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1.
怀牛膝多糖对雏鸡疫苗免疫效果的影响 总被引：1，自引：1，他引：1
150羽14日龄蛋公鸡随机均分成3组,用新支二联弱毒苗点眼滴鼻免疫的同时,2个试验组分别肌肉注射高、低剂量的怀牛膝多糖溶液,对照组注射生理盐水,每天注射1次,连续注射3次。分别于免疫后第7、14、21、28、35和42天各组随机抽取8只鸡翼下静脉采血,分离血清,用微量法测定新城疫血凝抑制（HI）抗体效价,于免疫后第10、20、30、40和50天每组随机抽取5只鸡心脏采血,分离淋巴细胞,用MTT法测定淋巴细胞增殖的动态变化,流式细胞仪双染色法检测CD^4＋、CD^8＋T淋巴细胞含量,并放血致死称取体重和胸腺、脾脏、法氏囊的质量,计算器官指数。结果表明,怀牛膝多糖高剂量组的HI抗体效价、CD^4＋/CD^8＋比值和免疫器官指数都明显高于对照组,并且高剂量怀牛膝多糖可以显著促进T淋巴细胞增殖。提示怀牛膝多糖对鸡新支二联疫苗的免疫效果有明显的增强作用。 相似文献
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板蓝根多糖对鸡新城疫抗体滴度和免疫器官的影响 总被引：1，自引：0，他引：1
将150只14日龄蛋公鸡随机均分为3组（板蓝根多糖高、低剂量组，对照组），每组设5个重复，每个重复10羽。14日龄用新城疫Ⅳ系弱毒苗点眼滴鼻免疫：同时板蓝根多糖高剂量组（12．3mg·mL^-1）、低剂量组（6．17mg·mL^-1）分别肌肉注射板蓝根多糖0．3mL／羽，对照组注射等量生理盐水，每天1次，连续3d；免疫后7、14、21、28、35、42d随机取8只翼下静脉采血后分离血清，检测鸡新城疫HI抗体效价：并于免疫后14、21、28、35、42d随机取4只放血致死后称重，摘取脾脏、胸腺、法氏囊称重，计算免疫器官指数。结果表明。大多数试验组鸡的抗体效价与免疫器官指数都显著高于对照组，而且低剂量组高于高剂量组。 相似文献
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目的:探究板蓝根多糖对鸡新城疫抗体滴度和免疫器官的影响。方法:取300只14日龄蛋公鸡,按照板蓝根多糖注射剂量分成高剂量组、低剂量组和对照组,通过对此300只免疫公鸡的血清,检测鸡新城疫(ND)血凝抑制(HI)的抗体效价,并于免疫后10~50d内,平均10d随机取1只公鸡放血致死后称重,摘取法氏囊、胸腺和脾脏进行称重且计算免疫器官指数。结果:新城疫抗体效价:低剂量组>高剂量组>对照组,免疫器官指数:剂量组>高剂量组>对照组。结论:板蓝根多糖对新城疫抗体效价具有显著的影响,而且板蓝根多糖对免疫器官具有促进发育的作用,对两者产生的影响中板蓝根多糖低剂量注射要优于高剂量注射。 相似文献
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将150只14日龄蛋公鸡随机分为3组,板蓝根多糖高、低剂量组,空白对照组,每组设5个重复,每个重复10只,14日龄用新城疫Ⅳ系弱毒苗点眼滴鼻免疫;同时板蓝根多糖高剂量组(12.3mg/ml)、低剂量组(6.17mg/ml)分别肌肉注射板蓝根多糖0.3ml/只,对照组肌肉注射生理盐水0.3ml/只。每天1次,连用3d;免疫后7、14、21、28、35、42d随机取8只鸡,翼下静脉采血后分离血清,检测鸡新城疫HI抗体滴度;并于免疫后14、21、28、35、42d随机取4只鸡,放血致死后称重,摘取脾脏、胸腺、法氏囊称重,计算3种免疫器官指数。结果显示,大多数试验组鸡的抗体滴度与免疫器官指数都显著高于空白对照组,而且低剂量组高于高剂量组。 相似文献
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90只14日龄公鸡随机均分成3组,用新城疫LaSota弱毒疫苗点眼滴鼻免疫的同时,2个试验组分别肌肉注射高、低剂量的灵芝多糖溶液,注射1次/d,连续注射3次,对照组注射生理盐水。各组分别于免疫后7、14、21、28、35、42d翼下静脉采血,分离血清,用微量血凝抑制（HI）测定新城疫抗体效价。结果表明,灵芝多糖高、低剂量组的HI抗体效价明显高于对照组;灵芝多糖的高剂量组抗体效价明显高于低剂量组;表明灵芝多糖对新城疫疫苗的抗体滴度有明显的增强作用,灵芝多糖高剂量组对新城疫疫苗抗体滴度的增强作用更显著。 相似文献
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怀山药多糖对鸡免疫功能的影响 总被引：2，自引：0，他引：2
目的研究怀山药多糖对鸡免疫功能的影响。方法将150羽14日龄蛋公鸡随机分成3组,每组50羽,14日龄用一羽份新支二联弱毒苗点眼滴鼻免疫;同时2个试验组分别肌肉注射怀山药多糖溶液高、低剂量各0.3ml/羽,对照组注射生理盐水0.3ml/羽,连用3d;分别于免疫用药后的第7、14、21、28、35、42天各组随机抽取8只翼下静脉采血,后分离血清,测定新城疫血凝抑制(HI)抗体效价,并于免疫后14、21、28、35、42天随机抽4只放血致死后称重,摘取胸腺、法氏囊、脾脏称重并计算指数。结果试验组特异性免疫抗体和免疫器官指数均高于对照组,在某些时间点差异显著。结论怀山药多糖能增强鸡的免疫功能,可作为免疫增强剂与疫苗同时使用。 相似文献
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将150羽14日龄蛋公鸡随机分成3组,每组50羽,用新支二联弱毒苗点眼、滴鼻免疫的同时2个试验组分别肌肉注射高、低剂量的山药多糖（CYPS）溶液,对照组肌肉注射生理盐水。1次／d,连续3d。分别于免疫后第10,20,30,40,50,60天每组随机抽取8只蛋公鸡,翼下静脉采血,分离血清,用微量法测定新城疫血凝抑制抗体效价;每组再随机抽取5只蛋公鸡心脏采血,分离淋巴细胞,用MTT法测定淋巴细胞增殖的动态变化,用流式细胞仪双染色法检测CD3^＋、CD3^＋CD4^＋和CD3^＋CD8^＋淋巴细胞含量。试验结果表明,山药多糖高剂量组的血凝抑制抗体效价、CD4^＋／CD8^＋比值明显高于对照组,并可显著促进T淋巴细胞增殖,提示山药多糖对鸡新城疫疫苗的免疫效果有明显增强作用。 相似文献
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黄芪多糖对新支二联疫苗免疫雏鸡的免疫调节作用 总被引：3，自引：0，他引：3
为探讨黄芪多糖(APS)对免疫雏鸡的免疫调节作用和机理,本研究将150羽14日龄罗曼公鸡随机均分成3组,用鸡新支二联疫苗(ND-IB)免疫的同时,2个试验组分别肌肉注射高、低剂量的APS溶液,对照组注射生理盐水,每天1次,连续3d。免疫后第10d～60d,每隔10d每组随机取10只鸡,用微量法测定血清中抗新城疫病毒血凝抑制(HI)抗体效价;每组随机取5只鸡,用流式细胞双染色法检测外周血CD3+、CD3+CD4+和CD3+CD8+淋巴细胞百分数,用ELISA方法测定空肠黏液中SIgA的含量,用免疫组织化学法测定盲肠扁桃体和十二指肠绒毛中SIgA阳性细胞数。结果显示,APS组的HI抗体效价、CD3+淋巴细胞数、CD4+/CD8+比值、SIgA的含量和SIgA阳性细胞数都明显高于对照组,且低剂量的APS的效果优于高剂量。本实验表明合适剂量APS对ND-IB疫苗的免疫效果有明显的增强作用。 相似文献
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黄芪多糖对肉鸡新城疫免疫效果的影响 总被引：1，自引：0，他引：1
研究黄芪多糖在新城疫(ND) La Sota疫苗免疫过程中对肉鸡免疫效果的影响.120只1日龄肉雏鸡随机分为3组,每组40只鸡.分为对照组、试验I和Ⅱ组.所有肉鸡于21和42 d分别进行La Sota疫苗的首免和二免,胸肌注射,0.3 mL/羽.试验I组每只鸡分别注射0.3mL黄芪多糖注射液;试验Ⅱ组每只鸡分别注射0.6mL黄芪多糖注射液;对照组正常饲喂全价料.试验结束时称量肉鸡质量,测定脾和法氏囊指数;分别在首免前1d、首免7、14和21 d及二免14和21 d测定ND抗体效价.结果表明:试验Ⅰ和Ⅱ组肉鸡体质量、脾和法氏囊指数均高于对照组,差异显著;试验Ⅰ组从首免21 d开始与对照组差异显著;试验Ⅱ组首免14 d开始与对照组差异显著.从而得出黄芪多糖提高肉鸡体质量和免疫器官指数及新城疫血凝抑制试验抗体效价. 相似文献
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《中国兽医杂志》2016,(9)
为了研究全反式维甲酸(ATRA)对新城疫疫苗的体液免疫增强效果,本试验选取1日龄AA肉鸡作为研究对象,低剂量组和高剂量组分别灌服1μmol/kg体重和5μmol/kg体重ATRA,在7日龄和28日龄时对药物对照组、低剂量组、高剂量组通过滴鼻、点眼的方法免疫新城疫疫苗。在7、14、21、28、35、42日龄和49日龄,每组随机取7只鸡,称重,采集胸腺、脾脏、腔上囊和血清,计算胸腺、脾脏和腔上囊免疫器官指数,利用血凝抑制(HI)试验检测血清中新城疫抗体效价。结果表明,ATRA可以促进雏鸡免疫器官生长,提高雏鸡免疫器官指数和新城疫抗体效价,表明ATRA可以增强雏鸡的体液免疫应答,且5μg/kg体重剂量ATRA对新城疫疫苗的体液免疫增强效果更显著。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献