scholarly journals Effect of dietary supplementation of Bacillus subtilis DSM29784 on hen performance, egg quality indices, and apparent retention of dietary components in laying hens from 19 to 48 weeks of age

2019 ◽  
Vol 98 (11) ◽  
pp. 5622-5635 ◽  
Author(s):  
M Neijat ◽  
R B Shirley ◽  
J Barton ◽  
P Thiery ◽  
A Welsher ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Quality Indices ◽  
Dietary Components

scholarly journals Mitigation Effects of Bentonite and Yeast Cell Wall Binders on AFB1, DON, and OTA Induced Changes in Laying Hen Performance, Egg Quality, and Health

Toxins ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 156
Author(s):  
Ling Zhao ◽  
Yue Feng ◽  
Jing-Tao Wei ◽  
Meng-Xiang Zhu ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Liver Weight ◽  
Laying Hen ◽  
Egg Laying ◽  
Villus Height ◽  
Crypt Depth ◽  
Induced Changes

The objective of this study was to evaluate the efficacy of mycotoxin binders in reducing the adverse effects of co-occurring dietary aflatoxin B1 (AFB1), deoxynivalenol (DON) and ochratoxin A (OTA) on laying hens. Three hundred and sixty 26-week-old Roman laying hens were randomly allocated into four experimental groups with 10 replicates of nine birds each. The four groups received either a basal diet (BD; Control), a BD supplemented with 0.15 mg/kg AFB1 + 1.5 mg/kg DON + 0.12 mg/kg OTA (Toxins), a BD + Toxins with Toxo-HP binder (Toxins + HP), or a BD + Toxins with TOXO XL binder (Toxins + XL) for 12 weeks. Compared to the control, dietary supplementation of mycotoxins decreased (P < 0.10) total feed intake, total egg weight, and egg-laying rate, but increased feed/egg ratio by 2.5–6.1% and mortality during various experimental periods. These alterations induced by mycotoxins were alleviated by supplementation with both TOXO HP and XL binders (P < 0.10). Furthermore, dietary mycotoxins reduced (P < 0.05) eggshell strength by 12.3% and caused an accumulation of 249 μg/kg of DON in eggs at week 12, while dietary supplementation with TOXO HP or XL mitigated DON-induced changes on eggshell strength and prevented accumulation of DON in eggs (P < 0.05). Moreover, dietary mycotoxins increased relative liver weight, but decreased spleen and proventriculus relative weights by 11.6–22.4% (P < 0.05). Mycotoxin exposure also increased alanine aminotransferase activity and reduced immunoglobulin (Ig) A, IgM, and IgG concentrations in serum by 9.2–26.1% (P < 0.05). Additionally, mycotoxin exposure induced histopathological damage and reduced villus height, villus height/crypt depth, and crypt depth in duodenum, jejunum and (or) ileum (P < 0.05). Notably, most of these histological changes were mitigated by supplementation with both TOXO HP and XL (P < 0.05). In conclusion, the present study demonstrated that the mycotoxin binders TOXO HP and XL can help to mitigate the combined effects of AFB1, DON, and OTA on laying hen performance, egg quality, and health.

scholarly journals Effects of Three Strains of Bacillus subtilis Supplemented to Diets on Egg Quality, Intestinal Microflora and Tibia in The Late Stage of Laying Hens

2010 ◽  
Vol 52 (5) ◽  
pp. 389-398 ◽  
Author(s):  
Wan-Seob Lee ◽  
Bo-Keun Lee ◽  
Jea-Young Kim ◽  
Ji-Sook Kim ◽  
So-Yeon Lee ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Late Stage ◽  
Intestinal Microflora ◽  
Laying Hens ◽  
Egg Quality

Effects of dietary Bacillus subtilis RX7 and B2A supplementation on productive performance, egg quality, blood profiles, and excreta Salmonella counts in laying hens

2020 ◽  
Vol 100 (3) ◽  
pp. 411-417
Author(s):  
Huan Shi ◽  
Wan Lin Zhang ◽  
In Ho Kim
Keyword(s):  
Bacillus Subtilis ◽  
Egg Production ◽  
Laying Hens ◽  
Egg Quality ◽  
Basal Diet ◽  
Productive Performance ◽  
Blood Profile ◽  
Colony Forming Units ◽  
Dietary Treatments ◽  
Blood Profiles

An experiment was carried out to investigate the effect of Bacillus subtilis RX7 and B2A supplementation on egg production, egg quality, blood profile, and excreta Salmonella population in laying hens. A total of 192 Hy-Line Brown laying hens (40-wk-old) were randomly assigned into four dietary treatments, each of which was replicated eight times with six hens per replicate in a 5 wk trial. The dietary treatments were NC, which is a basal diet without antibiotics or Bacillus subtilis; PC, which is an NC + 0.5 g kg−1 antibiotic (virginiamycin) diet; BSR, which is an NC + 0.5 g kg−1 Bacillus subtilis RX7 (1.0 × 109 colony forming units g−1); and BSB, which is an NC + 0.5 g kg−1 Bacillus subtilis B2A (1.0 × 109 colony forming units g−1). The results showed that hens receiving BSB diets had increased (P < 0.05) eggshell thickness over hens fed the NC, PC, and BSR diets (week 3). The excreta Salmonella counts in the PC, BSR, and BSB groups were lower than the NC group (P < 0.05). These results indicate that dietary inclusion of Bacillus subtilis RX7 and B2A strains effectively decreased excreta Salmonella counts without any detrimental effects on the performance of laying hens.

scholarly journals Dietary cadmium chloride impairs shell biomineralization by disrupting the metabolism of the eggshell gland in laying hens

2020 ◽  
Vol 98 (2) ◽  
Author(s):  
Mingkun Zhu ◽  
Huaiyu Li ◽  
Liping Miao ◽  
Lanlan Li ◽  
Xinyang Dong ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Complement C3 ◽  
Mrna Levels ◽  
Palisade Layer ◽  
Positive Effects ◽  
Laying Performance ◽  
Dietary Cadmium

Abstract In this study, we identified cadmium (Cd) as a potential endocrine disruptor that impairs laying performance, egg quality, and eggshell deposition and induces oxidative stress and inflammation in the eggshell glands of laying hens. A total of 480 38-wk-old laying hens were randomly assigned into 5 groups that were fed a basal diet (control) or a basal diet supplemented with Cd (provided as CdCl2·2.5 H2O) at 7.5, 15, 30, and 60 mg Cd per kg feed for 9 wk. The results showed that, when compared with the control group, a low dose of dietary Cd (7.5 mg/kg) had positive effects on egg quality by improving albumen height, Haugh unit, yolk color, and shell thickness at the third or ninth week. However, with the increase in the dose and duration of Cd exposure, the laying performance, egg quality, and activities of eggshell gland antioxidant enzymes (catalase [CAT], glutathione peroxide [GSH-Px]), and ATPase (Na+/K+-ATPase, Ca2+-ATPase, and Mg2+-ATPase) deteriorated, and the activity of total nitric oxide synthase (T-NOS) and the level of malondialdehyde (MDA) increased significantly (P &lt; 0.05). The histopathology and real-time quantitative PCR results showed that Cd induced endometrial epithelial cell proliferation accompanied by upregulation of the mRNA levels of progesterone receptor (PgR) and epidermal growth factor receptor (EGFR), downregulation of the mRNA levels of estrogen receptor α (ERα) and interleukin 6 (IL6), and inflammation of the eggshell gland accompanied by significantly increased expression of complement C3 and pro-inflammatory cytokine tumor necrosis factor α (TNFα) (P &lt; 0.05). In addition, the ultrastructure of the eggshell showed that dietary supplementation with 7.5 mg/kg Cd increased the palisade layer and total thickness of the shell, but with the increase in dietary Cd supplementation (30 and 60 mg/kg) the thickness of the palisade layer and mammillary layer decreased significantly (P &lt; 0.05), and the outer surface of the eggshell became rougher. Correspondingly, the expression of calbindin 1 (CALB1), ovocalyxin-32 (OCX-32), ovocalyxin-36 (OCX-36), osteopontin (SPP1), and ovocledidin-17 (OC-17) decreased significantly (P &lt; 0.05) with increasing dietary Cd supplementation. Conclusively, the present study demonstrates that dietary supplementation with Cd negatively affects laying performance, egg quality, and eggshell deposition by disturbing the metabolism of eggshell glands in laying hens but has a positive effect on egg quality at low doses.

Effects of dietary supplementation of vitamin C on productive performance, egg quality, tibia characteristics and antioxidant status of laying hens

2021 ◽  
Vol 248 ◽  
pp. 104502
Author(s):  
Jomari Badillo Delos Reyes ◽  
Jong Hyuk Kim ◽  
Gi Ppeum Han ◽  
Seung Yeon Won ◽  
Dong Yong Kil
Keyword(s):  
Vitamin C ◽  
Antioxidant Status ◽  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Productive Performance
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