共查询到17条相似文献,搜索用时 500 毫秒
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紫锥菊(紫松果菊、紫锥花)属菊科紫锥菊属,该属有8种,原产美洲,20世纪初期传入欧洲,药用价值很高.已开发为药品者主要为狭叶紫锥菊和紫锥菊,因其头状花序形似松果而得名[1].在美洲民间被广泛应用于多种细菌性和病毒性感染. 相似文献
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紫锥菊黄芪对传染性囊病疫苗免疫雏鸡淋巴细胞亚群和肿瘤坏死因子含量的影响 总被引:1,自引:0,他引:1
为探讨紫锥菊、黄芪提取物提高雏鸡免疫力的效果,本试验选用紫锥菊、黄芪、紫黄(紫锥菊黄芪)合剂3种组方分别以不同的3种剂量给6日龄雏鸡连续口服7 d,13日龄进行腔上囊疫苗免疫,在20,27,34日龄时ELISA方法检测血清中TNF-α的含量;在13,20,27日龄时流式细胞仪检测外周血中CD4+、CD8+含量并计算CD4+/CD8+比值.结果表明,紫锥菊对外周血CD4+/CD8+ T淋巴细胞亚群的比例以及血清TNF-α的含量均有一定的提高,说明紫锥菊提取物针对IBD疫苗具有明显的免疫促进作用,是一种效果极为明显的免疫增强剂. 相似文献
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为了探讨紫锥菊作为免疫增强剂的免疫效果和机理,本试验用1日龄的罗斯308肉鸡作为试验材料并用传染性法氏囊疫苗进行免疫。紫锥菊提取物分3种剂量组(A组0.1 mL/只、B组0.5 mL/只、C组1 mL/只)在6日龄开始连续给雏鸡口服7 d,在13,20,27,34,41日龄采血检测外周血中法氏囊病毒抗体,同时测定外周血中IL-2和TNF-α的含量,计算肉鸡的生产性能。结果表明,紫锥菊提取物能明显提高鸡外周血中法氏囊病毒抗体滴度,以及细胞因子IL-2和TNF-α含量,并能改善肉鸡的生产性能。所用3个剂量组中,以B组的0.5 mL/只为最佳的用药剂量。说明紫锥菊提取物具有明显的免疫促进作用。 相似文献
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本试验将240只海兰褐雏鸡随机分为8组,每组30只,分别为紫锥菊复合物高剂量组、中剂量组、低剂量组、中药对照组、西药对照组、疫苗对照组、阴性对照组、健康对照组,采用紫锥菊复合物,将试验鸡人工感染传染性法氏囊病病毒(IBDV)强毒,观察紫锥菊复合物对雏鸡的保护作用。结果表明:紫锥菊复合物可以减弱IBDV强毒对雏鸡免疫器官的损害,对传染性法氏囊病强毒感染雏鸡具有明显的保护作用。 相似文献
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本试验采取随机分组,病理模型复制的方法,将14日龄AA肉雏鸡随机分为紫锥菊复合物组(高、中、低3个剂量)、药物对照组(中药对照组、西药对照组)、疫苗对照组、阴性对照组、健康对照组共8个组,每组30只,以验证紫锥菊复合物对鸡新城疫强度抑制效果。结果表明,紫锥菊复合物对新城疫强毒感染雏鸡具有明显的保护作用,可以用于鸡新城疫的预防和治疗。 相似文献
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This study was undertaken to compile new data on the efficacy of Echinacea in stimulating the immune system of the horse. Use of Echinacea is becoming widespread in horses, despite an absence of controlled laboratory research into its effectiveness or safety. This paper documents results of a double-blind, placebo-controlled, cross-over trial investigating the effect of standardised Echinacea extract on 8 horses. Animals were supplemented with Echinacea or placebo for 42 days, and their response to supplements recorded. Treatment with Echinacea increased phagocytic ability of isolated neutrophils, boosted peripheral lymphocyte counts and appeared to stimulate neutrophil migration from peripheral circulation into the tissues. Echinacea supplement also increased the size and concentration of peripheral red blood cells, and the concentration of haemoglobin and packed cell volume. It was concluded that Echinacea effectively stimulates equine immunocompetence, and the plant extract behaves, in equine subjects, as a haematinic agent, i.e. one which improves the quality of blood by increasing haemoglobin levels and the number of erythrocytes and which, by virtue of their effects on oxygen transport cells, are considered to improve parameters of exercise physiology and performance. 相似文献
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紫锥菊复方对高温条件下蛋鸡生产性能及血液生化指标的影响 总被引:3,自引:3,他引:0
为研究紫锥菊复方对高温条件下蛋鸡生产性能和血液生化指标的影响,选用60周龄海兰褐蛋鸡250只,随机分为5组,试验第1~4组日粮中分别添加0.5%、1%、1.5%的紫锥菊复方和0.04%维生素C,第5组为空白对照组。试验结果表明,1%紫锥菊复方和1.5%紫锥菊复方能够显著提高高温条件下蛋鸡的采食量、产蛋率(P<0.05),降低料蛋比(P<0.05);维生素C对于高温条件下蛋鸡采食量、产蛋率、料蛋比的影响差异不显著(P>0.05),但可降低蛋鸡软破蛋比率和鸡群死淘数;与对照组相比,不同浓度的紫锥菊复方和维生素C均可明显提高血清GLU、TP、ALB水平和ALP活性,降低血清TG、CHO浓度和ALT、CK活性。 相似文献
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研究不同紫锥菊提取物对肉仔鸡免疫功能的影响。将270只1日龄肉仔鸡分为9组,通过测定肉仔鸡生长性能、免疫器官指数、血液生化指标、新城疫抗体滴度以及超氧化物歧化酶(SOD)活性、谷胱甘肽过氧化物酶(GSH-Px)活性和丙二醛(MDA)的含量,探讨不同紫锥菊提取物对肉仔鸡体液免疫、细胞免疫和抗氧化能力的影响。结果显示,日粮中添加进口和康地恩紫锥菊提取物能够显著增加肉仔鸡的平均日增重,降低料重比,提高胸腺和法氏囊指数,并且能够显著改变肉仔鸡的白细胞数、红细胞数及红细胞压积,提高机体的抗氧化能力和新城疫抗体效价,优于万适宁、转移因子和紫锥疫毒清组;紫锥菊提取物组的作用效果均明显优于环磷酰胺组和环磷酰胺+康地恩紫锥菊提取物组,且环磷酰胺+康地恩紫锥菊提取物组的作用比环磷酰胺组好。表明紫锥菊提取物均能够显著增强肉仔鸡的免疫功能,康地恩紫锥菊提取物的总体免疫调节效果与进口紫锥菊提取物的效果一致,均优于国产紫锥菊提取物、万适宁、转移因子和紫锥疫毒清,并且康地恩紫锥菊提取物能够提高由于环磷酰胺引起的免疫水平下降。 相似文献
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Hermann JR Honeyman MS Zimmerman JJ Thacker BJ Holden PJ Chang CC 《Journal of animal science》2003,81(9):2139-2144
The effect of dietary Echinacea purpurea on performance, viremia, and ontogeny of the humoral antibody response against porcine reproductive and respiratory syndrome virus (PRRSV) infection was evaluated in weaned pigs. In three replicates, 120 weaned pigs (25 +/- 1 d of age; 8.46 +/- 0.48 kg of BW) from a PRRSV-naive herd were allotted randomly to one of eight pens (diets) in two separate rooms (four pens/room), with each pen containing five pigs. Pigs began one of four dietary treatments (as-fed basis) 1 wk before inoculation with PRRSV: 1) basal diet composed of corn, soybean meal, whey, and essential vitamins and minerals; 2) basal diet plus carbadox (0.055 g/kg of diet; as-fed basis); 3) basal diet plus Echinacea 2% (2% of the total diet); 4) basal diet plus Echinacea 4% (4% of the total diet). The diets were formulated to be isocaloric and isolysinic. Echinacea purpurea was purchased in powder form and determined by chemical analysis to contain 1.35% cichoric acid (as-fed basis). Seven days after starting the diets, all pigs in one room were intranasally inoculated with PRRSV isolate ATCC VR-2332 at a concentration of 10(4) tissue culture infectious dose50/mL. To monitor the effects of Echinacea and PRRSV challenge, BW and blood samples were obtained from all pigs at 7-d intervals. Serum samples were analyzed for the presence of PRRSV and PRRSV-specific antibodies. All challenged pigs became infected with PRRSV, and all unchallenged pigs remained free of infection. No differences (P > 0.10) in ADG, ADFI, or gain:feed (G:F) were observed in PRRSV-challenged compared with unchallenged animals. For PRRSV-challenged animals receiving diets supplemented with Echinacea at 2 or 4%, no differences (P > 0.10) were observed in ADG, ADFI, or G:F ratio. Among PRRSV-challenged pigs, dietary Echinacea did not affect (P > 0.10) the rate or level of the ELISA-detectable antibody response from d 7 to 42 or the level and duration of PRRSV in serum. For PRRSV-unchallenged animals receiving diets supplemented with Echinacea at 2 or 4%, no differences (P > 0.10) were observed in ADG, ADFI, and G:F ratio. Under the conditions of this study, dietary Echinacea did not enhance growth, exhibit antiviral effects to PRRSV, or show any evidence of immune enhancing properties. 相似文献
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对健康昆明小鼠连续一周灌服不同浓度的紫锥菊根末生药液,观察其对健康昆明小鼠中枢神经系统、呼吸系统和心率的影响,以考察紫锥菊根末的潜在不良反应.结果表明,紫锥菊根末对健康昆明小鼠的中枢神经系统、呼吸系统和心率均无明显影响. 相似文献