共查询到20条相似文献，搜索用时 93 毫秒
1.
螺旋藻对仔猪生长性能、免疫性能及粪便菌群的影响 总被引：1，自引：0，他引：1
为开拓螺旋藻饲料资源,本试验研究了螺旋藻单独及其与含有枯草芽孢杆菌和乳酸菌的益生菌联用对仔猪生长性能、免疫性能以及粪便菌群的影响。按2×2析因试验设计,将80头平均体重为(8.85±0.20)kg、口蹄疫(FMD)母源抗体为阴性的断奶仔猪随机均分为对照组、螺旋藻组(添加0.5%的螺旋藻)、益生菌组(添加0.5 kg/t的益生菌)以及藻菌组(添加0.5%的螺旋藻与0.5 kg/t的益生菌),每组5个重复,每个重复4头猪,饲粮以粉料形式饲喂。试验期28 d。第8日免疫猪O型及A型FMD疫苗,第7日及第28日采集血清及新鲜粪便。结果显示:1)螺旋藻显著提高了仔猪平均日增重(P0.05),显著降低了料重比(P0.05)。2)第7日和第28日螺旋藻对O型和A型FMD抗体滴度皆无显著影响(P0.05)。3)第28日螺旋藻极显著提高了仔猪血清免疫球蛋白G(Ig G)、免疫球蛋白M(Ig M)及补体3含量(P0.01),对血清补体4含量无显著影响(P0.05)。4)第7日和第28日螺旋藻对仔猪粪便中乳酸菌、大肠杆菌数量无显著影响(P0.05)。除第28日Ig G、Ig M和补体3含量外,螺旋藻与益生菌无互作(P0.05)。结果表明,FMD疫苗免疫期间饲粮中添加0.5%的螺旋藻可以促进仔猪的生长,与益生菌配伍能够提高仔猪的体液免疫性能。 相似文献
2.
《养猪》2017,(6)
为评价解淀粉芽孢杆菌固态发酵黄芪对断奶仔猪生长性能及免疫功能的影响,将90头约5周龄杜长大断奶仔猪随机均分为3组,两个试验组在基础饲粮中分别添加0.3%和0.5%发酵黄芪,对照组饲喂基础饲粮,试验期28 d。试验期间每天统计仔猪腹泻情况,试验结束时统计耗料量,空腹称重,采集血液样品测定血清IgG和IgA含量。结果显示,饲喂0.3%发酵黄芪与0.5%发酵黄芪能极显著提高仔猪增重(P0.01),仔猪末重分别比对照组提高12.97%和11.70%,显著降低料重比(P0.05),提高仔猪血清中IgG和IgA含量,但对仔猪腹泻的防治效果不明显。试验结果表明,发酵黄芪能显著促进仔猪生长,对仔猪的免疫功能也具有积极作用。 相似文献
3.
仔猪饲料添加黄芪的效果试验 总被引：5，自引：0，他引：5
为验证黄芪对提高仔猪生长性能、促进免疫机能的效果,选择100头健康断奶仔猪,分为5组,分别在饲料中添加黄芪1.0%、1.5%、2.0%、2.5%、0.0%,饲喂到64日龄。其间于36日龄免疫口蹄疫疫苗,免疫后第18、27天进行抗体检测。结果表明,仔猪饲料中添加黄芪能明显提高生长性能和免疫功能,其中2%添加量效果最为明显,考虑到经济效益,以1.5%的添加量较为合适。 相似文献
4.
为研究黄芪多糖对雏鸡生产性能及新城疫免疫性能的影响,试验选取240只健康、体质量接近的非免疫鸡随机分为6组:黄芪多糖试验Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ组和基础日粮对照组,每组40只。从6日龄开始,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ和Ⅴ组在基础饲粮中分别添加0.2%、0.4%、0.6%、0.8%和1.0%的黄芪多糖(APS)。7日龄时,用新城疫Lasota疫苗进行滴鼻和点眼免疫。详细记录试验期间各组饲料的消耗情况以及试验鸡的体质量,免疫前1 d和免疫后1、2、3、4和5周采血测定抗体效价和T淋巴细胞百分率,试验结束时测定免疫器官指数。结果表明:饲料中添加APS可提高雏鸡的体质量,降低料重比,提高新城疫抗体水平,促进雏鸡外周血T淋巴细胞的增殖,增加其免疫器官的质量,低剂量(0.2%、0.4%)APS对雏鸡的效果不明显,高剂量(0.6%、0.8%和1.0%)APS对其具有明显的作用。综合生产性能和免疫指标,雏鸡日粮中APS的最佳添加剂量为1%。 相似文献
5.
《养猪》2021,(5)
此项研究旨在初步探索饲粮复方中草药制剂对断奶仔猪生长及免疫性能的影响,将60头21日龄断奶的断奶仔猪随机分为4组,每组3个重复,每个重复5头猪。对照组猪群饲喂基础饲粮,试验A组、试验B组、试验C组猪群饲粮中分别添加不同比例复方中草药,其中试验A组添加0.1%甘草、0.1%板蓝根和0.05%黄芪多糖;试验B组添加0.2%甘草、0.1%板蓝根和0.05%黄芪多糖;试验C组添加0.3%甘草、0.1%板蓝根和0.05%黄芪多糖。预试期为1周,试验期为4周,试验期间记录各组猪群采食量和体重增长情况,同时在试验末期采集猪群血清样品用于检测IgA、IgG和IgM含量。结果发现:与对照组相比,3个试验组断奶仔猪日增重均有所提高,但采食量有所下降,导致各试验组猪群料重比有所下降,其中试验B组下降更明显。此外,进一步血清指标检测数据表明,饲粮中添加复方中草药制剂也有利于提高血清中IgA、IgG和IgM含量,提示其可提高猪群免疫性能。研究结果表明,饲粮中添加复方中草药制剂有利于提高断奶仔猪日增重,并降低料重比,且提高猪群免疫性能,其中添加比例以0.2%甘草、0.1%板蓝根和0.05%黄芪多糖较为适宜。 相似文献
6.
7.
《中国兽医学报》2016,(11)
通过对断奶仔猪生长性能及血液生理生化指标的测定筛选出黄芪多糖(APS)的最适添加量,同时分析最适宜添加量的APS组对盲肠菌群多样性的影响。将40头(杜×长×大)28日龄断奶仔猪根据初始体质量相近原则分为5组,每组8头,Ⅰ组为对照组,饲喂基础日粮,Ⅱ组添加150mg/kg金霉素,Ⅲ~Ⅴ组分别添加200,400,800mg/kg APS,试验期28d。测定断奶仔猪生长性能,血液生理生化指标及盲肠的菌群多样性。在整个试验期,与对照组相比,日粮中添加200mg/kg APS使肉料比显著升高(P0.05);添加200mg/kg APS提高了血清中总蛋白、白蛋白、谷草转氨酶、谷丙转氨酶和碱性磷酸酶的含量,降低了血清尿素氮和葡萄糖的含量(P0.05);日粮中添加抗生素和APS均能显著提高血液中淋巴细胞数和血小板数(P0.05),除添加200mg/kg APS的试验组外,其余各组均可显著提高血液中白细胞和红细胞数量(P0.05),添加200mg/kg APS后盲肠菌群丰富度高且优势条带明显。 相似文献
8.
《饲料研究》2017,(3)
试验用黄芪多糖(APS)、香菇多糖(LNT)、APS与LNT联合应用检测仔猪的猪瘟抗体水平、血液嗜中性白粒细胞的百分数及淋巴细胞的转化率。选用24头20日龄健康约克仔猪,分为对照组、APS组、LNT组和APS+LNT组;各试验组仔猪在25和40日龄时分别肌内注射APS、LNT和APS+LNT 4.0 mL,并分别于25、40和50日龄时采血检测仔猪免疫指标。结果表明:应用一定剂量的APS、LNT及APS与LNT联合应用对3项指标均有不同程度的提升,并以APS与LNT联合应用时3项指标测试中指数明显提升,极显著提高猪瘟疫苗的抗体水平(P0.01),显著提高嗜中性白粒细胞百分数和淋巴细胞转化率(P0.05),说明在临床上APS与LNT联合应用可提高猪瘟抗体水平,产生协同作用。 相似文献
9.
《中国畜牧兽医》2018,(11)
本试验旨在研究博落回提取物对断奶仔猪生长性能、血清免疫指标及抗氧化指标的影响,选择120头35日龄的健康杜×长×大三元杂交断奶仔猪,按体重相近、性别比例相同原则随机分成2组,每组5个重复,每个重复12头猪,预饲期5d,试验期30d,对照组饲喂基础日粮,试验组饲喂添加0.1%博落回提取物的基础日粮。试验期间,测定每组仔猪的平均日增重(ADG)、平均日采食量(ADFI)及料重比(F/G);在试验结束时,每个重复选取2头仔猪采血测定血清免疫指标及抗氧化指标。结果显示:(1)添加博落回提取物组断奶仔猪ADG较对照组提高3.89%(P0.05),F/G下降4.32%(P0.05),且腹泻率较对照组有显著降低的趋势(P=0.076)。(2)日粮中添加博落回提取物显著提高了断奶仔猪血清中免疫球蛋白G(IgG)和肿瘤坏死因子-α(TNF-α)的含量(P0.05),血清IgA及IgM含量分别较对照组提高了4.59%和4.60%(P0.05)。(3)日粮中添加博落回提取物可显著降低断奶仔猪血清中丙二醛(MDA)含量(P0.05),同时显著提高总超氧化物歧化酶(T-SOD)活性(P0.05)。综上所述,在日粮中添加0.1%博落回提取物可降低断奶仔猪腹泻率,并提高机体免疫力及抗氧化能力,且对断奶仔猪生长性能无不良影响。 相似文献
10.
为了解黄芪多糖和法国索比亚(SORBIAL)生物科技公司生产的香肠乳酸杆菌及鼠李糖乳酸杆菌组成的益生菌制剂(简称:索比亚益生菌)防制口蹄疫(Foot and Mouth Disease,FMD)的临床协同作用,选用感染口蹄疫的某300头母猪规模猪场60头断奶仔猪为试验动物模型。在分别注射FMD合成肽疫苗进行紧急防制5d后,每组20头猪随机分为对照组、试验甲组和乙组;对照组使用普瑞纳乳猪饲料作为饲养基础日粮,试验甲组在基础日粮中添加索比亚益生菌2kg/t拌料,试验乙组在基础日粮中添加索比亚益生菌1.8kg/t及APS0.2kg/t拌料,试验时间32d。结果表明,对照组诊断为FMD的4只全部心源性猝死,试验甲组出现诊断为FMD的猝死1例,而试验乙组无FMD案例发生;试验甲组和乙组比对照组防制FMD效果分别提高75%和100%,试验甲组和乙组比对照组的FMD疫苗保护率分别提高15%和20%,这说明,索比亚益生菌具有显著的防制FMD和提高FMD疫苗保护的作用,添加APS对其具有明显的协同作用;同时,试验甲组和乙组比对照组的饲料利用率分别提高11.0%和12.1%,而日增质量分别提高2.86%和8.57%;可见,索比亚益生菌对断奶仔猪的生长有良好的促进作用,添加APS对其有明显的协同作用。 相似文献
11.
选择中国大陆最早分离的H9N2亚型禽流感病毒(avian influenza virus,AIV)A/Chicken/Guangdong/SS/94(H9N2)(缩写为SS株)和1998年大流行时期分离的H9N2亚型AIVA/Chicken/Shanghai/F/98(H9N2)(缩写为F株)为研究对象,对其在SPF鸡体内的复制能力和传播途径特性比较后发现,F株在4周龄SPF鸡气管中的复制能力高于SS株,F株可以经气溶胶传播途径传播,SS株不能经气溶胶传播途径传播;利用反转录-聚合酶链反应(RT-PCR)方法获取F株和SS株的HA和NA基因的cDNA,序列分析得知,F株和SS株的HA和NA基因的同源性分别是96.6%和98.1%;HA基因的裂解位点氨基酸序列都是PARSSR↓GL,但有5个氨基酸的差异,即166位N(F)→D(SS)、198位A(F)→V(SS)、217位V(F)→I(SS)、335位G(F)→R(SS)、504位L(F)→S(SS);2株病毒的NA基因在63~65位都存在氨基酸缺失,但在NA基因红细胞吸附位点的氨基酸序列不同,分别是IKKDSRSG(F)和IKEDLRSG(SS)。F株和SS株的传播特性差异是否与其表面基因序列有关,有待进一步研究。 相似文献
12.
禽类的起源、演化及我国主要家禽品种类型与分布 总被引：1，自引：1，他引：0
家禽是重要经济价值动物.本文从禽类种群进化学说出发,简介了禽类的起源、演化、动物学分类和家禽的驯化(养)与品种的形成,并对我国主要家禽(鸡、鸭、鹅)地方品种和培育品种(配套系)的分布与类型作了描述,以期为研究我国家禽起源系统,保护与利用我国家禽品种,促进家禽生产可持续发展提供参考. 相似文献
13.
近年以来,由于市场因素的刺激,生猪的存养量大幅上升,再加上由于流通环节较多,流通非常频繁,流通距离越来越远。这对繁荣经济,增加养殖效益起了重要的推动作用,但也同时给疾病的感染和传播创造了有利条件,给猪病的防治带来了困难。有的猪场感染了传染病后,由于治疗不及时不得法,而造成了惨重的经济损失。2008年7月中旬,我街道一养猪户因盲目从外地购进中猪,发生猪病疫情,引起猪只连续死亡,造成一定的经济损失。根据流行病学、临床症状、剖检变化和实验室诊断,诊断该病为猪链球菌病和猪伪狂犬病混合感染,现报告如下。 相似文献
14.
１前言１．１鸡白冠病鸡白冠病是由卡氏住白细胞原虫寄生于鸡的红细胞和单核细胞而引起的鸡的贫血性疾病。吸血昆虫蚋和库蠓叮咬鸡引起传播，是主要的传播媒介，一般在夏末和秋季多发，由于夏季降雨量较大，部分沟渠积水，库蠓和蚋多孳生，因此在多雨水涝的年份发病率明显增高。１９９８年中国从南到北发生洪涝灾害，吸血昆虫的孳生格外严重，出现了一个白冠病多发年，而后两年发病稍轻，并有地区性，今年８月中旬以来白冠病的发病呈抬头趋势，有一定的死亡率，对蛋鸡产蛋率也会引起一定程度的降低，应引起养鸡户的重视。１．２鸡痘鸡痘也是… 相似文献
15.
17.
18.
Pinard CL Weiss ML Brightman AH Fenwick BW Davidson HJ 《American journal of veterinary research》2003,64(1):104-108
OBJECTIVE: To evaluate lactoferrin and lysozyme content in various ocular glands of bison and cattle and in tears of bison. SAMPLE POPULATION: Tissues of ocular glands obtained from 15 bison and 15 cattle and tears collected from 38 bison. PROCEDURE: Immunohistochemical analysis was used to detect lysozyme and lactoferrin in formalin-fixed, paraffin-embedded sections of the ocular glands. Protein gel electrophoresis was used to analyze ocular glands and pooled bison tears by use of a tris-glycine gel and SDS-PAGE. Western blotting was used to detect lactoferrin and lysozyme. RESULTS: Immunohistochemical staining for lactoferrin was evident in the lacrimal gland and gland of the third eyelid in cattle and bison and the deep gland of the third eyelid (Harder's gland) in cattle. Equivocal staining for lactoferrin was seen for the Harder's gland in bison. An 80-kd band (lactoferrin) was detected via electrophoresis and western blots in the lacrimal gland and gland of the third eyelid in cattle and bison, Harder's glands of cattle, and bison tears. An inconsistent band was seen in Harder's glands of bison. Lysozyme was not detected in the lacrimal gland of cattle or bison with the use of immunohistochemical analysis or western blots. Western blots of bison tears did not reveal lysozyme. CONCLUSIONS AND CLINICAL RELEVANCE: Distribution of lactoferrin and a lack of lysozyme are similar in the lacrimal gland of cattle and bison. Differences in other tear components may be responsible for variability in the susceptibility to infectious corneal diseases that exists between bison and cattle. 相似文献
19.
Harvey CE 《Journal of veterinary dentistry》2002,19(4):186-195
Crown width, height and buccal surface areas were measured on heads or skulls of four dogs and four cats, and were compared with similar measurements on models of human dentition. Buccal surface area variability was greater in dogs and cats than in humans, and teeth of cats were smaller. Horizontal (gingival and occlusal halves) and vertical (mesial, middle, and distal thirds) buccal surface area variability was also greater in canine and feline teeth compared with human teeth. This increased variability suggests the need for testing of reliability and repeatability of scoring when using plaque and calculus indices based on horizontal or vertical segmentation. Buccal surface area variability between teeth also prompts questioning the validity of equal weighting of smaller, irregularly-shaped teeth when calculating a mean mouth score. Whether equal or more reliable results would be obtained from scores of whole teeth in comparison with segmentation indices used currently has yet to be determined. 相似文献
20.
Over a period of about 12 years, 30 abnormal Schistosoma mattheei cercariae were found among a total of approximately 2.8 million examined. Initially seven were recovered from about 1.02 million (0.0007%), which were examined individually while being counted with the aid of a stereoscopic microscope. Subsequently, on the strength of relatively high percentages of abnormal individuals recovered when counting cercariae that failed to penetrate into oxen, it appeared that the morphologically abnormal cercariae were unable to swim and would mostly sediment out of a suspension while most of the normal cercariae would remain swimming. This surmise is supported by recovery of 23 morphologically abnormal cercariae (0.001%) from about 1.8 million, by examining the sediment after the cercarial suspension had been left standing undisturbed in glass measuring cylinders. The abnormalities ranged from aberrant tails only (e.g. an underdeveloped tail, or different degrees of schism) or aberrant heads only, to abnormalities of both the heads and tails. A suggested schematic classification of abnormal cercariae is presented. A young, adult hamster was exposed to eight S. mattheei cercariae with complete schism of the shaft of the tail, by pipetting the cercariae onto the shaved abdominal skin of the anaesthetised animal. Two underdeveloped females were subsequently encountered in squash preparations of the liver when the hamster was killed for worm recovery 10 weeks after infection, thus showing that some of the abnormal cercariae were viable. A method is also described for killing and fixing cercariae while retaining some of the shining brilliance of live cercariae, without them becoming shrivelled, granular and semi-opaque, as occurs when cercariae die spontaneously or are killed with heat. This is apparently the first report of abnormal cercariae of S. mattheei. In addition, a method of concentrating abnormal cercariae after emergence from a snail, a schematic classification of abnormal cercariae and a method for killing and fixing cercariae while retaining much of the shiny brilliance of live cercariae are also reported for the first time as far as is known. 相似文献