Detection

检测
  • 文章类型: Journal Article
    分子成像模式显示了有价值的非侵入性技术,能够精确和选择性地解决与前列腺癌(PCa)相关的分子标志物。这篇系统综述概述了正电子发射断层扫描(PET)方法中使用的成像标记,特别关注PCa涉及的途径和介体。本系统综述旨在评估和分析有关分子成像技术检测PCa的诊断准确性的现有文献。PubMed,EBSCO,ScienceDirect,搜索了WebofScience数据库,确定了32项报道检测PCa的分子成像模式的研究。许多成像模式和放射性示踪剂被用来检测PCa,包括68Ga-前列腺特异性膜抗原(PSMA)PET/计算机断层扫描(CT),68Ga-PSMA-11PET/磁共振成像(MRI),18F-PSMA-1007PET/CT,18F-DCFPyLPET/MRI,18F-胆碱PET/MRI,和18F-氟乙基胆碱PET/MRI。在11项研究中,放射性标记的68Ga-PSMAPET/CT成像的合并灵敏度为80(95%置信区间[CI]:35-93),特异性为90(95%CI:71-98),准确度为86(95%CI:64-96)。PSMA-配体68Ga-PET/CT显示出良好的诊断性能,对于检测和分期PCa似乎很有希望。
    Molecular imaging modalities show valuable non-invasive techniques capable of precisely and selectively addressing molecular markers associated with prostate cancer (PCa). This systematic review provides an overview of imaging markers utilized in positron emission tomography (PET) methods, specifically focusing on the pathways and mediators involved in PCa. This systematic review aims to evaluate and analyse existing literature on the diagnostic accuracy of molecular imaging techniques for detecting PCa. The PubMed, EBSCO, ScienceDirect, and Web of Science databases were searched, identifying 32 studies that reported molecular imaging modalities for detecting PCa. Numerous imaging modalities and radiotracers were used to detect PCa, including 68Ga-prostate-specific membrane antigen (PSMA) PET/computed tomography (CT), 68Ga-PSMA-11 PET/magnetic resonance imaging (MRI), 18F-PSMA-1007 PET/CT, 18F-DCFPyL PET/MRI, 18F-choline PET/MRI, and 18F-fluoroethylcholine PET/MRI. Across 11 studies, radiolabelled 68Ga-PSMA PET/CT imaging had a pooled sensitivity of 80 (95% confidence interval [CI]: 35-93), specificity of 90 (95% CI: 71-98), and accuracy of 86 (95% CI: 64-96). The PSMA-ligand 68Ga-PET/CT showed good diagnostic performance and appears promising for detecting and staging PCa.
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  • 文章类型: Journal Article
    生产系统的数字化彻底改变了工业监控。分析自下而上的实时数据可以实现对工业过程的动态监控。收集各种类型的数据,像视频帧和时间信号。本文重点介绍利用视觉系统中的图像来监视计算机数控(CNC)车床上的制造过程。我们提出了一种在生产线边缘设计和集成这些视频模块的方法。这种方法检测原始零件的存在,测量过程参数,评估工具状态,并使用图像处理技术实时检查粗糙度。通过检查部署来评估效率,准确性,响应能力,和限制。最后,提供了一种观点,可以在更复杂的人工智能(AI)方法中使用边缘的元数据进行预测性维护。
    The digitization of production systems has revolutionized industrial monitoring. Analyzing real-time bottom-up data enables the dynamic monitoring of industrial processes. Data are collected in various types, like video frames and time signals. This article focuses on leveraging images from a vision system to monitor the manufacturing process on a computer numerical control (CNC) lathe machine. We propose a method for designing and integrating these video modules on the edge of a production line. This approach detects the presence of raw parts, measures process parameters, assesses tool status, and checks roughness in real time using image processing techniques. The efficiency is evaluated by checking the deployment, the accuracy, the responsiveness, and the limitations. Finally, a perspective is offered to use the metadata off the edge in a more complex artificial-intelligence (AI) method for predictive maintenance.
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  • 文章类型: Journal Article
    多环芳烃(PAHs)是一类持久性有机污染物,由于其公认的人类致癌特性,在食品安全领域引起了全球关注。食物会被水中的PAHs污染,空气,或土壤,或在食品加工和烹饪过程中。PAHs来源广泛多样,导致其对食品的持续污染,导致它们在这些产品中的积累。因此,监测食品中多环芳烃的含量对保障食品的安全和公众健康是必要的。这篇综述论文试图让读者概述PAHs对作物的影响,它们的发生和来源,以及用于样品制备和检测食品中多环芳烃的方法。此外,提出了未来研究的可能方向。目的是为监测工作提供参考,预防,并对食品中的多环芳烃进行了深入的探索。
    Polycyclic aromatic hydrocarbons (PAHs) represent a category of persistent organic pollutants that pose a global concern in the realm of food safety due to their recognized carcinogenic properties in humans. Food can be contaminated with PAHs that are present in water, air, or soil, or during food processing and cooking. The wide and varied sources of PAHs contribute to their persistent contamination of food, leading to their accumulation within these products. As a result, monitoring of the levels of PAHs in food is necessary to guarantee the safety of food products as well as the public health. This review paper attempts to give its readers an overview of the impact of PAHs on crops, their occurrence and sources, and the methodologies employed for the sample preparation and detection of PAHs in food. In addition, possible directions for future research are proposed. The objective is to provide references for the monitoring, prevention, and in-depth exploration of PAHs in food.
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  • 文章类型: Journal Article
    细胞外囊泡(EV)被纳米级磷脂双层膜包围,并且通常在30至200nm的尺寸范围内。它们含有高浓度的特定蛋白质,核酸,和脂质,反映但不等同于亲本细胞的组成。电动汽车的固有特性和多样性使其在癌症识别和治疗领域具有广泛而独特的优势。最近,EV已被认为是检测癌症的潜在肿瘤标志物。适体,它们是单链DNA或RNA的分子,通过采用不同的三级结构,对它们的靶标表现出显著的特异性和亲和力。适体提供了多种优势比他们的蛋白质对应物,如降低免疫原性,方便大规模合成的能力,和直接的化学修饰。在这次审查中,我们总结了电动汽车的生物发生,样本采集,隔离,存储和表征,最后对基于适体的电动汽车检测分析技术进行了全面综述。
    Extracellular vesicles (EVs) are enclosed by a nanoscale phospholipid bilayer membrane and typically range in size from 30 to 200 nm. They contain a high concentration of specific proteins, nucleic acids, and lipids, reflecting but not identical to the composition of the parent cell. The inherent characteristics and variety of EVs give them extensive and unique advantages in the field of cancer identification and treatment. Recently, EVs have been recognized as potential tumor markers for the detection of cancer. Aptamers, which are molecules of single-stranded DNA or RNA, demonstrate remarkable specificity and affinity for their targets by adopting distinct tertiary structures. Aptamers offer various advantages over their protein counterparts, such as reduced immunogenicity, the ability for convenient large-scale synthesis, and straightforward chemical modification. In this review, we summarized EVs biogenesis, sample collection, isolation, storage and characterization, and finally provided a comprehensive survey of analysis techniques for EVs detection that are based on aptamers.
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  • 文章类型: Journal Article
    全球有5.37亿人患有糖尿病,与许多主要健康风险有关的葡萄糖管理问题,包括心血管疾病.有一个新的需要,糖尿病药物的有效配方,以解决这种情况及其相关的后果,因为现有的治疗有许多缺点和限制。这鼓励了治疗计划的制定,以绕过其中的一些限制,比如治疗药物的生物利用度低或患者对现有疗法的不服从。基于纳米技术的方法有很多希望加强糖尿病患者的治疗。为了控制血糖,这篇综述文章强调了最近的发展,并探讨了不同材料(聚合物,陶瓷,树枝状聚合物,等。)作为纳米载体,用于输送胰岛素和其他抗糖尿病药物。使用由负载有胰岛素和葡萄糖特异性酶的带相反电荷的葡聚糖纳米颗粒的静电相互作用产生的可注射和酸降解的聚合物网络,我们回顾了一种用于自我调节的胰岛素释放的葡萄糖介导的释放方法,其中,在将可降解的纳米网络皮下注射到1型糖尿病小鼠体内后,在体内实验中证实,这些制剂改善了葡萄糖管理。此外,关于二氧化硅基纳米载体的讨论,他们治疗糖尿病和控制血糖水平的潜力,并解释了树枝状聚合物在糖尿病治疗中的作用。这是通过利用二氧化硅纳米粒子的性质来完成的,例如它们的可调颗粒和孔径,表面化学,和生物相容性。本文综述了纳米材料的意义及其在糖尿病诊断和治疗中的应用,阐明该领域的潜力,并概述其未来的前景。
    537 million people worldwide suffer from diabetes mellitus, a problem of glucose management that is related to a number of major health risks, including cardiovascular diseases. There is a need for new, efficient formulations of diabetic medications to address this condition and its related consequences because existing treatments have a number of drawbacks and limits. This encouraged the development of treatment plans to get around some of these restrictions, like low therapeutic drug bioavailability or patients\' disobedience to existing therapies. Approaches based on nanotechnology have a lot of promise to enhance the treatment of diabetic patients. In order to manage blood glucose, this review article highlights recent developments and explores the potential applications of different materials (polymeric, ceramic, dendrimers, etc.) as nanocarriers for the delivery of insulin and other antidiabetic medications. Using an injectable and acid-degradable polymeric network produced by the electrostatic interaction of oppositely charged dextran nanoparticles loaded with insulin and glucose-specific enzymes, we reviewed a glucose-mediated release approach for the self-regulated delivery of insulin, in which, after a degradable nano-network was subcutaneously injected into type 1 diabetic mice,in vivoexperiments confirmed that these formulations improved glucose management. In addition, a discussion of silica-based nanocarriers, their potential for treating diabetes and controlling blood glucose levels, and an explanation of the role of dendrimers in diabetes treatment have been covered. This is done by utilizing the properties of silica nanoparticles, such as their tuneable particle and pore size, surface chemistry, and biocompatibility. The article summarized the significance of nanomaterials and their uses in the diagnosis and treatment of diabetes overall, illuminating the field\'s potential and outlining its prospects for the future.
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  • 文章类型: Journal Article
    肺癌是全球第二常见的癌症,也是导致癌症死亡的主要原因。低剂量计算机断层扫描(LDCT)是推荐的早期发现肺癌的影像学筛查工具。一种完全自动化的LDCT计算机辅助检测方法将极大地改善现有的临床工作流程。大多数现有的肺部检测方法都是为高剂量CT(HDCT)设计的,由于域移位和LDCT图像质量差,这些方法不能直接应用于LDCT。在这项工作中,我们描述了一种基于半自动化迁移学习的方法,用于使用LDCT早期检测肺结节.
    在这项工作中,我们开发了一种基于目标检测模型的算法,你只看一次(YOLO)来检测肺结节。YOLO模型首先是在CT上训练的,并且在使用医学到医学转移学习方法在LDCT上重新训练模型期间使用预训练权重作为初始权重。这项研究的数据集是来自一项筛选试验,该试验由从连续3年(T1,T2和T3)获得的50名活检证实的肺癌患者获得的LDCT组成。大约60名肺癌患者的HDCT来自一个公共数据集。使用包含15例患者病例(93个具有癌结节的切片)的固定测试集对开发的模型进行了评估,特异性,召回,和F1得分。评估指标每年按患者报告,并平均3年。为了进行比较分析,所提出的检测模型使用COCO数据集的预训练权重作为初始权重进行训练.采用α值为0.05的配对t检验和卡方检验进行统计学显著性检验。
    通过比较使用HDCT预训练权重与COCO预训练权重开发的拟议模型来报告结果。前一种方法与后一种方法在检测癌结节方面获得了0.982对0.93的精度,0.923与0.849的特异性在识别无癌结节的切片,召回率分别为0.87和0.886,F1评分为0.924和0.903。随着结节的进展,前一种方法的精密度为1,特异性为0.92,灵敏度为0.930.在对比研究中进行的统计分析导致精确度的p值为0.0054,特异性的p值为0.00034。
    在这项研究中,开发了一种半自动方法来检测LDCT中的肺结节,使用HDCT预训练权重作为初始权重并重新训练模型.Further,通过将上述方法中的HDCT预训练权重替换为COCO预训练权重来比较结果.所提出的方法可以在筛查程序中识别早期肺结节,减少由于LDCT误诊而导致的过度诊断和随访,在受影响的患者中开始治疗方案,降低死亡率。
    UNASSIGNED: Lung cancer is the second most common cancer and the leading cause of cancer death globally. Low dose computed tomography (LDCT) is the recommended imaging screening tool for the early detection of lung cancer. A fully automated computer-aided detection method for LDCT will greatly improve the existing clinical workflow. Most of the existing methods for lung detection are designed for high-dose CTs (HDCTs), and those methods cannot be directly applied to LDCTs due to domain shifts and inferior quality of LDCT images. In this work, we describe a semi-automated transfer learning-based approach for the early detection of lung nodules using LDCTs.
    UNASSIGNED: In this work, we developed an algorithm based on the object detection model, you only look once (YOLO) to detect lung nodules. The YOLO model was first trained on CTs, and the pre-trained weights were used as initial weights during the retraining of the model on LDCTs using a medical-to-medical transfer learning approach. The dataset for this study was from a screening trial consisting of LDCTs acquired from 50 biopsy-confirmed lung cancer patients obtained over 3 consecutive years (T1, T2, and T3). About 60 lung cancer patients\' HDCTs were obtained from a public dataset. The developed model was evaluated using a hold-out test set comprising 15 patient cases (93 slices with cancerous nodules) using precision, specificity, recall, and F1-score. The evaluation metrics were reported patient-wise on a per-year basis and averaged for 3 years. For comparative analysis, the proposed detection model was trained using pre-trained weights from the COCO dataset as the initial weights. A paired t-test and chi-squared test with an alpha value of 0.05 were used for statistical significance testing.
    UNASSIGNED: The results were reported by comparing the proposed model developed using HDCT pre-trained weights with COCO pre-trained weights. The former approach versus the latter approach obtained a precision of 0.982 versus 0.93 in detecting cancerous nodules, specificity of 0.923 versus 0.849 in identifying slices with no cancerous nodules, recall of 0.87 versus 0.886, and F1-score of 0.924 versus 0.903. As the nodule progressed, the former approach achieved a precision of 1, specificity of 0.92, and sensitivity of 0.930. The statistical analysis performed in the comparative study resulted in a p -value of 0.0054 for precision and a p -value of 0.00034 for specificity.
    UNASSIGNED: In this study, a semi-automated method was developed to detect lung nodules in LDCTs using HDCT pre-trained weights as the initial weights and retraining the model. Further, the results were compared by replacing HDCT pre-trained weights in the above approach with COCO pre-trained weights. The proposed method may identify early lung nodules during the screening program, reduce overdiagnosis and follow-ups due to misdiagnosis in LDCTs, start treatment options in the affected patients, and lower the mortality rate.
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  • 文章类型: Journal Article
    隐孢子虫感染在世界范围内的啮齿动物中很常见。在这项研究中,新疆某动物饲养场捕获野生褐鼠435只,中国,直接从每只大鼠的直肠内容物中获得粪便样本。分析了从这些粪便样品中提取的DNA的隐孢子虫。使用PCR靶向SSUrRNA基因。发现棕色大鼠中隐孢子虫感染的患病率为5.5%(435只中有24只)。有趣的是,不同动物围栏的感染率不同,鸡舍率为0%(0/51),牛棚(0/3),以及包括羊圈在内的其他地区的不同比率(6.1%,6/98),猪圈(7.6%,10/132),dovecote(7.0%,5/71),和户外环境(3.8%,3/80)。该研究确定了隐孢子虫的三种和一种基因型,即C.occultus(n=10),C.parvum(n=4),C.ditrichi(n=1),和隐孢子虫大鼠基因型IV(n=9)。此外,在gp60基因上,成功地将两个C.parvum分离株亚型为IIdA19G1(n=2)。这些结果为该地区棕色大鼠隐孢子虫的患病率和遗传多样性提供了有价值的见解。
    Cryptosporidium infection is a common occurrence in rodents worldwide. In this study, 435 wild brown rats were captured from an animal feedlot in Xinjiang, China, with a fecal sample obtained directly from the rectal contents of each rat. The DNA extracted from these fecal samples was analyzed for Cryptosporidium spp. using PCR targeting the SSU rRNA gene. The prevalence of Cryptosporidium infection in brown rats was found to be 5.5% (24 out of 435). Interestingly, the infection rates varied among different animal enclosures, with rates of 0% in the chicken coop (0/51), cowshed (0/3), and varying rates in other areas including the sheepfold (6.1%, 6/98), the pigsty (7.6%, 10/132), the dovecote (7.0%, 5/71), and outdoor environments (3.8%, 3/80). The study identified three species and one genotype of Cryptosporidium, namely C. occultus (n = 10), C. parvum (n = 4), C. ditrichi (n = 1), and Cryptosporidium rat genotype IV (n = 9). Additionally, two of the C. parvum isolates were successfully subtyped as IIdA19G1 (n = 2) at the gp60 gene. These results offer valuable insights into the prevalence and genetic diversity of Cryptosporidium in brown rats within the region.
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  • 文章类型: Journal Article
    隐私保护协同过滤的话题越来越受到关注。然而,隐私保护协同过滤技术容易受到先令或配置文件注入攻击。因此,为了获得完全成功,识别假冒配置文件至关重要。已经设计了各种技术来识别和防止侵入模式渗入系统。然而,这些策略是专门为不优先考虑隐私的协同过滤算法设计的。在优先考虑隐私的推荐系统中识别先令攻击的研究很少。这项工作提出了一种新颖的技术,用于识别隐私保护协作过滤系统中的先令攻击。我们采用蚁群聚类检测方法来有效地识别和消除由六种广泛认可的先令攻击对受损数据创建的虚假配置文件。该研究的目的是将欺诈性档案分类为特定的集群,并将该集群与系统分开。用实际数据进行了实证实验。实证结果表明,该研究得出的策略有效地消除了隐私保护协同过滤中的欺诈性个人资料。
    The topic of privacy-preserving collaborative filtering is gaining more and more attention. Nevertheless, privacy-preserving collaborative filtering techniques are vulnerable to shilling or profile injection assaults. Hence, it is crucial to identify counterfeit profiles in order to achieve total success. Various techniques have been devised to identify and prevent intrusion patterns from infiltrating the system. Nevertheless, these strategies are specifically designed for collaborative filtering algorithms that do not prioritize privacy. There is a scarcity of research on identifying shilling attacks in recommender systems that prioritize privacy. This work presents a novel technique for identifying shilling assaults in privacy-preserving collaborative filtering systems. We employ an ant colony clustering detection method to effectively identify and eliminate fake profiles that are created by six widely recognized shilling attacks on compromised data. The objective of the study is to categorize the fraudulent profiles into a specific cluster and separate this cluster from the system. Empirical experiments are conducted with actual data. The empirical findings demonstrate that the strategy derived from the study effectively eliminates fraudulent profiles in privacy-preserving collaborative filtering.
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  • 文章类型: Journal Article
    对479种无症状大豆(Glycinemax(L.)美林)从圣卡塔琳娜州(20个县)和南里奥格兰德州(41个县)的商业大豆田收集的种子样本,在2020/21年度(n=186),来自120个品种的2021/22(n=138)和2022/23(n=155)季节。种子由按农业部抽样标准采集的种子生产者提供,牲畜和粮食供应。从收到的每个样本中,随机挑选出200个无症状种子。通过浸入次氯酸钠溶液(1%)2分钟对种子进行表面消毒,并置于马铃薯葡萄糖琼脂(PDA)上。将板在23°C下以12小时的光周期孵育7天。DPC感染种子的平均患病率为73.7%。通过将菌丝体尖端转移至PDA并在25ºC下在12小时光周期中孵育14天来分离菌落。一个菌落(分离株MEMR0500)的形态特征与Lopez-Cardona(2021)中报道的形态特征相似。这种分离物具有絮凝剂,密集的菌落范围从浅灰色米色到棕色有绿色的区域和黑色球形的比尼迪亚(3到4比尼迪亚/平方厘米)。阿尔法分生孢子,5.1至7.0µmx1.5至2.8µm,30天后观察到透明,无盐和梭形(图S1)。没有观察到β-分生孢子。大豆品种BMXCromoIPRO,BMXZeusIPRO,BRS5804RR,使用牙签接种方法测试了FPS1867IPRO和NEO750IPRO的致病性(Siviero和Menten1995)。非定殖牙签用作阴性对照。将植物在25°C和90%相对湿度下孵育4天。在所有接种品种中均观察到1.0至2.5cmx0.5至0.9cm的灰褐色/红褐色病变,中心凹陷。重新分离真菌,菌落的特征与先前分离的那些相同。对于分子表征,使用CTAB方法(Doyle和Doyle1990)从菌丝体中提取DNA。使用GoTaq®FlexiDNA聚合酶(Promega,美国)和引物对,ITS-4F/ITS-5,T2/Bt2b和EF1-728F/EF1-986R用于扩增内部转录间隔区(ITS)(Costamilan等人。2008),β-微管蛋白(TUB2)(Glass和Donaldson1995),和翻译延伸因子1-α(TEF1)(Carbone和Kohn1999)基因,分别。对扩增的片段进行测序并提交到blast搜索(https://blast。ncbi.nlm.nih.gov/Blast.cgi)与GenBank中可用的序列。来自ITS的片段(登录号OR912979)与DiaportheueckeriUdayanga和Castl显示99.8%(549/582bp)的同一性。[as\'ueckerae\'][syn。D.奇迹R.G.Shivas,S.M.Thomps.&Y.P.Tan]分离FAU656(Ac。N、KJ590726)。TEF的序列(Ac。N.PP372869)与D.ueckeriFAU656(Ac。N.KJ590747),和TUB(AC。N.PP372870)与D.ueckeriFAU656(Ac.N、KJ610881)。在MEGAX中构建了具有每个基因的扩增序列和来自DPC的相应代表性序列的系统发育树(Kumar等人。2018)。MEMR0500分离株只与D.ueckeri进化枝聚集,确认真菌的身份(图S2)。在巴西,这是该病原体与大豆种子关联的第一份报告。在其他国家,这种病原体已被确定为茎溃疡的病原体(Mena等人。2020;洛佩兹-卡多纳等人。2021)。需要进一步的研究来分析这种种子相关病原体的风险。
    A survey of Diaporthe/Phomopsis Complex (DPC) species was carried out on 479 asymptomatic soybean (Glycine max (L.) Merrill) seed samples collected from commercial soybean fields in the states of Santa Catarina (20 counties) and Rio Grande do Sul (41 counties), in the 2020/21 (n=186), 2021/22 (n=138) and 2022/23 (n=155) seasons from 120 cultivars. The seeds were provided by seed producers who collected according to the sampling standard of the Ministry of Agriculture, Livestock and Food Supply. From each sample received, 200 symptomless seeds were randomly sorted out. The seeds were surface disinfected by immersion in a sodium hypochlorite solution (1%) for two minutes and placed on Potato Dextrose Agar (PDA). The plates were incubated for 7 days at 23°C with a photoperiod of 12-h. The average prevalence of 73.7% of DPC-infected seeds. Colonies were isolated by transferring mycelial tips to PDA and incubating for 14 days at 25ºC in a 12-h photoperiod. One colony (isolate MEMR0500) had morphological characteristics similar to those reported in Lopez-Cardona (2021). This isolate had a floccose, dense colony ranging from grayish beige to brown with greenish regions and black globose pycnidia (3 to 4 pycnidia/cm²). Alpha-conidia, 5.1 to 7.0 µm x 1.5 to 2.8 µm, were observed after 30 days and were hyaline, aseptate and fusiform (Figure S1). No beta-conidia were observed. Soybean plants of cultivars BMX Cromo IPRO, BMX Zeus IPRO, BRS 5804 RR, FPS 1867 IPRO and NEO 750 IPRO were tested for pathogenicity using the toothpick inoculation method (Siviero and Menten 1995). Non-colonized toothpicks served as a negative control. Plants were incubated for four days at 25°C and 90% relative humidity. Elongated 1.0 to 2.5 cm x 0.5 to 0.9 cm lesions gray-brown/reddish-brown with a depressed center were observed in all inoculated cultivars. The fungus was reisolated and the characteristics of the colonies were identical to those previously isolated. For molecular characterization, DNA was extracted from the mycelia using the CTAB method (Doyle and Doyle 1990). End-point PCR was performed using GoTaq® Flexi DNA Polymerase (Promega, USA) and primer pairs, ITS-4F/ITS-5, T2/Bt2b and EF1-728F/EF1-986R to amplify the internal transcribed spacer (ITS) (Costamilan et al. 2008), β-tubulin (TUB2) (Glass and Donaldson 1995), and translation elongation factor 1-α (TEF1) (Carbone and Kohn 1999) genes, respectively. The amplified fragments were sequenced and submitted to blast search (https://blast.ncbi.nlm.nih.gov/Blast.cgi) with the sequences available in GenBank. The fragment from ITS (accession number OR912979) showed 99.8% (549/582 bp) identity with Diaporthe ueckeri Udayanga & Castl. [as \'ueckerae\'] [syn. D. miriciae R.G. Shivas, S.M. Thomps. & Y.P. Tan] isolate FAU656 (Ac. N. KJ590726). The sequence of TEF (Ac. N. PP372869) showed 99.7% (339/355 bp) identity with D. ueckeri FAU656 (Ac. N. KJ590747), and of TUB (Ac. N. PP372870) showed 98.9% (436/536 bp) identity with D. ueckeri FAU656 (Ac. N. KJ610881). A phylogenetic tree with amplified sequences of each gene and the corresponding representative sequences from the DPC was constructed in MEGA X (Kumar et al. 2018). The MEMR0500 isolate was clustered only with the D. ueckeri clade, confirming the identity of the fungus (Figure S2). In Brazil, this is the first report of the association of this pathogen with soybean seeds. In other countries, this pathogen has been identified as the causal agent of stem canker (Mena et al. 2020; Lopez-Cardona et al. 2021). Further research is needed to analyze the risk of this seed-associated pathogen.
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  • 文章类型: Journal Article
    背景:SARS-COV-2有越来越多的疾病趋势,因此需要一种快速且负担得起的诊断方法。与其他方法相比,它应该高度准确并节省成本。本研究的目的是实现这些目标。
    方法:本研究使用TaqMan一步RT-qPCR和快速一步RT-LAMP(逆转录酶环介导的等温扩增)分析了342个样品。进行一步LAMP测定以评估灵敏度和特异性。
    结果:研究报告了使用两种不同方法的阳性样本。在RT-LAMP方法中,唾液有92个阳性样本(26.9%)和250个阴性样本(73.09%),鼻咽有94个阳性样本(27.4%)和248个阴性样本(72.51%)。在RT-qPCR方法中,唾液有86个阳性样本(25.1%)和256个阴性样本(74.8%),鼻咽有93个阳性样本(27.1%)和249个阴性样本(72.8%).唾液和鼻咽样本中的两项测试的一致性分别为93%和94%,基于科恩的卡帕系数(κ)(P<0.001)。在1×101的稀释度和100%的特异性下报告了该技术的灵敏度。
    结论:基于研究结果,一步LAMP测定法具有多种优点。这些包括简单性,成本效益,高灵敏度,和特异性。一步LAMP测定法显示出作为诊断工具的希望。它可以帮助管理疾病爆发,确保及时治疗,并通过提供快速,易于使用的测试。
    BACKGROUND: There is an increasing disease trend for SARS-COV-2, so need a quick and affordable diagnostic method. It should be highly accurate and save costs compared to other methods. The purpose of this research is to achieve these goals.
    METHODS: This study analyzed 342 samples using TaqMan One-Step RT-qPCR and fast One-Step RT-LAMP (Reverse Transcriptase Loop-Mediated Isothermal Amplification). The One-Step LAMP assay was conducted to assess the sensitivity and specificity.
    RESULTS: The research reported positive samples using two different methods. In the RT-LAMP method, saliva had 92 positive samples (26.9%) and 250 negative samples (73.09%) and nasopharynx had 94 positive samples (27.4%) and 248 negative samples (72.51%). In the RT-qPCR method, saliva had 86 positive samples (25.1%) and 256 negative samples (74.8%) and nasopharynx had 93 positive samples (27.1%) and 249 negative samples (72.8%). The agreement between the two tests in saliva and nasopharynx samples was 93% and 94% respectively, based on Cohen\'s kappa coefficient (κ) (P < 0.001). The rate of sensitivity in this technique was reported at a dilution of 1 × 101 and 100% specificity.
    CONCLUSIONS: Based on the results of the study the One-Step LAMP assay has multiple advantages. These include simplicity, cost-effectiveness, high sensitivity, and specificity. The One-Step LAMP assay shows promise as a diagnostic tool. It can help manage disease outbreaks, ensure prompt treatment, and safeguard public health by providing rapid, easy-to-use testing.
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