Coupled to a Quadrupole/Time of Flight System (UPLC-MS-ESI-QTOF) was employed for chemical analysis. and standard strains and clinical isolates were used (CA INCQS 40006, CT INCQS 40042, CA URM 5974, and CT URM 4262).

Phytochemical Analysis, Antibacterial Activity and Modulating Effect of Essential Oil from (L.) Skeels.

One of the main global problems that affect human health is the development of bacterial resistance to different drugs. As a result, the growing number of multidrug-resistant pathogens has contributed to an increase in resistant infections and represents a public health problem. The present work seeks to investigate the chemical composition and antibacterial activity of the essential oil of leaves.

HPLC-DAD analysis and antimicrobial activities of L. (Anacardiaceae).

is used in the folk medicine for the treatment of diarrhea and dysentery, indicating that extracts obtained from this species may present pharmacological activities against pathogenic microorganisms. The purpose of this work was to investigate the chemical composition and evaluate the antimicrobial activity of extracts obtained from the leaves (aqueous) and bark (hydroethanolic) of both as single treatments and in combination with conventional drugs. Following a qualitative chemical prospection, the extracts were analyzed by HPLC-DAD.

Evaluation of the antifungal activity of α, β, and δ-damascone and inclusion complexes in β-cyclodextrin against Candida spp.

Due to the increase in fungal resistance to existing drugs, a need exists to search for new antifungals. This study aimed to evaluate the antifungal activity of α, β, and δ-damascone and inclusion complexes with β-cyclodextrin against different Candida spp. The inclusion complex of β-damascone was prepared by the co-evaporation method using three molar proportions (1:1; 2:1; 3:1 (βDA-βCD)) and analyzed using Fourier transform infrared spectroscopy (FTIR).

Antibacterial and modulatory activities of β-cyclodextrin complexed with (+)-β-citronellol against multidrug-resistant strains.

The present study aimed to investigate the antibacterial and modulatory activities of (+)-β-citronellol (βCT), β-cyclodextrin (β-CD), and their complex βCT/β-CD and characterize them using infrared spectroscopy. Infrared spectra were recorded in the 750-4000 cm region. The antibacterial effects of these compounds and their modulatory-antibiotic activities were determined using the minimum inhibitory concentration (MIC) test.

Antifungal activity of farnesol incorporated in liposomes and associated with fluconazole.

Candida infections represent a threat to human health. Candida albicans is the main causative agent of invasive candidiasis, especially in immunosuppressed patients. The emergence of resistant strains has required the development of new therapeutic strategies.

Antifungal Properties of Nerolidol-Containing Liposomes in Association with Fluconazole.

(1) Background: Infections by species represent a serious threat to the health of immunocompromised individuals. Evidence has indicated that nerolidol has significant antifungal properties. Nonetheless, its use is restricted due to a low water solubility and high photosensitivity.

In vitro Antibiotic and Modulatory Activity of (L.) Kuntze against strains.

The emergence of fungal resistance to commercial drugs has been a major problem for the WHO. In this context, research with natural products is promising in the discovery of new active substances. Thus, this work evaluated the antifungal effect of a medicinal plant (i.

Effect of α-Bisabolol and Its β-Cyclodextrin Complex as TetK and NorA Efflux Pump Inhibitors in Strains.

Efflux pumps are proteins present in the plasma membrane of bacteria, which transport antibiotics and other compounds into the extracellular medium, conferring resistance. The discovery of natural efflux pump inhibitors is a promising alternative. α-Bisabolol is a sesquiterpene isolated from several plants such as L.

Evaluation of the Antifungal Activity of the Leaf Ethanolic Extract against Biofilms Formed by Sp. Isolates in Acrylic Resin Discs.

sp. treatment has become a challenge due to the formation of biofilms which favor resistance to conventional antifungals, making the search for new compounds necessary. The objective of this study was to identify the composition of the Benth.

UPLC-MS-ESI-QTOF Analysis and Antifungal Activity of the Arruda Leaf and Root Hydroalcoholic Extracts.

The aim of this study was to identify and evaluate the chemical compositions and effects of the leaf and root hydroalcoholic extracts (HELST and HERST) against different strains of . Chemical analysis was performed by Ultra-Performance Liquid Chromatography Coupled to Quadrupole/Time of Flight System (UPLC-MS-ESI-QTOF). The Inhibitory Concentration of 50% of the growth (IC as well as the intrinsic and combined action of the extracts with the antifungal fluconazole (FCZ) were determined by the microdilution method while the minimum fungicidal concentrations (MFCs) and the effect on fungal morphological transitions were analyzed by subculture and in humid chambers, respectively.

GC/MS analysis and antimicrobial activity of the Piper mikanianum (Kunth) Steud. essential oil.

The Piper mikanianum species were investigated by the antimicrobial potential and chemical composition. Chemical analysis was performed by gas chromatography coupled to mass spectrometry (GC/MS). The Minimum Inhibitory Concentration (MIC) as well as the 50% Inhibitory Concentration against Candida strains were determined by microdilution.

Chemical composition, antimicrobial, modulator and antioxidant activity of essential oil of Dysphania ambrosioides (L.) Mosyakin & Clemants.

The oil presented the α-Terpinene as the major compound with 54.09% presence. Antibacterial activity demonstrated significant MIC against Staphylococcus aureus (256 μg/mL) and moderate against Pseudomonas aeruginosa (512 μg/mL).

Chemical composition and anti-Candida potencial of the extracts of Tarenaya spinosa (Jacq.) Raf. (Cleomaceae).

Phytochemical prospecting was performed by HPLC-DAD. The Inhibitory Concentration of 50% of mortality the microorganisms (IC) was determined and a cell viability curve was obtained. Minimum Fungicidal Concentration (MFC) was determined by subculture in Sabourad Dextrose Agar.

Analysis by UPLC-MS-QTOF and antifungal activity of guava (Psidium guajava L.).

Psidium guajava L. is a plant widely used for food and in folk medicine all over the world. Studies have shown that guava leaves have antifungal properties.

Chemical composition, antifungal activity and potential anti-virulence evaluation of the Eugenia uniflora essential oil against Candida spp.

The development of fungal resistance to antifungal drugs has been worsening over the years and as a result research on new antifungal agents derived from plants has intensified. Eugenia uniflora L. (pitanga) has been studied for its various biological actions.

Antibacterial, modulatory activity of antibiotics and toxicity from Rhinella jimi (Stevaux, 2002) (Anura: Bufonidae) glandular secretions.

The increase in microorganisms with resistance to medications has caused a strong preoccupation within the medical and scientific community. Animal toxins studies, such as parotoid glandular secretions from amphibians, possesses a great potential in the development of drugs, such as antimicrobials, as these possess bioactive compounds. It was evaluated Rhinella jimi (Stevaux, 2002) glandular secretions against standard and multi-resistant bacterial strains; the effect of secretions combined with drugs; and determined the toxicity using two biologic in vivo models, and a in vitro model with mice livers.