共查询到19条相似文献，搜索用时 187 毫秒
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用血清药理学方法,观察七味胆膏汤的体内抑菌作用,并探讨七味胆膏汤的最佳采血时间。七味胆膏汤给大耳白兔连续3d灌胃给药,最后一次给药后0．5、1、2、4h取血,制备含药血清,观察对大肠杆菌、志贺氏痢疾杆菌、金黄色葡萄球菌、链球菌的抑菌作用。结果表明：七味胆膏汤含药血清对大肠杆菌、志贺氏痢疾杆菌、金黄色葡萄球菌、链球菌均有抑菌作用,与对照组相比差异极显著（P〈0．01）,且大肠杆菌、金黄色葡萄球菌、链球菌2h组与其它各试验组相比差异显著（P〈0．05）,说明口服给药2h组抑菌作用最强．为给药后嚣仕采血时间. 相似文献
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白头翁汤含药血清抑菌作用观察 总被引：2，自引：0，他引：2
白头翁汤处方根据<中华人民共和国兽药典>(2005年版),由白头翁、黄连、黄柏、秦皮4味中药组成,具有清热燥湿、凉血止痢之功效,其主要成分为生物碱类、香豆素类、皂苷类和柠檬苦素类化合物[1],为湿热痢疾的首选方剂,关于白头翁汤的体外抑菌试验已有许多文献报道[2],但体外抑菌实验不能真实反映药物在体内抑菌的真实情况[3],为此,我们采用血清药理学实验方法,探讨白头翁汤对大肠杆菌、金黄色葡萄球菌、肺炎球菌、链球菌、李氏杆菌等5种细菌的抑菌作用和给药后含药血清的最佳采血时间. 相似文献
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为了探讨唾液乳杆菌的生长特性及抑菌作用,测定2株唾液乳杆菌的生长曲线,并选用口腔变形链球菌、牙龈卟啉单胞菌及金黄色葡萄球菌为指示菌,采用牛津杯法进行体外抑菌实验.结果表明:2株唾液乳杆菌分别在接种2h和4h进入对数生长期,8h进入对数生长末期,14h和16h进入稳定期;2株唾液乳杆菌菌液及代谢产物对口腔变形链球菌、牙龈卟啉单胞菌及金黄色葡萄球菌均有抑菌作用,对口腔变形链球菌及牙龈卟啉单胞菌的抑菌作用强于金黄色葡萄球菌;2株唾液乳杆菌菌体及调整pH值为7.0的代谢产物没有抑菌作用;2株唾液乳杆菌的抑菌能力主要来自菌体的代谢产物,代谢产物中起抑菌作用的成分为酸或酸依赖性物质. 相似文献
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通过本试验结果证明,绿消炎宝对大肠杆菌、巴氏杆菌、金黄色葡萄球菌、溶血性链球菌有较强的抑菌作用.为监床应用该药提供了理论依据。 相似文献
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氟苯尼考及其与多西环素联合的体外抗菌作用 总被引：15，自引：0，他引：15
对氟苯尼考 (Florfenicol)及其与多西环素 (Doxycycline)联合的体外抗菌活性、杀菌动力学曲线和抗菌后效应(PAE)作了研究。结果表明 :氟苯尼考对鸡大肠杆菌等 9种标准菌株最小抑菌浓度 (MIC)为 0 .2～ 1.6 mg/L ,与氯霉素相似或略低 ,比甲砜霉素低 1/2～ 1/80 ;对耐氯霉素、甲砜霉素的鸡大肠杆菌、鸡白痢沙门氏菌和猪大肠杆菌临床分离株仍有较强抗菌作用 ;对鸡大肠杆菌和金黄色葡萄球菌的杀菌动力学曲线与甲砜霉素相似 ,表现为低浓度抑菌 (小于 4 MIC值 )、高浓度缓慢杀菌 ;对鸡大肠杆菌和金黄色葡萄球菌的 PAE显著长于甲砜霉素 (P<0 .0 5 ) ,呈浓度依赖性 ,对鸡大肠杆菌的 PAE(1.4 5～ 2 .0 7h)显著长于对金黄色葡萄球菌 (0 .4 8～ 1.18h)。棋盘法测得氟苯尼考与多西环素联合对鸡大肠杆菌、鸡白痢沙门氏菌、猪链球菌和金黄色葡萄球菌均为无关作用 ,对前 3种菌的部分抑菌浓度(FIC)指数值为 1.5 ,联合时的氟苯尼考 MIC值比其单独时减小了 1/2。氟苯尼考以 1∶ 2与多西环素联合时 ,对鸡大肠杆菌和金黄色葡萄球菌的杀菌速率与氟苯尼考单药相比均有所增加 ,当浓度大于或等于 4 MIC时呈现出协同作用 ;对鸡大肠杆菌和金黄色葡萄球菌的 PAE与单药 PAE的较大值相近 ,与相应浓度的单药相比均表现为无关作用。 相似文献
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《畜牧与饲料科学》2017,(3)
旨在探讨蒙药成分复方对乳房炎模型小鼠的治疗作用。利用乳腺内注射大肠杆菌和金黄色葡萄球菌混合菌悬液的方法制备小鼠乳房炎病理模型;模型制备24 h后,阳性对照组、阴性对照组、蒙药成分复方组分别灌胃环丙沙星、生理盐水、蒙药成分复方水溶液,连续给药3 d,每天1次;于注射菌液后24 h(治疗前)和给药后72 h(治疗后),观察各组小鼠的临床症状、组织病理学变化,测定母鼠乳腺组织匀浆中的TNF-α、IL-6含量和乳腺内菌落数。结果表明,蒙药成分复方可以修复由大肠杆菌和金黄色葡萄球菌感染所造成的乳腺组织损伤,显著降低乳房炎模型小鼠乳腺组织中的TNF-α、IL-6含量和乳腺菌落数(P0.05)。蒙药成分复方可以治疗由大肠杆菌和金黄色葡萄球菌混合感染引起的小鼠乳房炎。 相似文献
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为探讨乳黄消口服液滋阴、扶正及祛邪的功效,本研究观察乳黄消口服液对阴虚模型大鼠临床症状、饮食量、饮水量、体重、胸腺指数、脾脏指数、总三碘甲状腺原氨酸(T_3)、总甲状腺素(T_4)和促甲状腺激素(TSH)含量的影响,以及对小鼠巨噬细胞吞噬功能及对大肠杆菌、金黄色葡萄球菌、无乳链球菌和副乳房链球菌抑制作用的影响。结果显示,试验组大鼠在乳黄消口服液给药后精神正常,易抓取,但被毛光泽仍较差,有脱毛现象,大便正常。与模型组相比,试验组大鼠体重(P0.05)、胸腺指数(P0.05)、脾脏指数(P0.05)、TSH含量(P0.05)上升,饮食量(P0.05)、T_3(P0.05)、T_4含量(P0.05)下降,但均与阴性对照组差异不显著(P0.05);与模型组相比,试验组大鼠饮水量显著下降(P0.05),但仍显著高于阴性对照组(P0.05)。乳黄消口服液给药后高、中、低剂量组与阴性对照组间吞噬指数均差异显著(P0.05),乳黄消口服液高、中剂量组与阴性对照组相比吞噬百分比差异显著(P0.05);乳黄消口服液对大肠杆菌、金黄色葡萄球菌、无乳链球菌及副乳房链球菌的最小抑菌浓度(MIC)分别为12.50、1.56、0.20和0.39 mg/mL。综上所述,乳黄消口服液可改善大鼠阴虚临床症状,增强巨噬细胞吞噬功能,抑制奶牛乳房炎主要病原菌,具滋阴、扶正和祛邪的功效,可用于奶牛乳房炎的治疗。 相似文献
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研究天然化合物肉桂醛对奶牛乳房炎主要致病菌——大肠杆菌、金黄色葡萄球菌和链球菌的抑菌效果。采用试管二倍稀释法测得肉桂醛对奶牛乳房炎主要致病菌金黄色葡萄球菌和标准金黄色葡萄球菌的体外最小抑菌浓度(MIC)分别为3.2 mmol/L和1.6 mmol/L;链球菌1.6 mmol/L;大肠杆菌和标准大肠杆菌6.4 mmol/L和3.2 mmol/L,且能完全抑制这三种菌的生长。肉桂醛的最小杀菌浓度(MBC)金黄色葡萄球菌和标准金黄色葡萄球菌分别为25.6 mmol/L和12.8 mmol/L;链球菌12.8 mmol/L;大肠杆菌和标准大肠杆菌25.6 mmol/L和12.8 mmol/L;在7 h内能有效杀灭这三种菌,肉桂醛对奶牛乳房炎主要致病菌有抑菌和杀菌能力,是一种潜在的奶牛乳房炎的临床治疗药物。 相似文献
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LIU Tao PENG Xiao-feng LIU Cui PAN Chun-hui YANG Dan ZHANG Wen-jing DENG Yan-jun XU Yu-ling 《中国畜牧兽医》2017,44(9):2822-2828
The study was aimed to investigate the in vitro and in vivo efficacy of Ruxiankang injection.The Oxford cup method was took to study the antibacterial activity in vitro of Ruxiankang injection;Six classical pharmacological models which were hot plate method, acetic acid inducing writhing, xylene inducing ear edema,egg white inducing paw edema, fever in rats induced by 2,4-dinitrophenol and dried yeast were adopted to study the analgesic, anti-inflammatory and antipyretic effects of Ruxiankang injection.The results showed that Ruxiankang injection had significant inhibitory effect in vitro on Escherichia coli and Staphylococcus aureus; And among them, middle and high dose groups could extremely significantly increase the pain threshold of mice and reduce the writhing times of mice (P<0.01);Middle dose group could significantly reduce the degree of ear swelling induced by xylene and foot metatarsus swelling by egg white in mice (P<0.05);Middle and high dose groups had significant antipyretic effect caused by 2, 4-dinitrophenol fever at 1.5 to 2.0 and 3.0 to 3.5 h and dry yeast at 1.0 to 3.5 h (P<0.05).The results indicated that Ruxiankang injection could obviously inhibit Escherichia coli and Staphylococcus aureus activity and had remarkable antipyretic analgesic and anti-inflammatory effects. 相似文献
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为探讨乳黄消口服液滋阴、扶正及祛邪的功效,本研究观察乳黄消口服液对阴虚模型大鼠临床症状、饮食量、饮水量、体重、胸腺指数、脾脏指数、总三碘甲状腺原氨酸(T_3)、总甲状腺素(T_4)和促甲状腺激素(TSH)含量的影响,以及对小鼠巨噬细胞吞噬功能及对大肠杆菌、金黄色葡萄球菌、无乳链球菌和副乳房链球菌抑制作用的影响。结果显示,试验组大鼠在乳黄消口服液给药后精神正常,易抓取,但被毛光泽仍较差,有脱毛现象,大便正常。与模型组相比,试验组大鼠体重(P>0.05)、胸腺指数(P>0.05)、脾脏指数(P>0.05)、TSH含量(P<0.05)上升,饮食量(P<0.05)、T_3(P<0.05)、T_4含量(P>0.05)下降,但均与阴性对照组差异不显著(P>0.05);与模型组相比,试验组大鼠饮水量显著下降(P<0.05),但仍显著高于阴性对照组(P<0.05)。乳黄消口服液给药后高、中、低剂量组与阴性对照组间吞噬指数均差异显著(P<0.05),乳黄消口服液高、中剂量组与阴性对照组相比吞噬百分比差异显著(P<0.05);乳黄消口服液对大肠杆菌、金黄色葡萄球菌、无乳链球菌及副乳房链球菌的最小抑菌浓度(MIC)分别为12.50、1.56、0.20和0.39 mg/mL。综上所述,乳黄消口服液可改善大鼠阴虚临床症状,增强巨噬细胞吞噬功能,抑制奶牛乳房炎主要病原菌,具滋阴、扶正和祛邪的功效,可用于奶牛乳房炎的治疗。 相似文献
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建立伴大豆球蛋白酶解产生抑菌肽的最适条件,对酶解产物进行分离纯化后进一步测定其抑菌活性。采用复合风味蛋白酶水解伴大豆球蛋白,测定不同时间的酶解液对大肠杆菌和金黄色葡萄球菌的抑菌活性。结果显示:2 h水解产生的酶解肽具有抑菌活性,其对大肠杆菌和金黄色葡萄球菌的最小抑菌浓度分别是2.6和3.2 mg/mL。2 h水解液经Sephadex-G15分离纯化,采用平板计数法鉴定各组分。结果显示:CP2组分对大肠杆菌具有显著的抑制作用(P<0.05)。本研究证明伴大豆球蛋白的复合风味蛋白酶酶解肽具有一定的抑菌活性。 相似文献
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Petzl W Zerbe H Günther J Yang W Seyfert HM Nürnberg G Schuberth HJ 《Veterinary research》2008,39(2):18
The outcome of an udder infection is influenced by the pathogen species. We established a strictly defined infection model to better analyze the unknown molecular causes for these pathogen-specific effects, using Escherichia coli and Staphylococcus aureus strains previously asseverated from field cases of mastitis. Inoculation of quarters with 500 CFU of E. coli (n = 4) was performed 6 h, 12 h, and 24 h before culling. All animals showed signs of acute clinical mastitis 12 h after challenge: increased somatic cell count (SCC), decreased milk yield, leukopenia, fever, and udder swelling. Animals inoculated with 10 000 CFU of S. aureus for 24 h (n = 4) showed no or only modest clinical signs of mastitis. However, S. aureus caused clinical signs in animals, inoculated for 72 h-84 h. Real-time PCR proved that E. coli inoculation strongly and significantly upregulated the expression of beta-defensins, TLR2 and TLR4 in the pathogen inoculated udder quarters as well as in mammary lymph nodes. TLR3 and TLR6 were not significantly regulated by the infections. Immuno-histochemistry identified mammary epithelial cells as sites for the upregulated TLR2 and beta-defensin expression. S. aureus, in contrast, did not significantly regulate the expression of any of these genes during the first 24 h after pathogen inoculation. Only 84 h after inoculation, the expression of beta-defensins, but not of TLRs was significantly (> 20 fold) upregulated in five out of six pathogen inoculated quarters. Using the established mastitis model, the data clearly demonstrate a pathogen-dependent difference in the time kinetics of induced pathogen receptors and defense molecules. 相似文献
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Jacobsen S Niewold TA Kornalijnslijper E Toussaint MJ Gruys E 《Veterinary immunology and immunopathology》2005,104(1-2):21-31
The aim of the present study was to characterise the serum amyloid A (SAA) response to intramammary inoculation of Escherichia coli and to examine the distribution of hepatically and extrahepatically produced SAA isoforms in plasma and milk from cows with mastitis. Milk and plasma SAA concentrations were determined before and after experimental induction of E. coli mastitis in six dairy cows. The milk SAA response was characterised by low or undetectable levels before inoculation, very rapid and large increases in concentration after inoculation, and rapid decline towards baseline levels after resolution of disease. In plasma from cows with experimentally induced E. coli mastitis, four hepatically derived SAA isoforms with apparent isoelectric point (pI) values of 5.8, 6.2, 6.8 and 7.4 were demonstrated by denaturing isoelectric focusing. In milk three highly alkaline isoforms with apparent pI values above 9.3 appeared 12 h post-inoculation. These isoforms were not present in any of the plasma samples, and it therefore seems likely that they were locally produced, tissue-specific isoforms. At 24-36 h post-inoculation one or more acidic isoforms corresponding to those found in plasma appeared in the milk samples. The isoforms demonstrated in plasma from cows with E. coli mastitis were also present in serum obtained from three cows with clinical Streptococcus uberis mastitis. In conclusion, experimentally induced E. coli mastitis is accompanied by a prominent SAA response. The results of the present study indicate that SAA accumulation in mastitic milk is the result of both local synthesis of SAA and of hepatically derived SAA gaining access to the milk due to increased permeability of the blood-milk barrier. 相似文献
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Lin WY Tsai SC Hung GU Kwan PC Lin CF Yuan CS Lin YC 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(1):43-49
In clinical medicine improved diagnostic methods for the detection of infection are needed. A good infectious animal model is very important for the development of a new diagnostic method or drug. The purpose of this study was to establish a good animal model with soft tissue infection. Twenty-four SD rats were divided into four groups (6 in each group). Various bacilli including Staphylococcus aureus (S. aureus), Streptococcus pneumoniae (S. pneumoniae), and Escherichia coli (E. coli) were injected intramuscularly into the left caudal thighs of three groups of rats to create soft tissue infection. In addition, normal saline was injected into the left caudal thighs of ten rats which were used as controls. Before and 48 hr after inoculation of the bacilli, a blood sample (0.5 ml) was taken from each rat and analyzed to determine the white blood cell count and differentiated cell count. In addition, 48 hr after the inoculation, 0.2 mCi of gallium-67 was injected via the tail vein. Gallium scan was performed at 24 hr and 48 hr after administration of the radiotracer. The dorsal view of both hind legs was imaged and analyzed by computers to calculate the lesion-to-normal (L/N) ratio. After imaging, all rats were sacrificed and specimens from portions of the infected thigh muscle were sent for histopathologic investigation to confirm the infection. The increase in both the WBC counts and the segmented polymorphonuclear leukocytes (PMNs) were most significant in the S. aureus group, followed by the S. pneumoniae group, E. coli group and normal control groups. The rats with S. aureus infection had significant gallium uptake at the site of infection and the highest L/N ratio of 2.14 on the 24-hr image and 2.0 on the 48-hr image. The rats with S. pneumoniae had the second highest L/N ratio (1.41 at 24 hr, and 1.48 at 48 hr). The L/N ratio for the E. coli group was 1.27 at 24 hr and 1.35 at 48 hr. No obviously abnormal gallium uptake was demonstrated in the normal controls. We conclude that all three bacilli induced a soft tissue infection in SD rats. S. aureus resulted in the most significant infectious signs. 相似文献