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目的：前期对中医温病学中使用频率较高的91味中药及复方进行体外抗内毒素试验研究,筛选到以丹皮、贯众等为主的高效体外抗内毒素作用中药复方3帖,并进行了体内抗内毒素实验研究,筛选到以丹皮、贯众等为主的高效体内抗内毒素作用中药复方。方法：本实验进一步研究筛选出的2个复方对家兔内毒素攻毒热入营血分的保护作用。结果：以丹皮、贯众等为主的方二对内毒素热入营血分证具有极强的保护作用。结论：通过试验研究,以丹皮、贯众等为主,具清热解毒、活血散瘀、凉血止血功能的复方中药对内毒素热入营血分证有明显的保护作用,有望为猪高热综合征的预防和治疗提供新的途经。 相似文献
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抗IBV中药的筛选 总被引：2，自引：0，他引：2
采用气管环组织培养法通过3种加药方式对贯众、黄芩等10种中药及复方组合进行了抗鸡传染性支气管炎病毒的筛选试验,并采用滴鼻法对SPF鸡攻毒建立鸡传染性支气管炎感染模型,应用筛选出的中药复方制剂对其进行预防和治疗试验,并进行病毒毒力测定.不同给药方式显示:将中药与病毒体外作用后接种TOC,除黄芪外,各单味中药和复方组合对IBV均具有不同程度的直接灭活作用,最小有效浓度均达到1/128以上,其中贯众达到1/4 096;在接种IBV前2 h以及接种IBV后2 h给药,黄芩、贯众、板蓝根、鱼腥草及复方中药均能明显抑制IBV的繁殖,最小有效浓度均达到1/256以上,其中贯众效果显著,达到1/2 048.人工感染防治试验显示:治疗组和预防组所分离到的病毒毒力均低于感染组,复方中药对感染传染性支气管炎病毒鸡的保护率为93.33%,治愈率为75%.表明该复方中药对鸡传染性支气管炎具有良好的预防作用和治疗作用,且预防效果强于治疗效果. 相似文献
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14种中药及其组方对临床常见致病菌的抑菌作用 总被引：4，自引：0，他引：4
观察了诃子、黄连、黄芩、五味子、紫花地丁、金银花、栀子、柴胡、大黄、郁金、穿心莲、白头翁、陈皮、苦参等14味中药及其组方的水煎剂对金黄色葡萄球菌、大肠杆菌、巴氏杆菌等临床常见致病菌的体外抑菌作用,以及对鸡体内大肠杆菌-巴氏杆菌联合攻毒保护作用的差异。结果表明:诃子、五味子、黄连、黄芩、金银花、柴胡对大肠杆菌有明显抑制作用;黄连、黄芩、诃子、大黄、五味子、金银花对巴氏杆菌抑制作用较好;黄芩、大黄、诃子、黄连、五味子对金黄色葡萄球菌体外抑菌作用明显。由上述药物为主药组成的中药方剂(方1~方3)的体外抑菌作用弱于单味药,但对体内大剂量细菌攻毒的保护作用强于单味药,且以方1、方2作用更好。 相似文献
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目的:以仔猪为靶动物,考察复方中药口服液对仔猪腹泻的治疗作用。方法:未吮初乳的新生仔猪用PEDV(小肠及内容物)灌胃攻毒,制造仔猪病理模型,出现典型腹泻症状后灌服复方中药口服液进行治疗,观察并记录各试验处理仔猪精神、呕吐、腹泻、死亡情况以及病理解剖特征。结果:仔猪用病料攻毒后18 h出现腹泻;复方中药口服液治疗48 h后,腹泻得到较好的控制。结论:复方中药口服液对仔猪具有较好的保护作用,主要表现在对小肠以及肝、胆的保护作用,作用机理明确,临床疗效确切,可望为高死亡率吮乳仔猪腹泻的防控提供新的途经和有效方法。 相似文献
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《黑龙江畜牧兽医》2014,(1)
为了研究猪大肠杆菌融合菌株R2蜂胶灭活苗的免疫效果,试验以猪大肠杆菌原生质体融合菌株R2为菌种制备蜂胶灭活苗,采用肌肉注射方式免疫SPF小白鼠,以间接ELISA方法检测血清中IgG抗体水平,同时用2种不同血清型的猪大肠杆菌亲本菌株与免疫血清做玻片凝集试验,并对小白鼠进行攻毒保护试验。结果表明:该疫苗免疫性能较好,在免疫小白鼠后的第28,35天左右机体内的抗体水平达到最高值,融合菌株R2蜂胶灭活苗可对2种不同血清型的猪大肠杆菌亲本菌株的攻毒试验产生保护,而且安全性能良好,是一种效果较好的菌苗。说明融合菌株R2蜂胶灭活苗作为一种新型疫苗防控猪大肠杆菌病将成为一种可能。 相似文献
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以牦牛鞭为主,辅以其他中药制成中药复方壮腰散,分别饲喂小白鼠,观察其对小鼠睾丸发育和抗缺氧、抗疲劳、腹腔巨噬细胞吞噬能力的影响。结果表明,单用牦牛鞭能促进小白鼠睾丸发育和增强其免疫力;牦牛鞭配以其他中药组成复方,不仅能促进睾丸发育,而且对提高小鼠的抗缺氧能力、抗疲劳能力均有显著作用。 相似文献
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几种中草药复方对柔嫩艾美耳球虫感染鸡的防治效果 总被引：1，自引：0，他引：1
该试验根据常用抗球虫中药自拟3组中草药复方:①黄芩、黄柏、大黄;②青蒿、常山、柴胡、黄连、黄柏、苦参、黄芪、炒地榆、仙鹤草;③白头翁、黄柏、黄连、栀子、厚朴、枳壳、黄芩、炒地榆、仙鹤草。各复方分别以汤剂和散剂两种剂型给药,除空白对照组和攻毒对照组外,各试验组鸡群自攻毒前2d起连续给药9d。试验结束后计算各试验组的抗球虫指数(ACI)表明,复方2能够在一定程度上减轻球虫感染鸡的病变与死亡率,具有一定的抗球虫作用。 相似文献
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应用鸡胚接种试验研究中草药的抗新城疫病毒作用 总被引：1，自引：0，他引：1
为了筛选出高效的抗新城疫病毒(Newcastle disease virus,NDV)中草药,采用鸡胚接种试验测定了常用清热解毒中草药的体外抗NDV作用.结果表明矮地茶、侧柏叶、贯众、诃子、虎杖、白蔹、夏枯草、黄连对新城疫病毒具有较好的杀灭作用. 相似文献
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桦木酸对小鼠血液指标及免疫器官指数的影响 总被引：1，自引：0，他引：1
目的:研究桦木酸对小鼠血液指标的影响。方法:将健康昆明系小鼠28只,随机分为空白对照组及桦木酸0.25、0.5、1.0mg/mL组,灌胃给药,1次/d,连续14d。后检测桦木酸对小鼠免疫器官指数、血液指标以及血清溶菌酶活性的影响。结果:桦木酸能提高机体的免疫器官指数;使白细胞、淋巴细胞、红细胞数目等血液指标显著升高,并呈现量效关系;桦木酸还能够提高血清溶菌酶活性(P0.01)。结论:桦木酸对小鼠血液指标及免疫器官指数升高有积极作用。 相似文献
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脂多糖(Lps)是一类具有高度活性的大分子物质,可依赖LBP/CD14系统作用于细胞,特别是单核细胞、巨噬细胞和中性粒细胞(PMNS)等通过一系列胞内信号传导系统诱导细胞产生多种生物活性分子,如:TNF-α,白介素,前列腺素等,在革兰氏阴性菌感染的发病机制中扮演着十分重要的角色,其可激活损伤血管内皮细胞,引起机体产生局部炎症反应和弥散性血管内凝血(DIC)等病理反应,引起发热,呼吸窘迫综合症,心肺功能严重损害及多器官功能衰竭(MOF),甚至引发致死性休克,因此全面了解内毒素的作用机制,研究有效的内毒素拮抗剂,对预防和治疗内毒素(ET)性疾病有重要意义。 相似文献
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雏鸡肠炎沙门菌病是肠炎沙门菌及其内毒素共同作用的结果。为了研究白鸡屎藤挥发油抗肠炎沙门菌及其内毒素的作用,本试验测定了白鸡屎藤挥发油抗肠炎沙门菌的效果,进一步提取了肠炎沙门菌内毒素并测试了白鸡屎藤挥发油对肠炎沙门菌内毒素的体外灭活作用和对肠炎沙门菌内毒素致热的解热作用,同时本试验还对白鸡屎藤挥发油进行了定性定量分析并测试了白鸡屎藤挥发油及其主要药理活性成分的药动学特征。结果显示,白鸡屎藤挥发油包括丁香酚、樟脑、龙脑、水杨酸甲酯等活性成分,在中剂量（100mL／L）、高剂量（150mL／L）均表现出较强的体外抑菌效果,25mL／L以上浓度即可表现出较强的灭活内毒素作用,并且2～4h大部活性成分进入血液循环,表现出显著的解热作用。结果表明,白鸡屎藤挥发油具有一定的抗菌、抗内毒素和解热作用,可以用于雏鸡肠炎沙门菌感染性发热病的治疗。 相似文献
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The morbidity and mortality associated with canine parvovirus disease (CPV) is caused, in part, by endotoxin (LPS). Equine anti-endotoxin hyperimmune plasma (Anti-LPS) was administered to 89 CPV patients in addition to conventional therapy. In Anti-LPS treated CPV patients mortality was lower (16-8 per cent, 15/89) than in controls that received conventional therapy alone (66-7 per cent, 24/36, P < 0–0005). The hospitalization period of survivors was reduced from 8-5 ± 4-0 days (controls) to 5-2 ± 2-0 days (Anti-LPS treated group). These results suggest that an anti-endotoxin specific therapy should be incorporated into the treatment regimen of CPV, and possibly, other canine enteric disorders, known to produce endotoxaemia. 相似文献
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Effects of endotoxin on carbohydrate metabolism were studied in A/HeJ (endotoxin-sensitive) and C3H/HeJ (endotoxin-resistant) inbred mice. A/HeJ mice developed hypoglycemia within two hours after endotoxin injection, yet liver glycogen content did not differ from controls. Similarly treated C3H/HeJ mice did not develop significant hypoglycemia. Administration of glucagon to endotoxin-treated A/HeJ mice failed to elevate their blood glucose concentrations, while endotoxin-treated mice of the same strain did respond to dibutyryl cyclic AMP with a significant elevation of blood glucose. C3H/HeJ mice on the other hand responded to glucagon and dibutyryl cyclic AMP with elevated blood glucose. Endotoxin-treated C3H/HeJ but not A/HeJ mice were able to carry out gluconeogenesis induced by prednisolone, while both inbred strains showed active glycogenesis after administration of an exogenous glucose load. Administration of glucagon resulted in diminished liver glycogen concentrations in A/HeJ endotoxin-treated mice suggesting no impairment of glycogenolysis. The inability of endotoxin-treated A/HeJ mice to respond to glucagon could be due to impairment of gluconeogenesis. Although endotoxin interfered with the capacity of both inbred strains to respond to glucagon administration with elevation of liver cyclic AMP, the effect was significantly more severe in A/HeJ mice. The susceptibility of A/HeJ mice to the lethal effect of endotoxin may be related to the apparent sensitivity of carbohydrate metabolic pathways to disturbance by endotoxin. 相似文献
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Bovine blood neutrophil acyloxyacyl hydrolase (AOAH) activity during endotoxin and coliform mastitis
The dynamics of blood neutrophil acyloxyacyl hydrolase (AOAH) activity, the appearance of endotoxin (lipopolysaccharide, LPS) in blood and the role of blood neutrophil AOAH in the severity of Escherichia coli and endotoxin mastitis were investigated in early postpartum dairy cows experimentally challenged with either endotoxin (n = 6) or E. coli (n = 6). The AOAH activity of blood neutrophils started to decrease significantly at post challenge hours (PCH) 6-24 and 12-24 in the endotoxin and E. coli-challenged groups, respectively; it returned to pre-challenged values at PCH 48 in both endotoxin- and E. coli-challenged groups. The cows were classified as moderate and severe responders according to milk production loss in the non-challenged quarters at PCH 48. There were no severe responders in the endotoxin-challenged group. In the E. coli-challenged group, only 1 severe responder was identified. The pre-challenge neutrophil AOAH activity of the severe responder was approximately 30% lower than that of moderate responders. No LPS was detected in the plasma of endotoxin-challenged cows; neither was it found in the plasma of moderate responders in the E. coli-challenged group at any PCH. However, at PCH 6, a remarkable amount of LPS was detected in the plasma of the severe responder from the E. coli-challenged group. Furthermore, neutrophil AOAH activity was increased by approximately 70% in the severe responder at PCH 6, but it increased by only approximately 15% in moderate responders. This was followed by a decreased neutrophil AOAH activity at PCH 12-24 and 24-72 in moderate and severe responders, respectively; the decreased AOAH activity at those PCH was more pronounced in the severe responder. The pronounced decreased neutrophil AOAH activity during mastitis often coincided with extreme leukopenia, neutropenia and a maximal number of immature neutrophils in the blood. Our results demonstrate that a decrease in neutrophil AOAH activity results in the appearance of LPS in the blood, and low blood neutrophil deacylation activity could be considered as a risk factor for severe clinical coliform mastitis. 相似文献
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Kokosharov T 《The Onderstepoort journal of veterinary research》2000,67(4):297-300
Bacterial colonization and endotoxin production were investigated before and after experimental Salmonella gallinarum infection in 8-week-old female broiler chickens. These parameters were assayed by means of colony forming units test (CFU) and the Limulus Amebocyte Lysate test (LAL), respectively. Birds were infected per os with 1,5 x 10(9) CFU/ml of wild strain of S. gallinarum isolated from a dead hen. Approximately 1,5 x 10(2); 1,3 x 10(2) and 1,2 x 10(2) CFU of S. gallinarum were recorded from 1 g of liver, 1 g of spleen and 1 ml of blood from the chickens on day 1 post infection. By day 4 corresponding data were 3,7 x 10(4); 4,8 x 10(3) and 1,1 x 10(3) respectively and on day 7 10(5) CFU were present in all three specimen types. The liver and spleen of dead birds were contaminated with more than 10(7) CFU per g. The endotoxin from S. gallinarum was found to have an activity of 1,5; 12,0 and 15,0 endotoxin units (EU)/ml on day 1, 4 and 7 after infection, respectively. No endotoxin activity was established in the blood of the control group (before infection) by the LAL test. This is the first time the connection between the amount of live S. gallinarum in the blood, liver and the circulating level of endotoxin in the blood during the infectious stage of experimental acute fowl typhoid, has been demonstrated. 相似文献