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Global ITS diversity in the sporothrix schenckii complex

Fungal Diversity 2014年第3期66卷 153-165页

作者： Xun Zhou Anderson M.Rodrigues Peiying Feng G.S.de Hoog Department of Dermatology Affiliated Hospital of Chongqing Medical UniversityChongqingChina Centraalbureau voor Schimmelcultures KNAW Fungal Biodiversity Centre PO Box 851673508 AD UtrechtThe Netherlands Department of Microbiology Immunology and Parasitology-DMIPCellular Biology DivisionFederal University of São Paulo-UNIFESPSão PauloBrazil Third Affiliated Hospital Sun Yat-sen UniversityGuangzhouChina Sun Yat-Sen Memorial Hospital Sun Yat-Sen UniversityGuangzhouChina Institute for Biodiversity and Ecosystem Dynamics University of AmsterdamAmsterdamThe Netherlands Peking University Health Science Center Research Center for Medical MycologyBeijingChina

Molecular phylogeny has revealed that sporotrichosis is caused by several sporothrix species which differ in clinical *** complex is embedded within Ophiostoma,a genus mainly comprising fungi that live in association with bark beetles,but differs by a high virulence towards humans and other *** different ecology is corroborated by phylogenetic *** aim of the present study was to determine the validity of the rDNA internal transcribed spacer(ITS)region as a marker for diagnostics of species in the clinical group,using betatubulin sequences to calibrate species *** topology of the two gene trees was concordant,and all clinically relevant sporothrix species could easily be recognized by means of the ITS *** increased geographic sampling did not affected delimitation success in the clinical clade of the *** complex.

关键词： sporothrix schenckii Sporotrichosis Taxonomy Phylogeny ITS Barcoding

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Differential mRNA expression of sporothrix schenckii catalase gene in two growth phases and effect factors

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Chinese Medical Journal 2008年第20期121卷 2100-2102页

作者： WANG Xiao-hui LI Ruo-yu CAO Cun-wei WANG Yu-hong LIU Wei QIAO Jian-jun LI Yu-zhen Department of Dermatology Second Hospital of Harbin Medical University Harbin Heilongjiang 150086 China Department of Dermatology First Hospital of Peking University Research Center for Medical Mycology Peking University Beijing 100034 China Department of Dermatology First Hospital of Guangxi Medical University Nanning Guangxi 530021 China Department of Geriatriacs First Hospital of Harbin Medical University Harbin Heilongjiang 150001 China

sporothrix schenckii （S. schenckii）, a dimorphic fungus, is the etiological agent of sporotrichosis. After entrance of microconidia or mycelial fragments into a mammalian host, the fungus differentiates into the parasitic yeast form. Meanwhile, several defensive signals would be triggered when the innate immune system was stimulated by S. schenckii invasion and microbe-specific phagocytosis. The success of S. schenckii infection partly depends on its ability to avoid oxidative damage from reactive oxygen species （ROS） released by polymorphonuclear leukocytes and activated macrophages. However, the antioxidant defense mechanisms of S. schenckii remains unknown. Catalases, one of the central enzymes involved in scavenging ROS via converting hydrogen peroxide （H2O2） to water and molecular oxygen, play an essential role in protecting intracellular pathogenic fungi against ROS and regulating growth and development in some fungi. No catalase in S. schenckii has been identified and characterized previously. Recently we have cloned a catalase homologous gene from the yeast form of S. schenckii and designated it Sscat. In this report,

关键词： sporothrix schenckii catalase mRNA

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Limphocutaneous Sporotrichosis Due to sporothrix schenckii var schenckii: A Relapsing Case after Treatment with Potassium Iodide in Elderly

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Advances in Microbiology 2022年第4期12卷 192-197页

作者： Eder R. Juárez-Durán Sabrina Escandón-Pérez Fritz Cajuste-Sequeira Luis M. Sánchez-Navarro Carlos A. Barrera-Ochoa Rigoberto Hernández-Castro Roberto Arenas General Hospital Mexico City Mexico ángeles Lomas Hospital Mexico City Mexico La Habana University Havana Cuba Dermatologist General Hospital Oaxaca Mexico General Hospital Mexico City Mexico Pathogen Ecology Department General Hospital Mexico City Mexico

Sporotrichosis is a subcutaneous mycosis caused by the sporothrix schenckii complex. It has three classic clinical variants: fixed, lymphangitic, and systemic. Treatment in most cases has been itraconazole or potassium iodide. The aim of this paper is to communicate an unusual relapsing case treated with IK. We report a 73-year-old woman with lymphangitic sporotrichosis, adequate response to treatment with potassium iodide, and recurrence 15 months after. A molecular test was performed through the amplification of a 331 bp fragment of the calmodulin gene. In both infections, the same specie was isolated. The effects of potassium iodide are briefly discussed, and we conclude that the same treatment can be prescribed, if no side effects are observed.

关键词： Sporotrichosis Lymphangitic Sporotrichosis sporothrix schenckii Recurrence Potassium Iodide

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