Phenotypic detection of quorum sensing inhibition in pyoverdine and swarming by volatile organic products.

To determine phenotypically the anti quorum-sensing (QS) activity of 30 volatile organic products (VOPs) through the inhibition of swarming motility and pyoverdine production in . Twenty-four essential oils and six small volatile organic compounds randomly selected were screened for their anti-QS activity by violacein inhibition on . The VOPs with positive results were subsequently evaluated for swarming motility and pyoverdine production on determining the colony diameter and fluorescence under UV light, respectively.

Bioguided identification of antimicrobial compounds from (L.) Roberty root essential oil.

To determine the group of compounds from root essential oil that have antimicrobial activity. Thin-layer chromatography coupled to direct bioautography was used to determinate the fraction(s) having antimicrobial activity against methicillin-resistant  (MRSA) and vancomycin-resistant (VREF). Through GC-MS identification, the fractions with the greatest similarity to the active thin-layer chromatography fraction were used to determinate the MIC.

[Seroprevalence of anti-rubella and anti-cytomegalovirus IgG antibodies in women aged between 16 and 40 years, living in Tunja, Colombia].

Objective: To determine the seroprevalence of anti-rubella and anti-cytomegalovirus IgG antibodies in a group of women aged between 16 and 40 years, residents of Tunja.

Methods: Descriptive, cross-sectional research in women aged between 16 and 40 years included by means of non- probability sampling for convenience. Sociodemographic variables were recorded by applying a survey.

Antibacterial and antifungal properties of crude extracts and isolated compounds from .

Antimicrobial activity of dichloromethane and ethanol extracts and five compounds: pinostrobin (I), pinocembrin (II), tectochrysin (III), galangin 3-methyl ether (IV) and tiliroside (V) isolated from aerial parts against fifteen microorganisms was determined. The structures of these compounds were elucidated based on ESI-MS and NMR spectroscopic data. Both extracts showed antimicrobial activity against several tested microorganisms.

Mouthwash containing Croton doctoris essential oil: in vitro study using a validated model of caries induction.

Aim: To validate an in vitro caries model and to evaluate an experimental mouthwash containing Croton doctoris essential oil.  Materials & methods: To validate the experimental model, we used McBain medium and polymicrobial biofilms. The EOM (essential oil mouthwash) was tested using the validated model.