Spores, Fungal

孢子,真菌
  • 文章类型: Journal Article
    真菌是影响动物皮肤的最常见的传染因子之一。皮肤可以作为真菌感染的入口,最终会被传播。在世界的一些地区,卵菌,如Pythium和Lagenium,也是造成大量严重皮肤感染的原因。真菌形态学的组织学评估,包括尺寸,形状,隔膜,分支,和萌芽特征,结合不同皮肤层内炎症浸润的分布,可以潜在地确定病因,指导抗真菌药和其他诊断的选择。皮肤表面的真菌感染通常是由马拉色菌引起的,很少是念珠菌。机会性真菌也能够在皮肤表面定殖,尤其是当屏障被打破时。Folliculocentric感染,由皮肤癣菌引起的,导致轻度至重度炎症,偶尔会深入皮肤。种类繁多的真菌,包括口疮真菌病,phaeophyphysp真菌病,和双态真菌感染,以及卵菌,导致皮肤和皮下结节性病变。偶尔除了双态真菌,真菌物种形成通常需要在新鲜组织上进行培养。然而,分子技术,例如石蜡块上的泛真菌聚合酶链反应,正成为区分皮肤真菌病原体的越来越有用的工具。这篇综述着重于描述影响动物皮肤的最常见真菌和卵菌感染的临床和组织学特征,根据病变的分布模式和真菌或卵菌的形态进行划分。
    Fungi are among the most common infectious agents affecting the skin of animals. The skin can serve as a port of entry for fungal infections, which can eventually become disseminated. In some regions of the world, oomycetes, such as Pythium and Lagenidium, are also responsible for a significant number of severe cutaneous infections. Histologic evaluation of fungal morphology, including size, shape, septation, branching, and budding characteristics, combined with the distribution of inflammatory infiltrates within different skin layers can potentially identify etiologic agents, guiding selection of antifungals and additional diagnostics. Fungal infections of the skin surface are typically caused by Malassezia and rarely Candida, with opportunistic fungi also capable of colonizing the skin surface, especially when the barrier is broken. Folliculocentric infections, caused by dermatophytes, result in mild to severe inflammation and can occasionally penetrate deep into the skin. A wide range of fungi, including agents of hyalohyphomycosis, phaeohyphomycosis, and dimorphic fungal infections, as well as oomycetes, result in nodular cutaneous and subcutaneous lesions. With the occasional exception of dimorphic fungi, fungal speciation often requires cultures performed on fresh tissues. However, molecular techniques such as pan-fungal polymerase chain reaction on paraffin blocks is becoming an increasingly useful tool to distinguish between cutaneous fungal pathogens. This review focuses on describing the clinical and histologic features of the most common fungal and oomycete infections affecting the skin of animals, divided according to distribution patterns of lesions and fungal or oomycete morphology.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    花粉和真菌孢子的远程大气运输模型需要四个模块来发展:(i)气象模块:其中包含气象模型,它可以耦合到具有相同输出配置(时空分辨率)的运输模型,或未耦合不一定具有相同的输出参数。(二)排放模块:确定生物气溶胶的质量通量,它可以通过综合物候模型和气象因素的复杂参数化或通过简单的排放因子来完成。(iii)排放源模块,具体指林业/农学地图或,在草药和真菌的情况下,到潜在的排放地理区域。在这些地图中获得最高可能的分辨率允许在建模中建立更大的可靠性。(四)大气传输模块,与各自建立的输出参数。本文的回顾和后续分析,在1998年至2016年发表的电子科学文章上进行。在64篇文章中找到的总共101个模型中,33%进行了正向建模(使用15种不同的模型),67%进行了反向建模(使用3种不同的模型)。88%的病例适用于花粉(13个分类单元),12%适用于真菌孢子(3个分类单元)。关于发射模块,22%使用参数化(四个不同的参数)和10%的排放因子。最常用的运输模型是HYSPLIT(59%:向后56%和向前3%),其次是SILAM10%(全部向前)。主要结论是,花粉和真菌孢子的远距离运输模型对发展具有很高的技术科学要求,主要限制是流量的建立和排放源。
    The long-range atmospheric transport models of pollen and fungal spores require four modules for their development: (i) Meteorological module: which contain the meteorological model, and it can be coupled to transport model with the same output configuration (spatio-temporal resolution), or uncoupled does not necessarily have the same output parameters. (ii) Emission module: settles the mass fluxes of bioaerosol, it can be done with a complex parameterization integrating phenological models and meteorological factors or by a simple emission factor. (iii) Sources of emission module, specifically refers to forestry/agronomy maps or, in the case of herbs and fungi, to potential geographical areas of emission. Obtaining the highest possible resolution in these maps allows establishing greater reliability in the modelling. (iv) Atmospheric transport module, with its respective established output parameters. The review and subsequent analysis presented in this article, were performed on published electronic scientific articles from 1998 to 2016. Of a total of 101 models applied found in 64 articles, 33 % performed forward modelling (using 15 different models) and 67 % made backward modelling (with three different models). The 88 % of the cases were applied to pollen (13 taxa) and 12 % to fungal spores (3 taxa). Regarding the emission module, 22 % used parametrization (four different parameters) and 10 % emission factors. The most used transport model was HYSPLIT (59 %: 56 % backward and 3 % forward) following by SILAM 10 % (all forward). Main conclusions were that the models of long-range transport of pollen and fungal spores had high technical-scientific requirements to development and that the major limitations were the establishment of the flow and the source of the emission.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    Colletotrichum is one of the most economically important fungal genera, which affects a wide range of hosts, specifically tropical and subtropical crops. Thus far, there have been several records of mycovirus infection in Colletotrichum spp., primarily by viruses of the Partitiviridae family. There have also been records of infections by mycoviruses of the Chrysoviridae family. Mycoviruses are (+)ssRNA and dsRNA genome viruses, which may or may not be enveloped. To date, no mycovirus with a DNA genome has been isolated from Colletotrichum spp. Typically, mycoviruses cause latent infections, although hypo- and hypervirulence have also been reported in Colletotrichum spp. In addition to its effects on pathogenic behavior, mycovirus infection can lead to important physiological changes, such as altered morphological characteristics, reduced vegetative growth, and suppressed conidia production. Therefore, research on mycoviruses infecting phytopathogenic fungi can help develop alternative methods to chemical control, which can cause irreversible damage to humans and the environment. From an agricultural perspective, mycoviruses can contribute to sustainable agriculture as biological control agents via changes in fungal physiology, ultimately resulting in the total loss of or reduction in the virulence of these pathogens.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    本工作是关于空气生物学领域应用建模的两篇综述中的第一篇。花粉和真菌孢子的空气生物学预测模型,通常定义为预测统计模型,威尔,在其他目标中,预测空气中的颗粒浓度或颗粒的动力学行为。这些模型可以分为基于观察的模型(OBM),基于物候的模型(PHM),或OTher模型(OTM)。这次审查的目的是表明,分析和讨论了花粉和孢子空气生物学研究中使用的不同预测模型。对1998年至2016年发表的与模型类型有关的电子科学文章进行了分析,分类单元和建模参数。在总共503项研究中,55.5%使用OBM(花粉为44.8%,真菌孢子为10.7%),38.5%的PHM(均在花粉上)和6%的OTM(在花粉上为5.4%,在真菌孢子上为0.6%)。OBM已被高频率地用于浓度预测。最常见的OBM模型是花粉的线性回归(503个中的18.5%)和真菌孢子的人工神经网络(4.6%)。在PHM中,主要用途是根据生长度日模型表征主要花粉季节(开花季节)。最后,OTM已用于估算未监测区域的浓度。花粉上的Olea(14,5%)和真菌孢子上的链格孢菌(4,8%)是最常见的分类群。每日浓度是OBM最建模的参数(25.2%),而PHM则是季节开始日(35.6%)。PHM方法包括更大的模型多样性并且使用比OBM更少的独立变量。此外,PHM显示比OBM更容易应用;然而,定义PHM中使用的参数的广泛标准(例如:授粉开始日)使得每个模型的使用频率低于其他模型。
    The present work is the first of two reviews on applied modeling in the field of aerobiology. The aerobiological predictive models for pollen and fungal spores, usually defined as predictive statistical models, will, amongst other objectives, forecast airborne particles\' concentration or dynamical behavior of the particles. These models can be classified into Observation Based Models (OBM), Phenological Based Models (PHM), or OTher Models (OTM). The aim of this review is to show, analyze and discuss the different predictive models used in pollen and spore aerobiological studies. The analysis was performed on published electronic scientific articles from 1998 to 2016 related to the type of model, the taxa and the modelled parameters. From a total of 503 studies, 55.5% used OBM (44.8% on pollen and 10.7% on fungal spores), 38.5% PHM (all on pollen) and 6% OTM (5.4% on pollen and 0.6% on fungal spores). OBM have been used with high frequency to forecast concentration. The most frequent model of OBM was linear regression (18.5% out of 503) on pollen and artificial neural networks (4.6%) on fungal spores. In the PHM, the principal use was to characterize the main pollen season (flowering season) based on the model of growth degree days. Finally, OTM have been used to estimate concentrations at unmonitored areas. Olea (14,5%) on pollen and Alternaria (4,8%) on fungal spores were the taxa most frequently modelled. Daily concentration was the most modelled parameter by OBM (25.2%) and season start day by PHM (35.6%). The PHM approaches include greater model diversity and use fewer independent variables than OBM. In addition, PHM show to be easier to apply than OBM; however, the wide range of criteria to define the parameters to use in PHM (e.g.: pollination start day) makes that each model is used with a lesser frequency than other models.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Journal Article
    BACKGROUND: Previous studies have reported that spore powder of Ganoderma lucidum (SPGL) may be effective for the treatment of Alzheimer\'s disease (AD). However, its efficacy is still inconclusive. Thus, this systematic review will aim to assess its efficacy and safety for AD.
    METHODS: We will search the electronic databases of Cochrane Central Register of Controlled Trials, EMBASE, MEDILINE, the Cumulative Index to Nursing and Allied Health Literature, Allied and Complementary Medicine Database, and Chinese Biomedical Literature Database to assess the efficacy and safety of SPGL for patients with AD from their inceptions to the present. All case-control studies and randomized controlled trials will be considered for inclusion in this study. Two review authors will independently perform the study selection, data extraction, and risk of bias evaluation.
    RESULTS: The primary outcome includes the cognitive status for patients. The secondary outcomes consist of the quality of life, AD symptoms, and adverse events.
    CONCLUSIONS: This systematic review will present the existing evidence for the efficacy and safety of SPGL for treating patients with AD.
    UNASSIGNED: The results of this systematic review will be disseminated by through peer-reviewed journals. It does not needs ethic approval, because it does not involve individual patient data.
    BACKGROUND: PROSPERO CRD42019119426.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

       PDF(Pubmed)

  • 文章类型: Journal Article
    Ganoderma lucidum is a well-known representative of mushrooms that have been used in traditional Chinese medicine for centuries. New discoveries related to this medicinal mushroom and its biological properties are frequently reported. However, only recently have scientists started to pay special attention to G. lucidum spores. This is in part because of the recent development of methods for breaking the spore wall and extracting biocompounds from the spore. Although some research groups are working with G. lucidum spores, data in the literature are still limited, and the methods used have not been systematized. This review therefore describes the main advances in techniques for breaking the spore wall and extracting biocompounds from the spore. In addition, the major active components identified and their biological properties, such as neurological activity and antiaging and cell-protective effects, are investigated because these are of importance for potential drug development.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Case Reports
    Pituitary aspergillosis is a very rare disease, documented in only 12 cases. Although seen in both immunocompetent and immunocompromised patients, serious invasive sequelae, such as meningoencephalitis and death, have been noted in immunocompromised patients. Immunocompromised patients are susceptible and require complex multidisciplinary care to contain the spread of infection and maximize outcomes. This is the first case report, to our knowledge, of pituitary aspergillosis in the setting of an organ transplant. A 68-year-old woman presented with cephalgia, left temporal hemianopsia, and ptosis. Non-contrast magnetic resonance imaging of the head revealed a sellar mass, which was believed to be a benign pituitary adenoma. She underwent trans-sphenoidal resection, and subsequent histopathologic examination showed aspergillosis. She was subsequently started on voriconazole. On postoperative day 3, she developed a left anterior cerebral artery ischemic stroke, likely from Aspergillus angioinvasion and occlusion. Her mental status declined further and she died when care was withdrawn.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Case Reports
    Microsporidia are opportunistic pathogens that usually cause a limited disease in the gastrointestinal tract. Occasionally, they can cause disseminated disease. In solid organ transplant recipients, disseminated disease has been reported only rarely. We describe a 68-year-old woman who presented with fever, cough, and acute kidney injury 6 months after kidney transplantation. Dissemination was confirmed by identification of microsporidial spores in urine and bronchoalveolar lavage fluid. Polymerase chain reaction analysis identified the species as Encephalitozoon cuniculi.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    暂无摘要。
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • DOI:
    文章类型: English Abstract
    这篇综述的重点是个体发育的一个阶段,其独特的特点是对不利因素的特定耐受性和长期保留基因组材料的能力。即,真菌孢子.主要部分致力于孢子典型的特定阶段的表征,这叫做休眠。提供了表征孢子的碳水化合物和脂质组成的数据,特别注意碳水化合物保护剂的作用,特别是,海藻糖和甘露聚糖,以及花筏在孢子发生过程中的作用。讨论了称为自身抑制剂和自身刺激剂的特殊化合物在退出休眠过程中的作用。最后一部分讨论了孢子播种材料在生物技术过程中的作用。孢子化学成分之间的相关性数据,他们保持休眠状态的能力,并考虑了发芽过程。首先提出了特殊的生物技术方法;它们可以保护孢子的发芽能力,孢子发生的加剧,最终发酵产物比例的变化,和产量的增加。
    This review is focused on one of the stages of ontogenesis distinctive by its particular tolerance to the action of unfavorable factors and ability to retain the genomic material for a long period of time, i.e., fungal spores. The major part is devoted to the characterization of the specific stage typical for spores, which is called dormancy. Data are presented characterizing the carbohydrate and lipid composition of spores, with special attention being paid to the role of carbohydrate protectors, in particular, trehalose and mannite, as well as to the role of rafts in the process of sporogenesis. The role of special compounds called autoinhibitors and autostimulators in the process of exit from dormancy is discussed. The final section deals with the role of spore seeding material in biotechnological processes. Data on the correlation between the chemical composition of spores, their ability to remain dormant, and the germination process are considered. Special biotechnological approaches are presented for the first; they allow for the preservation of the germinating ability of spores, intensification of sporogenesis, changes in the ratio of final fermentation products, and an increase in their yield.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

公众号