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左旋咪唑对HVT免疫雏鸡免疫器官中T细胞数量影响的观察 总被引：2，自引：0，他引：2
观察了左旋咪唑对HVT免疫雏鸡免疫器官中T细胞数量的影响，结果表明：雏鸡在1日龄接种火鸡疱疹病毒（HVT）冻干苗后，同时连续4d应用15mg/kg左旋咪唑组和空白对照组相比，免疫后7、14、21、28d，胸腺、法氏囊和脾脏等免疫器官的不同区域中T淋巴细胞的数量均呈现不同程度的增多，并在大部分时间内差异显著（P＜0.05）。 相似文献
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研究观察了左旋咪唑对HVT免疫雏鸡外周血液中ANAE^ T淋巴细胞数量的影响。结果表明，雏鸡在1日龄接种火鸡疱疹病毒（HVT）冻干苗后，连续4d每日应用15mg/kg左旋咪唑的给药组和空白对照组相比，免疫后第7、14、21和28天，外周血液中的ANAE^ T淋巴细胞数量，不论是总数、还是粗颗粒型或细颗粒型阳性细胞均呈现不同程度的增多，并以ANAE^ T淋巴细胞总数和粗颗粒型阳性细胞增多最为明显。其中除ANAE^ T淋巴细胞总数在第28天时和对照组差异不显著外，其余时间两组相比二种类型的T淋巴细胞均差异显著（P＜0．05）。 相似文献
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本试验分别用MD三价苗和HVT苗免疫AA雏鸡,免疫后15天用MD强毒(vMDV)攻击,检测其免疫保护率及免疫器官组织的免疫应答变化。结果表明,MD三价苗、HVT苗免疫雏鸡vMDV攻毒后的免疫保护率分别为73.3%和56.7%,其免疫器官(胸腺、法氏囊、脾脏)以及局部免疫组织(盲肠扁桃体、肺支气管粘膜下淋巴细胞组织、哈德尔腺)中的T_(ANAE~+)、TA_(cp~+)、浆细胞和淋巴细胞数量明显高于未免疫攻毒鸡;其中MD三价苗的免疫应答水平明显高于HVT苗,表明不同MD疫苗的免疫保护力与免疫器官的免疫应答水平密切相关。 相似文献
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选1日龄雏鸡,肌肉注射火鸡疱疹病毒(HVT)冻干疫苗,随机分为4组,每组20只.1组和2组鸡免疫同时分别应用10、100毫克/千克体重·天甲硝唑,3组免疫同时应用10毫克/千克体重·天左旋咪唑,连用3天,4组为空白对照组.采集外周血淋巴细胞和血清,应用淋巴细胞转化试验和酶联免疫吸附试验(ELISA)测定T淋巴细胞转化和抗HVT抗体滴度.结果表明,10和100毫克/千克体重·天甲硝唑用药鸡外周血T淋巴细胞转化和鸡血清抗HVT抗体滴度均比空白对照组明显升高;10毫克/千克体重·天左旋咪唑用药后也具有类似作用. 相似文献
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本试验研究了潞党参煎剂和左旋咪唑对蛋鸡禽流感抗体效价和免疫器官指数的影响.将1 548只海蓝褐蛋雏鸡随机分为3组,A组为潞党参,剂量按0.75 g/kg添加在饮水中;B组为左旋咪唑,C组为对照.在给鸡群接种禽流感H5N1疫苗的前1 d,把潞党参煎剂和左旋咪唑分别连续给鸡群饮水3d.2周后每组随机抽取24只鸡翅下静脉采血,检测各组鸡血凝抑制抗体效价.于免疫后35日龄、42日龄、49日龄,每组随机抽取5只鸡称重,剖杀,摘取胸腺、脾脏和腔上囊并称重,计算3种免疫器官指数.试验重复3次,结果显示,与对照组相比A组的抗体效价和免疫器官指数均差异显著(P＜0.05),表明潞党参可提高雏鸡的体液免疫水平,增强其非特异性免疫功能,并促进免疫器官的发育. 相似文献
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西咪替丁对鸡马立克氏病疫苗免疫的增强作用 总被引：5，自引：1，他引：4
1日龄黄羽鸡雏,皮下注射火鸡疱疹病毒(HVT)冻干疫苗,同时应用10、100m/(kgBW·d)西咪替丁,10mg/(kgBW·d)左旋咪唑,连用3d,空白对照组不用药.测定外周血T淋巴细胞转化和血清抗HVT抗体滴度.结果表明10mg/(kgBW·d)西咪替丁用药后7～28d,100mg/(kgBW·d)西咪替丁用药后14～35d,鸡外周血T淋巴细胞转化比空白对照组明显升高;10mg/(kgBW·d)左旋咪唑用药后14～28d,鸡外周血T淋巴细胞转化也比空白对照组明显升高.10～100mg/(kgBW·d)西咪替丁用药后7～28d,鸡血清抗HVT抗体滴度明显高于空白对照组;10mg/(kgBW·d)左旋咪唑用药后7～14d,鸡血清抗HVT抗体滴度也比空白对照组明显升高. 相似文献
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《畜牧兽医学报》2016,(6)
拟研究左旋咪唑、聚乙烯亚胺和聚肌胞分别配合灭活H5N1禽流感病毒口服免疫雏鸡,空肠、回肠中IgA和IgG抗体分泌细胞数量和分布的变化。应用左旋咪唑、聚乙烯亚胺和聚肌胞分别配合灭活H5N1禽流感病毒经口免疫雏鸡后,通过免疫组织化学方法显示空肠、回肠IgA和IgG分泌细胞。聚乙烯亚胺配合灭活禽流感病毒口服免疫后,空肠、回肠IgA和IgG分泌细胞的数量均显著(P0.05)高于单独口服灭活禽流感病毒免疫后的数量;左旋咪唑和聚肌胞分别配合灭活禽流感病毒口服免疫后,空肠、回肠IgA分泌细胞数量显著(P0.05)增加,IgG分泌细胞数量无明显变化。研究表明,左旋咪唑、聚肌胞和聚乙烯亚胺分别配合灭活禽流感病毒口服免疫雏鸡,均能提高肠道局部体液免疫水平,聚乙烯亚胺的效果最好,价格更便宜。 相似文献
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《畜牧与兽医》2016,(3):117-120
研究左旋咪唑配合灭活H5N1禽流感病毒(IAIV)口服免疫对鸡免疫反应和生长性能的影响。用左旋咪唑配合灭活H5N1禽流感病毒口服免疫雏鸡后,通过检测口腔、肠道和呼吸道中特异性Ig A、血清中特异性Ig G和HI抗体水平对免疫效果进行评价,通过称重、检测空肠绒毛长度来评价生长性能。左旋咪唑配合灭活禽流感病毒口服免疫雏鸡后,口腔棉拭子、肠道和气管涮洗液中特异性Ig A水平极显著(P0.01)或显著(P0.05)高于单独口服IAIV;左旋咪唑配合灭活禽流感病毒口服免疫雏鸡后,体重没有变化。本研究表明,左旋咪唑配合灭活H5N1禽流感病毒口服免疫雏鸡,不仅能刺激局部的黏膜免疫应答,还能诱导全身免疫应答反应,对鸡的生长性能影响不大。 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