EFFECT OF DIETARY SAPONIN ON EGG CHOLESTEROL LEVEL AND LAYING HEN PERFORMANCE

1984 ◽  
Vol 64 (4) ◽  
pp. 977-984 ◽  
Author(s):  
J. S. SIM ◽  
W. D. KITTS ◽  
D. B. BRAGG
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Corn Oil ◽  
Dietary Cholesterol ◽  
Specific Effect ◽  
Egg Yolk ◽  
Cholesterol Absorption ◽  
Cholesterol Content ◽  
Yolk Cholesterol ◽  
Single Comb

A feeding trial was carried out for five 28-day periods with diets containing 0.0, 0.04, 0.2 and 0.4% of saponin (Sarsaponin) in either the presence or absence of dietary cholesterol to study the saponin-cholesterol interaction and also to determine the effects on the levels of yolk cholesterol and the performance of single-comb White Leghorn laying hens (44 wk of age). No significant differences were found in the levels of egg yolk cholesterol; however, egg production and feed intake were reduced by feeding saponin. These adverse effects on the layer performance were counteracted or completely disappeared when 0.5% cholesterol was fed simultaneously to the laying birds. Egg yolk cholesterol contents were raised by dietary cholesterol but were not influenced by the dietary presence of saponin. In the second trial, layers were given a dose of 14C-cholesterol emulsified in corn oil with and without 0.48 g saponin in order to determine the specific effect of saponin on dietary cholesterol absorption and deposition into egg yolk. Dietary saponin increased the excretion of 14C-cholesterol from 8.6 to 65.8%, decreased egg deposition from 31.5 to 16.6% and decreased serum radioactivity by 39.2%. Thus, it was concluded that dietary saponin reduced cholesterol retention and transfer of dietary cholesterol to egg yolk, but failed to lower cholesterol content in egg yolk. Key words: Saponin, egg cholesterol, 14C-cholesterol, laying hens

EFFECT OF AN ANTIBIOTIC ON LIPID FRACTIONS IN PLASMA AND EGG YOLK OF LAYING HENS

1963 ◽  
Vol 41 (10) ◽  
pp. 2171-2175
Author(s):  
P. J. Lupien ◽  
F. A. Vandenheuvel ◽  
W. G. Hunsaker ◽  
G. V. Hatina
Keyword(s):  
Egg Production ◽  
Species Differences ◽  
Laying Hens ◽  
Plasma Cholesterol ◽  
Egg Yolk ◽  
Human Beings ◽  
Cholesterol Levels ◽  
Lipid Fractions ◽  
Egg Yolks ◽  
Yolk Cholesterol

Supplementation of the basal ration of laying hens with 0.001, 0.005, and 0.01% neomycin sulphate did not produce any significant changes in the weight of the hens, their eggs, or egg yolks, nor did it alter egg production. Supplemental neomycin caused no significant changes in levels of plasma cholesterol. Plasma and yolk lipid levels varied considerably within as well as between groups of hens. Plasma squalene/plasma cholesterol and yolk squalene/yolk cholesterol ratios were approximately the same, indicating the presence of 250 times more cholesterol than squalene. Plasma squalene/yolk squalene and plasma cholesterol/yolk cholesterol ratios showed that both components were approximately 13 times more concentrated in the yolk than in the plasma. The variable plasma cholesterol levels for rats, rabbits, mice, human beings, as well as the laying hen, treated with neomycin, are suggestive of species differences in response.

scholarly journals Egg Quality Parameters, Production Performance and Immunity of Laying Hens Supplemented with Plant Extracts

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 975
Author(s):  
Muhammad Ammar Dilawar ◽  
Hong Seok Mun ◽  
Dhanushka Rathnayake ◽  
Eun Ju Yang ◽  
Ye Seul Seo ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Proximate Composition ◽  
Laying Hens ◽  
Egg Quality ◽  
Egg Yolk ◽  
Cholesterol Content ◽  
Production Performance ◽  
Dependent Manner ◽  
Yolk Cholesterol ◽  
Dietary Treatments

This study examined the effects of Mentha arvensis (MA) and Geranium thunbergii (GT) extracts in drinking water on the production performance, egg quality, cholesterol content of egg yolk, proximate composition, and sensory qualities of egg and immunity parameters in laying hens. Ninety-six 28-week-old Hy-Line Brown layers were randomly divided into four dietary treatments for 16 weeks. The dietary treatments were (1) control, (2) T1 (0.01% 1 MA:1 GT), (3) T2 (0.05% 1 MA:1 GT), and (4) T3 (0.1% 1 MA:1 GT). Egg production increased significantly with increasing levels of MA and GT. The egg weight was increased in T2, and the feed intake was highest in T2 and T3 (p < 0.05). The Haugh unit and egg shape index were significantly better in T3 and the control than with other treatments (p < 0.05). The content of yolk cholesterol was significantly lower (p < 0.05) in T2 and T3. On the other hand, there were no significant differences in the egg proximate composition. A significant increase in the serum interleukin 6 (IL-6), tumor necrosis factor (TNFα) and immunoglobulins (IgG and IgA) concentration was observed in the birds fed plant extracts when compared to the control. On average, T2 and T3 showed significantly lower (p < 0.05) concentrations of NH3 gas from the feces as compared to the control. This study suggests that MA and GT supplementation could improve the laying performance, egg quality, and immunity, and decrease the egg yolk cholesterol content in a dose-dependent manner.

scholarly journals Performance and hypo-cholesterolemic response of laying hens fed cassava root sievate - based diets.

2021 ◽  
Vol 32 (2) ◽  
pp. 215-223
Author(s):  
O.M.O. Idowu ◽  
A. Oduweso ◽  
E. Daisy
Keyword(s):  
Blood Plasma ◽  
Total Cholesterol ◽  
Egg Production ◽  
Dietary Treatment ◽  
Egg Yolk ◽  
Cholesterol Content ◽  
The Body ◽  
Cholesterol Concentration ◽  
Control Group ◽  
Yolk Cholesterol

A total of one hundred and fifty (150) Nera ser-linked layer strains (32 weeks of age) were used to investigate the performance response, blood plasma and egg yolk cholesterol status of hens fed cassava roul sievate (CRS) bused - diets. CRS was used to replace wheat offal at 0, 5, 10, 15 und 20% respectively, resulting in five dietary treatments. Each treatment had 3 replicates with each replicate group having five hirds. The experiment lasted for 10 weeks. No significant effect of diers was noticed in the body weights, weight gain and daily feed intake. Fced conversion per dozen eggs, hen-day egg production and total egg produced significantly declined as CRS levels increased from 0 to 20% in the diets. Diets with 20% CARS had the poorest performance. However, the blood plasma, egg yolk and egg cholesterol concentrations were reduced significantly (p< 0.05) with increased level of CRS Dietary treatment with 20 % CARS had the lowest (P< 0.05) cholesterol concentration. Inclusion of up to 20% CRS led to 35% reduction in plasma total cholesterol, while 18 and 17% reductions were obtained in the egg yolk total cholesterol and total cholesterol per egy respectively. Replacement of up to 10% (w/w) wheat offal by CRS is therefore recommended 10 effectively reduce cholesterol content of the plasma ,egg yolk and whole egg by 20%, 10% and 17 % respectively at performance level that are comparable with that of the control group. 

scholarly journals Lycopene Supplementation Either Purified or as in Tomato Powder to the Diet of Laying Hens Lowers Egg Yolk Cholesterol by Modulation of Sterol Transporters

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 123-123
Author(s):  
Cemal Orhan ◽  
Osman Kucuk ◽  
Nurhan Sahin ◽  
Mehmet Tuzcu ◽  
Kazim Sahin
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Cholesterol Metabolism ◽  
Regulatory Element ◽  
Basal Diet ◽  
Egg Yolk ◽  
Gene Expressions ◽  
Development Organization ◽  
Yolk Cholesterol ◽  
Tomato Powder

Abstract Objectives The objective of this work was to investigate the effects of dietary supplementation of purified lycopene (LYC) or a source of LYC as in tomato powder (TP) on live hen performance, egg yolk cholesterol concentrations as well as the gene expressions related to mechanism and regulation of cholesterol, namely Niemann-Pick C1-like 1 protein (NPC1L1), acyl-CoA: cholesterol acyltransferase 2 (ACAT2), microsomal triacylglycerol transport protein (MTP), ATP binding cassette transporters sub-family G member 5 and 8 (ABCG5/8), ATP citrate lyase (ACLY), liver X receptor alpha (LXRα) and sterol regulatory element-binding proteins (SREBP1c). Methods A total of 150 20-week-old white laying hens were divided into one of 3 treatments, with 10 replicates of 5 hens per cage, totaling 50 hens per treatment. The birds were fed either a basal diet (Control) or basal diet supplemented with 20 mg purified lycopene/kg diet (LYC) or an equal amount of lycopene-containing tomato powder (TP) for 12 weeks. Results Feed intake, egg production and feed conversion ratio remained similar among treatments (P ≥ 0.27). However, egg weights from hens fed a diet supplemented with lycopene particularly the purified form were greater (P = 0.036). Supplementing lycopene either purified or as in TP increased the concentrations of serum and egg yolk lycopene but decreased serum and egg yolk cholesterol concentrations (P &lt; 0.001). Supplementing LYC purified or as in TP decreased the gene expression of intestinal NPC1L1, MTP, ACAT2, hepatic SREBP1c, ACLY, and LXRα but increased hepatic ABCG5 and ABCG8 (P &lt; 0.001). The gene expressions were more pronounced with TP supplements compared with that of the LYC supplements. Conclusions The results of the present work revealed that egg yolk cholesterol metabolism is downregulated through decreased activities of intestinal NPC1L1, MTP, ACAT2, hepatic SREBP1c, ACLY, and LXRα but upregulated with increased hepatic activities of ABCG5 and ABCG8. Funding Sources Small and Medium Enterprises Development Organization of Turkey (KOSGEB) Turkish Academy of Sciences.

EFFECT OF AN ANTIBIOTIC ON LIPID FRACTIONS IN PLASMA AND EGG YOLK OF LAYING HENS

1963 ◽  
Vol 41 (1) ◽  
pp. 2171-2175
Author(s):  
P. J. Lupien ◽  
F. A. Vandenheuvel ◽  
W. G. Hunsaker ◽  
G. V. Hatina
Keyword(s):  
Egg Production ◽  
Species Differences ◽  
Laying Hens ◽  
Plasma Cholesterol ◽  
Egg Yolk ◽  
Human Beings ◽  
Cholesterol Levels ◽  
Lipid Fractions ◽  
Egg Yolks ◽  
Yolk Cholesterol

Supplementation of the basal ration of laying hens with 0.001, 0.005, and 0.01% neomycin sulphate did not produce any significant changes in the weight of the hens, their eggs, or egg yolks, nor did it alter egg production. Supplemental neomycin caused no significant changes in levels of plasma cholesterol. Plasma and yolk lipid levels varied considerably within as well as between groups of hens. Plasma squalene/plasma cholesterol and yolk squalene/yolk cholesterol ratios were approximately the same, indicating the presence of 250 times more cholesterol than squalene. Plasma squalene/yolk squalene and plasma cholesterol/yolk cholesterol ratios showed that both components were approximately 13 times more concentrated in the yolk than in the plasma. The variable plasma cholesterol levels for rats, rabbits, mice, human beings, as well as the laying hen, treated with neomycin, are suggestive of species differences in response.

scholarly journals Egg quality and coccidiosis infestation in three production systems for laying hens

2021 ◽  
Vol 43 ◽  
pp. e53125
Author(s):  
Reza Vakili ◽  
Ahmad Salahshour ◽  
Ali Zanganeh
Keyword(s):  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Production Systems ◽  
Egg Yolk ◽  
Organic Production ◽  
Cholesterol Concentration ◽  
Egg Mass ◽  
Outdoor Area ◽  
Yolk Cholesterol

A total of 240 white Shaver laying hens from 22 to 34 weeks of age were assigned to 3 treatments and 5 replications. The treatments included: i) Conventional (hens were kept in experimental building without access to outdoor area and fed with the conventional diet), ii) Semi-organic (hens were kept in experimental building with access to outdoor area and fed with the organic diet plus amino acids and vitamin-minerals supplement), and iii) Organic (hens were kept in experimental building with access to outdoor and fed with the organic diet). The results showed statistically significant differences in the feed intake, egg production, egg mass, egg weight, and change body weight(g) means among the treatments (p < 0.05). The hens kept in the organic treatment had fecal highest contain of oocytes coccidia (p < 0.05). The yolk color index and shell strength in the organic treatment significantly increased in comparison with that of other treatments (p < 0.05). The highest HDL was in the semi-organic and organic treatments (p < 0.05). The lowest egg yolk cholesterol concentration was found in hens kept in the semi-organic and organic treatments (p < 0.05). It is concluded that organic production system is useful for improving egg quality.

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