studies aimed at studying the mechanism of action of carvacrol and oregano as natural anti-bacterial agents to control multiple antibiotic-resistant avian pathogenic (APEC) strain O23:H52 isolated from chicken were performed. Derivatives with increased minimum inhibitory concentrations (MIC) to the phytochemicals were selected after growing () strain O23:H52 at sub-lethal concentrations of carvacrol and oregano for a period of 60 days. Whole-genome sequencing (WGS) of two derivatives revealed a missense mutation in and : the genes responsible for survival mechanisms and antibiotic resistance by efflux, respectively. studies aimed at studying the mechanism of action of carvacrol and oregano as natural anti-bacterial agents to control multiple antibiotic-resistant avian pathogenic (APEC) strain O23:H52 isolated from chicken were performed. Derivatives with increased minimum inhibitory concentrations (MIC) to the phytochemicals were selected after growing () strain O23:H52 at sub-lethal concentrations of carvacrol and oregano for a period of 60 days. Whole-genome sequencing (WGS) of two derivatives revealed a missense mutation in and : the genes responsible for survival mechanisms and antibiotic resistance by efflux, respectively.
: essential oil (OEO) is safe, effective, multifunctional, and widely used. This study aimed to evaluate OEO's chemical composition and antimicrobial activity in vitro against and . : The composition of OEO was determined by gas chromatography-mass spectrometry (GC-MS).
Research Centre for Livestock Environmental Control and Smart Production, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.
The benefits of plant essential oils (EO) on the health of animals have been frequently reported, but their alteration of lipid metabolism in obese pigs has yet to be explored. This study aimed to assess the impact of EO blends (oregano, cinnamon and lemon oils) on growth performance, meat physicochemical parameters, intestinal health and lipid metabolism in the small intestine of weaned Bamei (a kind of obese-type pig) piglets. One hundred and forty-four male 60-day-old weaned Bamei piglets were randomly assigned to three groups of six replicates each: CON (basal diet), T1 (basal diet + 250 mg/kg EO), and T2 (basal diet + 500 mg/kg EO) over 28 days.
Nowadays, eco-friendly extraction techniques are often used to develop natural plant extracts for commercial use. In the current investigation, Greek oregano () phenolic extracts from different cultivated accessions were recovered employing ultrasonic-assisted extraction (UAE), microwave-assisted extraction (MAE), and accelerated solvent extraction (ASE). The phytochemical profile of the oregano extracts, as determined by spectrophotometric and chromatographic techniques, as well as antioxidant activity (ABTS, DPPH, and FRAP assays), was used to compare the three extraction approaches.
Following a request from the European Commission, EFSA was asked to deliver a scientific opinion on the safety and efficacy of an essential oil from the flowering tops of (L.) Cav. (Spanish type origanum oil) when used as a sensory additive in feed and in water for drinking for all animal species.
