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《动物医学进展》2021,42(7)
旨在比较3种DNA提取方法对山羊乳中致乳房炎主要病原菌DNA的提取效果及对PCR检测的影响。将不同浓度的金黄色葡萄球菌、无乳链球菌和大肠埃希氏菌加入羊乳中,并分别用硅胶膜试剂盒、酚/氯仿法和CTAB/NaCl法等3种方法提取总DNA,比较所获得DNA的浓度、纯度、所需时间和经济成本及对各病原特异性PCR检测的影响。结果显示,各方法均能成功地提取羊乳中致乳房炎的3种病原菌DNA;硅胶膜试剂盒和CTAB/NaCl法提取山羊乳中金黄色葡萄球菌和无乳链球菌DNA的效果相同且明显优于酚/氯仿法;3种方法提取山羊乳中大肠埃希氏菌的效果相同。CTAB/NaCl法具有提取效果好、耗时较短、成本低和方便的优点,是从羊乳中提取病原DNA的良好方法。研究结果为临床上山羊乳房炎病原菌的分子检测和流行病学调查提供了方法学上的参考。 相似文献
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禽类血液中的蛋白质含量较高,用传统方法提取其血液中的基因组DNA比较繁琐、纯度不高,而且提取的产物中有大量蛋白质残留。本研究采用改良的CTAB法从白羽王鸽全血中提取全基因组DNA,并以传统的酚-氯仿抽提的方法和TAKARA公司基因组提取试剂盒法作对照。结果表明：qCTAB法可以得到大量的、较完整的基因组DNA,并且纯度达到2．00,浓度达到了144．67ng/μL,完全可以满足PCR扩增限制酶切等实验的要求。 相似文献
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为确定一种稳定高效的鸡血液DNA提取方法,满足基因组检测对DNA的要求,研究应用磁珠法、酚-氯仿法和试剂盒法。分别对抗凝血和凝血状态的鸡血液样品进行基因组DNA提取,通过超分光光度计和1%琼脂糖凝胶电泳评价所获得的DNA质量,并对三种提取方法所需成本进行估算和比较。结果显示：三种方法均能从两种不同状态血液样本中提取出基因组DNA,酚-氯仿法最为经济,但耗时长且需要使用危险化学品,磁珠法与试剂盒法具有耗时短和环保的优点,且磁珠法较试剂盒法更经济。研究表明磁珠法使用的试剂量少、操作简单、耗时短、日提取样本数目远大于其他两种方法,是三种方法中最为快捷的方法,可以满足实际生产中大批量鸡血液基因组DNA提取的要求。 相似文献
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本试验比较了从山羊粪便中提取总DNA的四种方法的优缺点,旨在为后续实验提供合适的提取方法。笔者首先采用PBS缓冲液过夜处理粪便标本,继而通过酚-氯仿抽提法、CTAB抽提法、天根试剂盒法和OMEGA试剂盒法提取样品总DNA。结果显示：酚-氯仿抽提法提取的DNA完整性不好,且纯度低;CTAB法提取的DNA浓度和纯度都较高,但完整性不好;试剂盒法提取方便,操作简单,时间短,但提取的浓度较低,其中天根试剂盒法提取的DNA纯度高,完整性好。综合考虑,天根试剂盒法是提取山羊粪便总DNA的最佳方法。 相似文献
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《中国牛业科学》2016,(2)
[目的]通过比较三种提取水牛全血基因组DNA的方法,获得一种安全、高效、快速的DNA提取方法,为水牛基因功能的研究奠定基础。[方法]收集43头水牛抗凝血样,每份血样随机分为等量3份,每份血样2mL,分别使用试剂盒改良法、试剂盒说明书法及酚仿抽提法提取全血基因组DNA。比较分析三种方法提取的同一头牛三份血样DNA的含量、OD260/280值、琼脂糖凝胶电泳和基因扩增结果。[结果]三种方法提取DNA的含量由高到低依次为试剂盒改良法、酚仿抽提法、试剂盒说明书法,各组间差异显著(1376.72±127.54VS 1121.32±81.64VS 326.18±21.17,P0.05)。三种方法提取DNA的OD-260/280值依次增加,试剂盒改良法与试剂盒说明书法OD260/280值差异不显著(1.85±0.0017 VS1.86±0.0021,P0.05),与酚仿抽提法OD260/280值有显著差异(1.85±0.0017VS 1.88±0.0029,1.86±0.0021VS 1.88±0.0029,P0.05)。三种方法提取DNA琼脂糖凝胶电泳结果显示,试剂盒改良法和试剂盒说明书法DNA条带清晰、光密度高,酚仿抽提法条带模糊有拖带现象。三种方法所提取的基因组PCR扩增stat5基因获得较清晰准确的条带,扩增效果良好。[结论]试剂盒改良法用于水牛全血基因组的提取比试剂盒说明书法和酚氯仿法更安全、高效、便捷。 相似文献
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本试验采集蒙古马新鲜粪便样品,采用酚－氯仿抽提法和2种细菌基因组DNA提取试剂盒法进行样品中细菌基因组DNA的提取。通过DNA浓度和纯度的测定,并将其作为模板扩增细菌16S rDNA V3区特异性片段对提取效果进行比较,从而找出更适合蒙古马粪便中细菌基因组DNA的提取方法。结果显示,3种提取方法得到的基因组DNA均能用于PCR扩增的模板,其中B试剂盒法提取的DNA数量较多,且纯度高,更适合用于提取蒙古马肠道微生物细菌基因组DNA及后续的蒙古马肠道微生物多样性等分子生物学试验。 相似文献
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为筛选一种高效、快捷的血液基因组DNA提取试剂盒,采集24份新鲜西藏绵羊血液样本,选用6种市售商业化试剂盒（LifeFeng柱式试剂盒DK601和非柱式试剂盒DK602,康为世纪非柱式试剂盒CW0544和柱式试剂盒CW0546,上海生工非柱式试剂盒SK8224和柱式试剂盒SK8254）,比较所提DNA的浓度、纯度、得率以及对嗜吞噬细胞无形体16S rRNA进行巢式PCR扩增,综合评价不同试剂盒DNA提取效果.结果表明,应用LifeFeng柱式试剂盒DK601提取的DNA浓度和纯度均最高,得率较高,分别达到75.63 ng/μL、1.894（OD260/OD280）、18.91 ng/μL;且嗜吞噬细胞无形体16S rRNA基因的PCR扩增条带清晰度最优.因此,LifeFeng DK601可作为提取绵羊血液基因组DNA及嗜吞噬细胞无形体（Anaplasma phagocytophilum）病原鉴定的首选试剂盒. 相似文献
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Halos L Jamal T Vial L Maillard R Suau A Le Menach A Boulouis HJ Vayssier-Taussat M 《Veterinary research》2004,35(6):709-713
Molecular detection of pathogenic microorganisms in ticks is based on DNA amplification of the target pathogen; therefore, extraction of DNA from the tick is a major step. In this study, we compared three different tick DNA extraction protocols based on an enzymatic digestion by proteinase K followed by DNA extraction by a commercial kit (method 1), or on mortar crushing, proteinase K digestion and phenol/chloroform DNA extraction (method 2) and fine crushing with a beads beater, proteinase K digestion and DNA extraction using a commercial kit (method 3). The absence of PCR inhibitors and the DNA quality were evaluated by PCR amplification of the tick mitochondrial 16S rRNA gene using tick-specific primers. With method 1, 23/30 (77%) of the samples were extracted; with method 2, 30/31 (97%) of the samples were extracted and with method 3, 30/30 (100%) of the samples were extracted. DNA extraction efficiency using method 3 is significantly higher than DNA extraction efficiency using method 1 (100% versus 77%, P < 0.05). There was no significant difference between methods 2 and 3. Method 3 was however more adapted to cohort studies than method 2. This technique was validated for cohort tick DNA extraction and applicable to the treatment of small samples such as nymphs and soft ticks with 100% efficiency. 相似文献
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S. Merk H. Meyer I. Greiser‐Wilke L. D. Sprague H. Neubauer 《Zoonoses and public health》2006,53(6):281-285
Bacterial DNA (Burkholderia cepacia) was prepared from artificially infected equine ethylenediaminetetraacetic acid (EDTA)‐blood and lung tissue by using four standard methods (lysis buffer containing proteinase K, phenol/chloroform/isoamylalcohol‐extraction, microwave‐treatment, heat treatment) and six commercially available kits (Puregene®, High Pure PCR Template Preparation Kit®, InstaGene®, QiaAmp Tissue Kit®, DNAzol® and Elu‐Quik®). After a subsequent polymerase chain reaction (PCR), their efficacy and sensitivity were compared. Concerning the detection limits, the simple lysis with a proteinase K‐containing buffer led to the best results for EDTA‐blood as well as for artificially infected lung tissue. 相似文献
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Bovine foetal sex determination—Different DNA extraction and amplification approaches for efficient livestock production 
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下载免费PDF全文 M Ristanic Lj Stanisic M Maletic U Glavinic V Draskovic N Aleksic Z Stanimirovic 《Reproduction in domestic animals》2018,53(4):947-954
Foetal sex determination using polymerase chain reaction (PCR) in mammals is based on the amplification of gender‐specific foetal DNA sequences circulating in maternal blood. The bovine synepitheliochorial placenta does not allow a direct contact between the trophoblast and the maternal blood, resulting in difficult passage of foetal DNA and, consequently, its very small amounts in maternal bloodstream. Circulating cell‐free foetal DNA (ccffDNA) encompasses short nucleotide fragments (300–600 bp) in maternal circulation. The aim of this study was to assess this non‐invasive method in accurate prenatal sexing in early and late gestational periods in comparison with ultrasound diagnostics. As various DNA isolation and amplification methods were tested, their success in obtaining reliable results was evaluated. Two groups were tested, each consisting of 20 pregnant cows. Blood of a bull and a non‐pregnant heifer was the controls. Extraction of foetal DNA was accomplished by three different methods: using tubes with silicone membranes, a single‐tube extraction without silicone membranes and phenol–chloroform extraction. Following each extraction method, foetal DNA was amplified using PCR and real‐time PCR with both bAML and TSPY primers in a separate reaction. Positive results were obtained only after amplification of foetal DNA extracted with a single‐tube extraction kit. In comparison with ultrasound examination results and foetal gender recorded at birth, the sensitivity of the PCR test was 90% in Group I, but the technique failed to detect male foetuses in Group II. The real‐time PCR test sensitivity in Group I was 90% and in Group II 91.6%. 相似文献
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A multiplex PCR assay for differentiating strongyle eggs from cattle has recently been described; however, the egg disruption and DNA extraction procedures, though effective, are inadequate for large studies or clinical application. The purpose of this research was to evaluate methods for disrupting trichostrongyle eggs, then assess commercial kits for extracting egg DNA using Ostertagia ostertagi as a model species. Egg disruption procedures tested included probe sonication, bath sonication, bead beating, boiling, microwaving, proteinase K/SDS digestion, freezing, and various combinations of the above with the incorporation of sodium dodecyl sulfate. These procedures were evaluated in conjunction with four commercial DNA extraction kits: DNA Stool mini kit and DNeasy Plant kit (Qiagen), Fast DNA kit (QBiogene), and the MAP extraction kit (Tetracore). Results showed that egg disruption was best accomplished with the bead beater and ceramic beads, resulting in 100% disruption within 1min. When DNA extraction was preceded by the isolation of eggs from feces, all procedures except the Fast DNA kit produced PCR-ready DNA from at least two eggs. The DNeasy Plant kit allowed consistent detection of DNA released from one egg. Due to the morphological similarities among trichostrongyle eggs in ruminants, strongyle eggs in equids, and hookworm eggs, the methods described herein may have broad application to other nematodes. 相似文献
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Mathieu Pruvot Ketsarin Kamyingkird Marc Desquesnes Nachai Sarataphan Sathaporn Jittapalapong 《Veterinary parasitology》2013,191(3-4):203-208
Trypanosoma evansi is responsible for the most largely distributed animal trypanosomosis, affecting a wide range of wild and domestic animals. Its surveillance requires the implementation of standardized and reliable diagnostic tools. Although the development of polymerase chain reaction (PCR) tools has greatly improved our diagnostic capacity, factors affecting their sensitivity need to be acknowledged and accounted for in the interpretation of results. The targeted gene and the primer design have already been shown to greatly affect the sensitivity of a PCR, and the best-performing sets of primers have been previously identified. However, the sensitivity of the PCR is also largely influenced by the DNA extraction or sample preparation method. In this paper, we selected 6 DNA extraction or blood sample preparation methods representative of what would be used in a budget-constrained setting: phenol–chloroform, Chelex®, Flexigen (Qiagen®) kit, Genekam® kit and two original protocols using sodium hydroxide. We studied the effects of the preparation method on the detection limit of the subsequent PCR. Our results show that the extraction method strongly affects the PCR sensitivity. The classical phenol–chloroform extraction method allowed for the PCR with the lowest detection limit. Some combinations of extraction method and primer set had detection limits that were not compatible with their use as a reliable diagnostic test, and would severely reduce the performance of a surveillance program. Therefore, we encourage laboratories to carefully select their sample preparation and PCR protocols, depending on the aimed sensitivity, cost, safety, time requirement and objectives. 相似文献
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The aim of the present study is to identify ostrich sex by using polymerase chain reaction (PCR) on micro amounts of DNA from blood, bloodstain and feathers. Sixteen male and 18 female ostriches were used as test individuals. Genomic DNA as a template was extracted by the Chelex method. Ostrsex‐P1 and P2 primers were designed to perform PCR amplification on the template. PCR products were checked using agarose gel electrophoresis with ethidium bromide staining and ostrich sex was determined directly by the bands shown on the gel. The results demonstrate that ostrich sex can be determined by the extraction of DNA from as little as 0.0125 μl blood using Chelex, whereby the use of large amounts of organic solvents such as phenol and chloroform are unnecessary. In addition, it is possible to identify ostrich sex using micro amounts of DNA extracted from bloodstains and/or feathers. The use of feathers particularly avoids unwanted sampling problems such as the difficulty of collecting ostrich blood, the stress to the ostrich caused by bleeding, and the demand for a lot of manpower for ostrich restraint. 相似文献
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通过用4种方法对羊布鲁菌的检测,确立适用于基层应用的羊布鲁菌快速检测技术。http://www.mdxycn.com/采用浊度仪LAMP、金属浴LAMP、荧光目视检测试剂盒LAMP和普通PCR共4种方法对羊血液中的布鲁菌进行检测,比较其检测结果。结果表明,共检测162份羊血液,布鲁菌检出率分别为浊度仪LAMP为8.6%、金属浴LAMP为8.6%、荧光目视检测试剂盒为8.6%、普通PCR为6.2%。LAMP较普通PCR方法特异性强且灵敏度高;金属浴LAMP方法操作简便,无需特殊设备,更适用于基层应用。 相似文献