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蚯蚓体腔液及粗组分体外抗菌特性 总被引：1，自引：0，他引：1
利用钢圈法测定蚯蚓体腔液对大肠杆菌(Escherichiacoli)、绿脓杆菌(pseudomonasaeruginosa)和枯草芽孢杆菌(Bacillussubtilis)的抑制作用,并利用微量平板稀释法测定蚯蚓体腔液对绿浓杆菌的最低抑菌浓度.结果如下蚯蚓体腔液对枯草芽孢杆菌和大肠杆菌没有抑制作用、对绿脓杆菌有抑制作用,浓度为0.1g/ml时绿脓杆菌的抑菌圈直径为1.53cm;蚯蚓体腔液对绿脓杆菌的最低抑菌浓度(MIC)为6.25mg/mL.体腔液用85%的硫酸铵沉淀、截留分子量为10kDa和1kDa的超滤膜进行超滤,得到分子量分别为大于10kDa、1kDa～10kDa、小于1kDa的三种组分ECP1、ECP2、ECP3.用钢圈法测定了ECP1、ECP2、ECP3对绿脓杆菌的抑制作用,其中ECP3的抑菌作用最强,ECP1、ECP2和ECP3的抑菌圈直径分别为7.68mm、11.44mm和16.8mm.ECP3对绿脓杆菌的最低抑菌浓度为0.018mg/mL. 相似文献
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《现代畜牧兽医》2021,(8)
试验以琼脂孔洞法测定中药水提物对枯草芽孢杆菌的抑菌效果,二倍稀释法确定其最小抑菌浓度(MIC)、最小杀菌浓度(MBC),并测定不同pH值条件下的抑菌作用。结果表明:在中药浓度为1 g/mL的情况下,艾叶、虎杖、乳香、麻黄对枯草芽孢杆菌的抑菌圈分别为25.10、19.26、28.92、21.66 mm;艾叶、虎杖、乳香、麻黄对枯草芽孢杆菌的体外MIC分别为15.62、31.25、3.90、125.00 g/L;MBC分别为62.50、125.00、15.62、250.00 g/L。艾叶、虎杖、乳香、麻黄在pH值为3～7时,对枯草芽孢杆菌仍具有高的抑菌活性。这4种中药可有效抑制和杀灭枯草芽孢杆菌。 相似文献
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《黑龙江畜牧兽医》2020,(18)
为了研究芽孢杆菌制剂对兔致病性大肠杆菌和沙门氏杆菌的抑制作用,试验采用琼脂扩散的方法测定枯草芽孢杆菌、凝结芽孢杆菌制剂培养液分别与兔致病性大肠杆菌和沙门氏杆菌共同培养后产生抑菌圈的大小。结果表明:从枯草芽孢杆菌制剂分离出的3种菌落的培养液对致病性兔大肠杆菌和沙门氏杆菌生长均有抑制作用,但是抑菌活性有差异性。凝结芽孢杆菌制剂分离出的3种菌落培养液中,仅有2种菌落培养液对兔致病性大肠杆菌和沙门氏杆菌生长均有抑制作用,另外1种仅对部分兔致病性大肠杆菌生长有抑制作用,对兔致病性沙门氏杆菌生长无抑制作用。说明芽孢杆菌制剂确实对兔致病性大肠杆菌和沙门氏杆菌的生长有抑制作用,但是抑制强度有差异。 相似文献
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试验旨在探究黑豆种皮多酚的超声辅助提取工艺及抑菌效果。以黑豆为原材料，以黑豆种皮多酚提取率为响应值，选取乙醇浓度、料液比、提取时间、超声功率为考察因素，采用响应面法对黑豆种皮多酚提取工艺进行优化，同时使用滤纸圆片法测定黑豆种皮多酚对大肠杆菌和枯草芽孢杆菌的抑制效果。结果表明：当乙醇浓度为60%、料液比为1:25(g/mL)、提取时间为65 min、超声功率为400 W时，黑豆种皮多酚提取率最高，为（11.26±0.08）mg/g，与理论值接近，说明经过响应面法优化分析得出的模型是可用的。通过对抑菌圈观察发现，当多酚浓度>0.050 mg/mL时，黑豆种皮多酚对大肠杆菌和枯草芽孢杆菌有一定的抑制作用。 相似文献
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本试验以枯草芽孢杆菌和大肠杆菌为供试菌,采用滤纸片法研究辣椒碱对细菌的作用效果。试验一结果显示：辣椒碱对枯草芽孢杆菌、大肠杆菌都有抑菌作用。在浸置3 h时,对于枯草芽孢杆菌,当辣椒碱浓度低于1 mg/mL时,辣椒碱对枯草杆菌的抑菌作用随浓度增加而加强,1 mg/mL时抑菌圈直径达到最大,而浓度大于1 mg/mL时,随浓度增加作用效果减弱;而对于大肠杆菌而言,在浓度为0.125～3 mg/mL时,辣椒碱的抑菌效果随浓度增加显著加强（P <0.05）。试验二结果显示：在辣椒碱浓度为1 mg/mL时,对枯草芽孢杆菌的作用效果随浸置时间延长出现降低趋势;而对于大肠杆菌,在同一浸置时间辣椒碱的作用效果为3 mg/mL>2 mg/mL>1 mg/mL,而对于同一辣椒碱浓度,随着浸置时间延长,作用效果增强。辣椒碱在浓度低于1 mg/mL时对枯草芽孢杆菌随浓度增加而增强;浓度大于1 mg/mL时,出现减弱趋势;辣椒碱对大肠杆菌抑菌效果在浓度为0.125～3 mg/mL时随浓度增加而增强,且随浸置时间延长抑菌效果增强。 相似文献
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本试验应用琼脂平板打洞法、试管稀释法和平板培养法测定溪黄草和桉树叶煎剂对大肠杆菌、金黄色葡萄球菌、蜡状芽孢杆菌、枯草芽孢杆菌、链球菌等几种常见病原菌的体外抑制作用。结果显示,溪黄草煎剂对大肠杆菌、金黄色葡萄球菌、蜡状芽孢杆菌、枯草芽孢杆菌、链球菌均显示高度敏感,最小抑菌浓度(MIC)分别为1/80、1/320、1/160、1/80、1/80,最小杀菌浓度(MBC)分别为1/80、1/80、1/160、1/40、1/80;桉树叶煎剂对大肠杆菌、金黄色葡萄球菌、蜡状芽孢杆菌、枯草芽孢杆菌、链球菌均显示高度敏感,最小抑菌浓度(MIC)分别为1/80、1/80、1/40、1/160、1/40,最小杀菌浓度(MBC)分别为1/80、1/80、1/10、1/40、1/20。结果表明,溪黄草和桉树叶煎剂对常见的多种细菌均有较强的抑菌作用。 相似文献
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味蒙药对种仇清型牛源致病性大肠杆菌体外抑菌及联合抑菌效果的研究 《畜牧与饲料科学》2018,39(10):102-107
为研究蒙药对3种血清型牛源致病性大肠杆菌（Escherichia coli，E. coli）的体外抑菌效果，采用牛津杯法测定16味蒙药对受试菌株的抑菌圈直径，利用微量稀释法结合平板法测定最小抑菌浓度（MIC）和最低杀菌浓度（MBC），采用棋盘法测定敏感蒙药的协同指数（FICI）。结果表明，乌里史古—达兰—哈力苏、协日—洪连、乌拉勒吉嘎纳对3种血清型大肠杆菌的抑菌圈直径为16.10-29.64 mm，MIC为7.81-31.25 mg/mL，MBC为15.63-125 mg/mL。联合抑菌试验结果表明，乌拉勒吉嘎纳与协日—洪连，舒布格日—希木勒德格与呼仍—图如对E. coli O26的FICI为0.50，乌拉勒吉嘎纳与乌里史古—达兰—哈力苏对E. coli O83的FICI为0.50。结果提示，乌里史古—达兰—哈力苏、协日—洪连、呼仍—图如、乌拉勒吉嘎纳、阿纳尔对3种血清型大肠杆菌的综合抑菌效果较好；舒布格日—希木勒德格与呼仍—图如在抑制E. coli O26时表现为协同作用，组方时可优先考虑；乌拉勒吉嘎纳与乌里史古—达兰—哈力苏在抑制E. coli O83时表现为协同作用，组方中可优先考虑。 相似文献
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采用管碟法、微量稀释法和琼脂平板计数法,测定抑菌圈直径、最低抑菌浓度(MIC)和最低杀菌浓度(MBC),分析临床分离的大肠杆菌菌株的耐药性,并观察苗药白接骨醇提物对标准大肠杆菌菌株和临床分离的具有耐药性的猪源大肠杆菌菌株的抑菌效果。结果显示,临床分离的大肠杆菌菌株对甲氧苄啶/磺胺甲恶唑、头孢曲松、环丙沙星均无抑菌圈产生,表现多重耐药。而白接骨醇提物对两株细菌的抑菌圈直径分别达到33.20±0.82 mm和33.78±0.38 mm;MIC均为0.78 mg/m L;MBC均为1.56 mg/m L。苗药白接骨醇提物对具有耐药性的猪源大肠杆菌在体外有较好的抑菌效果。 相似文献
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This research was aimed to investigate the effect of rosemarinic acid combined with antibacterial agents against bacterial carrying gene fosA3 in vitro.Resistance gene types were determined by identification of bacteria isolated in clinics.Antibacterial activity and fungicidal activity of rosemarinic acid were tested by oxford cup method and spread-plate method.The minimal inhibiton concertration (MIC) of rosemarinic acid and antibacterial agents were tested through twice micro-dilution method,fractional inhibitory concentration index (FICI) of rosemarinic acid combined with antibacterial agents were determined by microdilution checkerboard techniques.Escheriohia coli carrying multidrug resistance gene fosA3 was isolated.The MIC of rosemarinic acid was 640 μg/mL,when application of rosemarinic acid combined with ciprofloxacin,levofloxacin,coly-mycin,gatifloxacin,amikacin,ceftazidime,ceftiofur sodium,FICI≤0.5,showed an additive effect;With ceftriaxone sodium,norfloxacin,mequindox,0.5fosA3 Escheriohia coli.Antibacterial activities of antibacterial agents against the fosfomycin resistance gene fosA3 Escherichia coli were enhanced significantly by rosemarinic acid. 相似文献
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试验旨在探讨迷迭香酸与抗菌药联合体外抗含fosA3耐药基因大肠杆菌的效果。本试验对临床分离的细菌进行鉴定,确定细菌所含耐药基因种类,用牛津杯法测定迷迭香酸的抑菌活性,平板涂布法测定迷迭香酸的杀菌活性,采用96孔反应板二倍微量稀释法分别检测迷迭香酸与抗菌药的最小抑菌浓度(MIC),再用微量棋盘稀释法测定迷迭香酸与抗菌药联合作用后的分级抑菌浓度指数(FICI)。结果显示,分离到含fosA3耐药基因大肠杆菌;迷迭香酸的MIC为640 μg/mL,迷迭香酸与环丙沙星、左旋氧氟沙星、黏杆菌素、加替沙星、阿米卡星、头孢他啶、头孢噻呋钠联合应用后其FICI≤0.5,有协同作用;与头孢曲松钠、诺氟沙星、痢菌净联合应用后0.5fosA3基因大肠杆菌有一定的抑菌活性和杀菌活性,其与部分抗菌药联合应用后,抗菌药体外抗菌活性显著增强。 相似文献
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本试验旨在检测2株枯草芽孢杆菌对致病性大肠杆菌和沙门氏菌抑菌作用。以致病性大肠杆菌和沙门氏菌作为指示菌,采用2株枯草芽孢杆菌与大肠杆菌和沙门氏菌同时接种及先后接种的方法,对其与大肠杆菌和沙门氏菌的生物颉颃作用进行了研究。结果表明,先接种枯草芽孢杆菌再接种致病菌抑制作用最明显且在24 h时抑菌作用最强,同时接种枯草芽孢杆菌和致病菌抑制作用次之,先接种致病菌再接种枯草芽孢杆菌的抑制作用最弱。提示,2株枯草芽孢杆菌对致病性大肠杆菌和沙门氏菌都有一定的抑制作用,但抑制作用的强弱有差异,且与枯草芽孢杆菌和致病菌接种的时间长短有关。 相似文献
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WANG Ling GUO Zhi-ting YANG Feng WANG Wen-li MO Ya-xia GUO Ai-ming LUO Xiao-qin WEI Xiao-juan LV Ya-nan 《中国畜牧兽医》2017,44(2):594-600
The purpose of this study was to indicate the antibacterial effect of traditional Chinese medicine Radix dichroa powder (RDP) in vitro. Minimal inhibitory concentration (MIC) of RDP for 12 pathogens were determined by two fold dilution method and agar dilution method, and the dose-effect relationship of antibiotic effect was studied, and the antimicrobial effect was also observed by Oxford-cup method. The results from two fold dilution method indicated that RDP had stronger inhibited effect to Streptococcus and Bacillus subtilis (MIC were from 15.6 to 62.5 mg/mL) than that of S. aureus (MIC was about 250 mg/mL), Enterobacteria (MIC was about 500 mg/mL) and fungi (MIC > 500 mg/mL); The results of agar dilution method showed that RDP had some antibacterial activities on Proteusbacillus vulgaris, Candida albicans And aspergillus niger, MIC was about 500 mg/mL, while it had weak antibacterial effect on other pathogens (MIC > 500 mg/mL). The results of Oxford-cup method showed that RDP (500 mg/mL) had some degree antimicrobial effect on pathogens, and the bacteria-inhibiting ring diameter of RDP not exceeded 10 mm, while drug-action ring was observed obviously around the Oxford-cup, and the number of bacteria was significantly decreased within the ring. In conclusion, RDP had some degree antibacterial effect on common pathogens, but the effects were not strong because of charicteristics of RDP itself and lower effective content. 相似文献
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试验旨在研究中药常山散的体外抑菌活性。分别采用试管二倍稀释法联合琼脂平板稀释法及营养琼脂稀释法对选用的12种致病菌进行抑菌试验,测定最低抑菌浓度（MIC）,进行抗菌作用量效关系研究,并通过牛津杯法观察药物抑菌效果。试管二倍稀释法联合琼脂平板法结果表明,常山散对链球菌属和芽孢杆菌的抑菌效果较强,MIC在15.6~62.5 mg/mL之间;对金黄色葡萄球菌和肠杆菌有较弱的抑菌作用,MIC在250~500 mg/mL之间;对真菌的抑菌作用最弱,MIC值 > 500 mg/mL,其抑菌强度大小依次为：链球菌属、芽孢杆菌、肠杆菌、真菌。营养琼脂稀释法结果表明,常山散对变形杆菌、白色念珠菌及黑曲霉具有一定的抑菌作用,MIC约为500 mg/mL,而对其他链球菌属、肠杆菌属及芽孢杆菌属细菌的抑菌效果较弱,MIC值均 > 500 mg/mL。牛津杯法抑菌活性研究结果显示,常山散药液（500 mg/mL）对12种菌均有一定的抑菌效果,但抑菌效果较弱,绝大多数抑菌环直径≤10 mm。牛津杯周围可见明显的药物作用圈,作用圈内细菌数量较其他部位明显减少。综合以上试验结果,中药常山散对常见致病菌均具有一定抑菌效果,但由于药物本身的特性及有效组分含量较低,其抑菌作用效果较弱。 相似文献
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This paper researched antibacterial effect of different Bidens bipinnata L extracts against clinical ESBLs E.coli by means of micro-dilution assay and the present method of combining traditional Chinese herbs with western medicine in vitro. The results showed that it had good inhibitory effect under Bidens bipinnata L decoction, ethyl acetate extracts, acetone extracts and trichloromethane extracts in combination with antibiotic. And ethyl acetate extracts was the most efficient. Bidens bipinnata L decoction was the most widespread, and could reduce the MIC of different antibiotics. 相似文献
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[Objective] The paper was to isolate and identify probiotics in the intestine of laying hens. [Method] The intestinal probiotics in laying hens at peak period were isolated using conventional separation methods; the physical and chemical properties of target strains and in vitro antibacterial effects were measured. Moreover, the safety test of chicks was conducted. [Result] Four strains of lactobacillus were isolated from the jejunum of laying hens, including Lactobacillus plantarum, Bacillus acidophilus, L. delbrueckii subsp. Delbrueckii and L. delbrueckii subsp. Lactis, and their inhibition zone diameters were 18.30, 16.07, 11.45, 17.26 mm, respectively. One strain of Lactobacillus, L. brevis, was isolated from the cecum, with the inhibition zone diameter of 10.26 mm. Three strains of bacillus were isolated from the cecum, including Bacillus subtilis, B. cereus and B. licheniformis, and their inhibition zone diameters were 9.25, 8.46 and 8.37 mm, respectively. Daily drinking 2 billion units of viable bacteria was the safe dosage for chicks. [Conclusion] Eight strains of probiotics had certain inhibitory effect on Escherichia coli O_2, and had no toxic side effects to chicks. Lactobacillus had strong antibacterial effect on E. coli O_2, while the antibacterial effect of bacillus was relatively weak. 相似文献