ArticlePoultry science2020
Consequences of various housing systems and dietary supplementation of thymol, carvacrol, and euganol on performance, egg quality, blood chemistry, and antioxidant parameters.
Article in Poultry science, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.
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Who cites it
22 citing papers in PubMed, 1 synthesis or guideline pooled it, 63 citations in OpenAlex.
- Pharmaco-toxicological aspects of thymol in veterinary medicine. A systematic review.Frontiers in veterinary science · 2025Pooled it
- Nutritional enrichment of eggs through essential oil-supplemented laying hen diets and associations with intestinal microbiota.Food science of animal resources · 2026Article
- Alginate oligosaccharides derived from tropical brown seaweeds as sustainable alternatives to antibiotic growth promoters in poultry nutrition: Functional mechanisms and production perspectives.Veterinary world · 2026Review
- Dietary supplementation of oregano essential oil, lauric acid, and a multi-enzyme complex enhances productivity, metabolic status, and gut health in Dagu breeder hens.Journal of animal science · 2025Article
- Phytobiotics in poultry: revolutionizing broiler chicken nutrition with plant-derived gut health enhancers.Journal of animal science and biotechnology · 2024Review
- Effect of probiotics and humate substances on blood parameters, intestinal development and immune organs of growing quail.Animal biotechnology · 2023Article
- Effect of clove buds powder supplementation on hematological profile, biochemical parameters, lymphoid organs, and cell-mediated immunity of broilers.Open veterinary journal · 2023Article
- Monitoring antimicrobial residues in table eggs in Aswan governorate markets and their impact on egg quality and public health.Open veterinary journal · 2023Article
- Evaluation of Physical Egg Quality Parameters of Commercial Brown Laying Hens Housed in Five Production Systems.Animals : an open access journal from MDPI · 2023Article
- Phytogenic Effects on Layer Production Performance and Cytoprotective Response in the Duodenum.Animals : an open access journal from MDPI · 2023Article
- Modulation of growth performance, gut morphometry, and cecal microbiota in broilers by clove (Syzygium aromaticum) and tulsi (Ocimum sanctum) supplementation.Poultry science · 2023Article
- The effects of essential oil from Lippia origanoides and herbal betaine on performance, intestinal integrity, bone mineralization and meat quality in broiler chickens subjected to cyclic heat stress.Frontiers in physiology · 2023Article
- Effects of rearing system and antibiotic treatment on immune function, gut microbiota and metabolites of broiler chickens.Journal of animal science and biotechnology · 2022Article
- Comparison and Correlation Analysis of Immune Function and Gut Microbiota of Broiler Chickens Raised in Double-Layer Cages and Litter Floor Pens.Microbiology spectrum · 2022Article
- Thymol and carvacrol supplementation in poultry health and performance.Veterinary medicine and science · 2022Review
- Amelioration of Sarcoptic Mange-Induced Oxidative Stress and Growth Performance in Ivermectin-Treated Growing Rabbits Using Turmeric Extract Supplementation.Animals : an open access journal from MDPI · 2021Article
- Effect of dietary supplementation of a phytogenic blend containing Schisandra chinensis, Pinus densiflora, and Allium tuberosum on productivity, egg quality, and health parameters in laying hens.Animal bioscience · 2021Article
- Tea Polyphenols Enhanced the Antioxidant Capacity and Induced Hsps to Relieve Heat Stress Injury.Oxidative medicine and cellular longevity · 2021Article
- Goji Berries Supplementation in the Diet of Rabbits and Other Livestock Animals: A Mini-Review of the Current Knowledge.Frontiers in veterinary science · 2021Review
- A Novel Hypothalamic Factor, Neurosecretory Protein GM, Causes Fat Deposition in Chicks.Frontiers in physiology · 2021Article
Corrections and comments
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Authors and funding
8 authors at 6 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The present work was carried out to investigate the influences of housing system and dietary essential oils (EOs) supplementation to laying hens on the productive performance, egg quality, immunity, antioxidant parameters, and hematology. A factorial arrangement (2 × 4) was performed, including 2 housing systems and 4 different types of EOs (without EOs, thymol, carvacrol, and euganol) during the production stages (from 28-78 wk of age). Birds were randomly divided into 2 groups with each of 2,000 birds. The first group was moved to laying cages while the second group was a floor reared. Each group was randomly divided into 4 groups (5 replicates of 100 birds each): The first were considered as a control group, and the second, third, and fourth groups were treated with thymol, carvacrol, and euganol EO, respectively. The results showed that hens reared in cage system had higher egg weight (P < 0.05), egg production, egg mass, and feed intake and better feed conversion ratio (P < 0.001) than those reared in the floor system. Blood picture values (except white blood cells), phagocytic index, phagocytic activity, and blood chemistry parameters (except calcium, phosphorus, and urea values) of laying hens were not affected (P > 0.05) by housing system. The groups fed EOs showed a rapid improvement (P < 0.001) in the egg production%, egg weight, egg mass, and egg quality. Thymol group had the highest egg production (P < 0.001). Thymol and eugenol groups had the highest egg weight, egg mass, and egg quality (P < 0.001). The groups fed diets containing thymol or eugenol consumed lower feed and had better feed conversion ratio (P < 0.001) than the control group. Immunity indices (phagocytic activity [P < 0.05], avian influenza [AIH5 and AIH9], P < 0.001) were improved with the presence of EOs in the laying hen diet. These results strongly suggest that dietary EO supplementation could be a successful attempt to improve the productive performance, egg quality, and immunity of laying hens.
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