Oregano essential oil (Origanum vulgare) to feed laying hens and its effects on animal health

Abstract

This study evaluated the effect of oregano essential oil added to the feed of commercial laying hens. this research was focused on the analysis of biochemical changes linked to hepatic function, and protein and lipid metabolism. It was used 240 laying hens (59 weeks-old) distributed in a completely randomized design of six treatments (five repetitions with eight birds each). The experiments were constituted by a control treatment (CT) with the inclusion of zinc bacitracin and five treatments of oregano essential oil (OeO: 0, 50, 100, 150, and 200 mg.kg-1), respectively. After 28 days of feeding, an increase on serum levels of total proteins and globulins was observed on groups t150 and t200, as well as an increase on albumin levels on group CT. After 84 days of feeding, a significant reduction on total proteins and albumin was observed on group t200, as well as an increase in serum triglycerides. OeO at 200 mg.kg-1 increased globulin levels on day 28, which may be considered an effect in the inflammatory response, which increases serum immunoglobulins and proteins.

Productive Performance, Ovarian Follicular Development, Lipid Peroxidation, Antioxidative Status, and Egg Quality in Laying Hens Fed Diets Supplemented with Salvia officinalis and Origanum majorana Powder Levels

“…According to Botsoglou et al, these compounds possess antimicrobial activity [ 20 ] acting to reduce undesirable intestinal microflora which favors the absorption of nutrients [ 21 ]. The essential oils content in oregano can act as stimulant agents of the immune system during acute or chronic inflammatory processes that can be characterized by an increase in the levels of serum globulins [ 22 ], which can express the metabolic and nutritional status of poultry [ 23 ]. Moreover, essential oils may improve nutrient digestion and absorption by enzymatic stimulation and they also may exert positive effects when used in laying hens.…”

Essential oils as valuable feed additive: A narrative review of the state of knowledge about their beneficial health applications and enhancement of production performances in poultry

“…The researchers wanted to see if any shifts in metabolic profile would indicate a problem with liver function or lipid/protein metabolism. Oregano essential oil doses of 0mg/kg of feed, 50mg/kg of feed, 100mg/kg of feed, 150mg/kg of feed, and 200mg groups given doses of 150 and 200mg/kg showed elevated levels of globulins and proteins (Migliorini et al 2019). Additionally, broiler hens exposed to a high concentration of EO from the herb oregano had elevated levels of cholesterol in their blood serum (Basmacioglu Malayoglu et al 2010).…”

“…However, while several EOs have been found to have beneficial anti-oxidant qualities, their use in meat and meat products is not without its downsides. To begin, some EOs' interactions with food's specific components and structural makeup can reduce the food's nutritional value (Lambert et al 2001;Fernandez-Panchon et al 2008;Migliorini et al 2019;Sharifi-Rad et al 2021). When applied to meat and meat products, the effects of EOs may be greatly attenuated by the presence of lipids, carbohydrates, proteins, and salts in food systems, as opposed to what is observed in vitro.…”

Egg Lipid Profile, Growth Traits, Blood Biomarkers, and Physical Egg Characteristics of Heavy Ecotype Laying Hens Fed Oregano (Origanum vulgare) Meals

“…Oregano meal contains some essential oil. It has antioxidant properties such as carvacrol (5-isopropyl-2-methyl phenol) and thymol (2-isopropyl-5methyl phenol) (Basmacioglu-Malayoglu et al 2010;Migliorini et al 2019). Carvacrol and thymol enter the circulatory system, spread to muscles and other tissues (Bozkurt et al 2012).…”