地衣芽孢杆菌缓解蛋鸡热应激的效果及机理与研究
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DGGE band patterns of PCR products for intestinal microbial V3 region showed similarities within groups were low.Heat stress reduces the number of DGGE bands and Shannon index for ileum and
growth of Escherichia coB,Salmonella pullorum,and Staph)7lococcus aureus on agar plate and their adhesion to mucin in vitro.
Exp.2 Effects of the Bacillus licheniformis on egg production,egg quality,and serum hormone
试验二地衣芽孢杆菌对热应激蛋鸡生产性能、蛋品质和血液指标的影响
热应激降低蛋鸡日产蛋率(2~9 d)、平均产蛋率和采食量;降低鸡蛋蛋壳强度、蛋壳厚度、 蛋白高度和哈氏单位;提高蛋鸡血清IL.1、TNF-a、内毒素、ACTH和CORT水平;降低了FSH、 LH和P水平(P<0.05)。日粮添加1000 mg/kg地农芽孢杆菌能提高热应激蛋鸡的日产蛋率(2、 5、6和9 d)、平均产蛋率、采食最及鸡蛋蛋壳强度;降低血清lL.1、TNF.Gt、内毒素、ACTH和 CORT水平,提高FSH和P水平(P<0.05)。
licheniformiS were evaluated in vitro.And then.production experiment was carried out tO assay the effect of different doses of Bacillus licheniformis on the egg production,egg quality,and serum indices
The aim of this study was to investigate the growth characteristics,tolerance to acid and bile salt,
and adhesive capability of the Bacillus licheniformis.The results showed that growth of the Bacillus licheniformij came into logarithmic phase from 1 2 h and it lasted to about 22 h.pH of the fermentation
to explore the underlying mechanisms for the alleviating effects on the heat stress suffered by hens.
Exp.1 Biological and probiotic properties of the Bacillus licheniformis
试验四地衣芽孢杆菌对热应激蛋鸡肠道微生物区系的影响
肠道微生物V3区PCR产物的DGGE图谱显示各组条带组内相似度较低。热应激降低了回、 盲肠的DGGE条带数、香浓指数、盲肠乳杆菌和双歧杆菌浓度,增加回、盲肠大肠杆菌浓度(P< 0.05)。日粮添加1000 mg/kg地农芽孢杆菌增加热应激蛋鸡卣肠DGGE的条带数、香浓指数和乳 杆菌浓度(P<0.05)。5个共有和特异性条带分属于Lactobacillus reuteri、Enterococcus sp.、
levels of heat-stressed laying hens
Heat stress depressed daily egg production(2~9 d),average egg production and feed intake of hens,lowered egg shell strength,shell thickness,albumen height,and Haugh unit,lowered serum FSH, LH,and P levels,boosted ACTH and CORT levels,elevated serum IL-i,TNF-ct,and endotoxin levels of laying hens.1 000 mg/kg dietary Bacillus lichenifo丌,l西enhanced daily egg production(2,5,6,and 9 d),average egg production and feed intake of heat-treated hens,increased the egg shell strength, decreased serum IL一1,TNF-ct,and endotoxin levels,bring down serum ACTH and CORT levels,and raise FSH and P levels ofheat.stressed hens(P<0.05).
试验三地衣芽孢杆菌对热应激蛋鸡肠道屏障功能的影响
热应激损伤蛋鸡肠道绒毛结构,降低回、盲肠绒毛高度和V:C值,增加盲肠隐窝深度;降低 回、盲肠上皮内淋巴细胞数量和slgg阳性面积,增加肥大细胞数量;短期热应激使盲肠杯状细 胞数量增加;长期则使之减少;热应激降低蛋鸡回、盲肠occluding、claudin一门}Ⅱ盲肠EGFmRNA 的表达量。(P<O.05)。日粮添加1000 mg/kg地农芽孢杆菌改善了热应激蛋鸡肠道绒毛结构,提 高回、盲肠绒毛高度和盲肠V:C。降低盲肠隐窝深度;提高回、盲肠上皮内淋巴细胞数最和slgA 阳性面积,减少肥大细胞数量,稳定了杯状细胞数量;提高回、盲肠claudin.J和旨肠EGFmRNA 的表达量(P<0.05)。
mg/kg dietary Bacillus licheniformis could enhance the mRNA expressing of claudin-l in ileum and cecum,and EGF in cecum(P<0.05). Exp.4 Effects of the Bacillus licheniformis on intestinal microflora of heat-stressed laying hens
broth declined at earlier stage,but increased later.The dissolved oxygen concentration decreased
gradually.After being subjected to pH 2 for 3 h,loss of activity Was 24%.For pH 3 and 4 for 3 h,the loss Was less than 1 0%.0.3%bile salt decreased survival of the Bacillus lichenifi,rmis tO 89.1%after working for 3 h.Fermentation products of the Bacillus licheniformis could significantly inhibit the
Escherichia coli、Clostridium perfringens和Lactobacillusjohnsonii。 关键词:地农芽孢杆菌,蛋鸡,热应激,肠道,微生物区系
Abstract
This thesis included four parts.Firstly,biological and probiotic properties of the selected Bacillus
摘要
本论文共包括四个部分。首先通过体外试验研究了所选地农芽孢杆菌的生物学特性和Zi{生特 性;然后通过生产试验研究了日粮添加不同剂量的该菌对热应激蛋鸡生产性能、蛋品质和血液指 标的影响,确定了最佳添加剂最;最后通过研究该茵对热应激蛋鸡肠道屏障功能和肠道微生物区 系的影响探讨了该菌缓解蛋鸡热应激作用的可能机制。
in ileum and cecum,and EGF in cecum(P<0.05).1 000 mg/kg dietary Bacillus licheniformis could
improve structure of intestinal villi,enhance villus height of ileum and cecum and V:C of cecum, decreased crypt depth of cecum,increased the number of lELs and area positive for slgA,and decreased mast cell number in ileum and cecum(P<0.05).Also,it stabilized the distribution of goblet cells.1 000
Exp.3 Effects of the Bacillus licheniformis on intestinal barrier function of heat-stressed laying
hens
Heat damaged structure of intestinal villi in hens,decreased villus height and V:C of ileum and cecum,enhanced crypt depth of cecum,decreased the number of IELs and area positive for slgA,and
of heat-stressed laying hens.So,the optimal dosage Was determined.At last,the influence of the
Bacillus licheniforJ竹括on intestinal barrier function and microflora of heat·stressed hens was evaluated
试验一地衣芽孢杆菌的生物学特性研究
本试验研究了所选地农芽孢杆菌的生长、耐酸和耐胆盐、抗菌及体外黏附特性。结果表明: 该菌从第12 h进入对数生长期,持续至22 h。发酵液pH值先卜降,后升高,溶氧浓度逐渐降低。 pH 2作用3 h活性损失24%,pH 3和4则小于10%。0.3%胆盐作用3 h后存活率为89.1%。该菌 的发酵产物对大肠杆菌、鸡白痢沙门氏菌和金黄色葡萄球菌的平板生长有明显抑制作用。该菌能 黏附到肠道枯蛋白并抑制上述■种病原菌的黏附。
cecum,reduced the cecal concentrations of Lactobacillus and Bifidobacterium,and increased E.coli concentrations of ileum and cecum(P<0.05).Diet supplemented with 1 000 mg/l(g Bacillus licheniformis increased the number of DGGE bands and Shannon index for cecum,and increased the concentration of Lactobacillus in cecum of layers under heat stress(P<0.05).Five common or specific bands could be affiliated to Lactobacillus reuteri,Enterococcus sp.,Escherichia coil,Clostridium perfringens,and Lactobacillusjohnsonii,respectively. Key words:Bacillus licheniformis,Laying hen,Heat stress,Intestine,Microflora
increased mast cell number in ileum and cecum.Shorts stress increased the number ofgoblet cells in the
பைடு நூலகம்
cecum,while long stress decreased it.Heat depressed the mRNA expressing of occluding and claudin—J
growth of Escherichia coB,Salmonella pullorum,and Staph)7lococcus aureus on agar plate and their adhesion to mucin in vitro.
Exp.2 Effects of the Bacillus licheniformis on egg production,egg quality,and serum hormone
试验二地衣芽孢杆菌对热应激蛋鸡生产性能、蛋品质和血液指标的影响
热应激降低蛋鸡日产蛋率(2~9 d)、平均产蛋率和采食量;降低鸡蛋蛋壳强度、蛋壳厚度、 蛋白高度和哈氏单位;提高蛋鸡血清IL.1、TNF-a、内毒素、ACTH和CORT水平;降低了FSH、 LH和P水平(P<0.05)。日粮添加1000 mg/kg地农芽孢杆菌能提高热应激蛋鸡的日产蛋率(2、 5、6和9 d)、平均产蛋率、采食最及鸡蛋蛋壳强度;降低血清lL.1、TNF.Gt、内毒素、ACTH和 CORT水平,提高FSH和P水平(P<0.05)。
licheniformiS were evaluated in vitro.And then.production experiment was carried out tO assay the effect of different doses of Bacillus licheniformis on the egg production,egg quality,and serum indices
The aim of this study was to investigate the growth characteristics,tolerance to acid and bile salt,
and adhesive capability of the Bacillus licheniformis.The results showed that growth of the Bacillus licheniformij came into logarithmic phase from 1 2 h and it lasted to about 22 h.pH of the fermentation
to explore the underlying mechanisms for the alleviating effects on the heat stress suffered by hens.
Exp.1 Biological and probiotic properties of the Bacillus licheniformis
试验四地衣芽孢杆菌对热应激蛋鸡肠道微生物区系的影响
肠道微生物V3区PCR产物的DGGE图谱显示各组条带组内相似度较低。热应激降低了回、 盲肠的DGGE条带数、香浓指数、盲肠乳杆菌和双歧杆菌浓度,增加回、盲肠大肠杆菌浓度(P< 0.05)。日粮添加1000 mg/kg地农芽孢杆菌增加热应激蛋鸡卣肠DGGE的条带数、香浓指数和乳 杆菌浓度(P<0.05)。5个共有和特异性条带分属于Lactobacillus reuteri、Enterococcus sp.、
levels of heat-stressed laying hens
Heat stress depressed daily egg production(2~9 d),average egg production and feed intake of hens,lowered egg shell strength,shell thickness,albumen height,and Haugh unit,lowered serum FSH, LH,and P levels,boosted ACTH and CORT levels,elevated serum IL-i,TNF-ct,and endotoxin levels of laying hens.1 000 mg/kg dietary Bacillus lichenifo丌,l西enhanced daily egg production(2,5,6,and 9 d),average egg production and feed intake of heat-treated hens,increased the egg shell strength, decreased serum IL一1,TNF-ct,and endotoxin levels,bring down serum ACTH and CORT levels,and raise FSH and P levels ofheat.stressed hens(P<0.05).
试验三地衣芽孢杆菌对热应激蛋鸡肠道屏障功能的影响
热应激损伤蛋鸡肠道绒毛结构,降低回、盲肠绒毛高度和V:C值,增加盲肠隐窝深度;降低 回、盲肠上皮内淋巴细胞数量和slgg阳性面积,增加肥大细胞数量;短期热应激使盲肠杯状细 胞数量增加;长期则使之减少;热应激降低蛋鸡回、盲肠occluding、claudin一门}Ⅱ盲肠EGFmRNA 的表达量。(P<O.05)。日粮添加1000 mg/kg地农芽孢杆菌改善了热应激蛋鸡肠道绒毛结构,提 高回、盲肠绒毛高度和盲肠V:C。降低盲肠隐窝深度;提高回、盲肠上皮内淋巴细胞数最和slgA 阳性面积,减少肥大细胞数量,稳定了杯状细胞数量;提高回、盲肠claudin.J和旨肠EGFmRNA 的表达量(P<0.05)。
mg/kg dietary Bacillus licheniformis could enhance the mRNA expressing of claudin-l in ileum and cecum,and EGF in cecum(P<0.05). Exp.4 Effects of the Bacillus licheniformis on intestinal microflora of heat-stressed laying hens
broth declined at earlier stage,but increased later.The dissolved oxygen concentration decreased
gradually.After being subjected to pH 2 for 3 h,loss of activity Was 24%.For pH 3 and 4 for 3 h,the loss Was less than 1 0%.0.3%bile salt decreased survival of the Bacillus lichenifi,rmis tO 89.1%after working for 3 h.Fermentation products of the Bacillus licheniformis could significantly inhibit the
Escherichia coli、Clostridium perfringens和Lactobacillusjohnsonii。 关键词:地农芽孢杆菌,蛋鸡,热应激,肠道,微生物区系
Abstract
This thesis included four parts.Firstly,biological and probiotic properties of the selected Bacillus
摘要
本论文共包括四个部分。首先通过体外试验研究了所选地农芽孢杆菌的生物学特性和Zi{生特 性;然后通过生产试验研究了日粮添加不同剂量的该菌对热应激蛋鸡生产性能、蛋品质和血液指 标的影响,确定了最佳添加剂最;最后通过研究该茵对热应激蛋鸡肠道屏障功能和肠道微生物区 系的影响探讨了该菌缓解蛋鸡热应激作用的可能机制。
in ileum and cecum,and EGF in cecum(P<0.05).1 000 mg/kg dietary Bacillus licheniformis could
improve structure of intestinal villi,enhance villus height of ileum and cecum and V:C of cecum, decreased crypt depth of cecum,increased the number of lELs and area positive for slgA,and decreased mast cell number in ileum and cecum(P<0.05).Also,it stabilized the distribution of goblet cells.1 000
Exp.3 Effects of the Bacillus licheniformis on intestinal barrier function of heat-stressed laying
hens
Heat damaged structure of intestinal villi in hens,decreased villus height and V:C of ileum and cecum,enhanced crypt depth of cecum,decreased the number of IELs and area positive for slgA,and
of heat-stressed laying hens.So,the optimal dosage Was determined.At last,the influence of the
Bacillus licheniforJ竹括on intestinal barrier function and microflora of heat·stressed hens was evaluated
试验一地衣芽孢杆菌的生物学特性研究
本试验研究了所选地农芽孢杆菌的生长、耐酸和耐胆盐、抗菌及体外黏附特性。结果表明: 该菌从第12 h进入对数生长期,持续至22 h。发酵液pH值先卜降,后升高,溶氧浓度逐渐降低。 pH 2作用3 h活性损失24%,pH 3和4则小于10%。0.3%胆盐作用3 h后存活率为89.1%。该菌 的发酵产物对大肠杆菌、鸡白痢沙门氏菌和金黄色葡萄球菌的平板生长有明显抑制作用。该菌能 黏附到肠道枯蛋白并抑制上述■种病原菌的黏附。
cecum,reduced the cecal concentrations of Lactobacillus and Bifidobacterium,and increased E.coli concentrations of ileum and cecum(P<0.05).Diet supplemented with 1 000 mg/l(g Bacillus licheniformis increased the number of DGGE bands and Shannon index for cecum,and increased the concentration of Lactobacillus in cecum of layers under heat stress(P<0.05).Five common or specific bands could be affiliated to Lactobacillus reuteri,Enterococcus sp.,Escherichia coil,Clostridium perfringens,and Lactobacillusjohnsonii,respectively. Key words:Bacillus licheniformis,Laying hen,Heat stress,Intestine,Microflora
increased mast cell number in ileum and cecum.Shorts stress increased the number ofgoblet cells in the
பைடு நூலகம்
cecum,while long stress decreased it.Heat depressed the mRNA expressing of occluding and claudin—J