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排序方式: 共有133条查询结果,搜索用时 31 毫秒
1.
目的 分析马尔尼菲篮状菌(TM)感染性淋巴结炎的临床病理特点。方法 回顾性分析15例TM感染性淋巴结炎的临床资料、病理形态特点、病原体检查、治疗情况等。结果 15例TM感染性淋巴结炎中,男14例,女1例,年龄26~67岁,平均(49.1±11.87)岁,包括13例艾滋病和2例糖尿病患者,伴有颈部、锁骨上、腋窝、腹股沟等部位浅表淋巴结肿大。粗针穿刺的条索状淋巴结组织,其结构全部或部分被炎性病变所取代,8例显微镜下形态以吞噬病原体的组织细胞弥漫性浸润为主;5例以广泛凝固性坏死为主伴散在少量病原体及核碎屑;2例以成纤维细胞小结节状增生,形成肉芽肿结构的改变为主,多核巨细胞少、散在分布。病原体大小、形态较一致,呈圆形、椭圆形或腊肠状,团聚成簇,如桑葚样,淀粉酶消化后过碘酸希夫及六胺银染色可见包含横隔的菌体结构。15例患者血液、肺泡灌洗液、痰液或者淋巴结抽出液真菌培养均查见TM生长。临床及时抗真菌治疗,15例患者病情好转后出院。结论 TM感染性淋巴结炎往往是全身侵袭性TM病晚期阶段的突出表现之一,容易被临床误诊,通过淋巴结粗针穿刺活检及早明确诊断,以免延误治疗,从而提高治愈率。  相似文献   
2.
 黄曲霉菌属于曲霉科,是仅次于烟曲霉菌的第二大曲霉病诱发菌,多发于肺、鼻窦、眼,肾盂感染罕见。本例患者因黄曲霉菌感染肾盂诱发急性肾衰竭。使用两性霉素B局部及全身用药,治疗效果好,肾功能恢复。  相似文献   
3.
Talaromyces marneffei (T. marneffei) is a dimorphic fungus that causes systemic infection in immunocompromised patients. Here, we present a case of T. marneffei infection in an immunocompetent patient with an osteolytic lesion. Diagnosis was established by fungal culture. The patient responded rapidly to intravenous voriconazole, followed by oral voriconazole. We reviewed 18 reported cases of T. marneffei infection with osteolytic lesions, which suggests a much higher rate of osteolytic lesions in immunocompetent patients than previously thought.  相似文献   
4.
摘要:目的 对1株植物内生真菌Talaromyces sp.的次级代谢产物进行研究。方法 采用稻米培养基培养,通过正反相 硅胶柱层析、Sephadex LH-20凝胶柱层析、半制备反相高效液相色谱等技术对发酵提取物进行分离纯化,运用质谱、核磁 共振、圆二色谱等波谱技术进行结构鉴定,采用MTT测定化合物的细胞毒活性。结果 从该菌株中共分离鉴定11个已知化 合物,其中包括9个聚酮类化合物(1~9)和2个环肽类化合物(10和11),分别为1-deoxyrubralactone(1)、alternariol(2)、alternariol 5-methyl ether(3)、altenuisol(4)、3-hydroxyalternariol 5-O-methyl ether(5)、(2'R,4'R,5'R)-altenuene(6)、(2'S,4'R,5'R)-isoaltenuene(7)、 (2'R,4'R,5'R)-altenuene-5'-acetoxyester(8)、7-hydroxy-3,5-dimethyl-isochromen-1-one(9)、腾毒素(10)和二氢腾毒素(11)。结论 化合 物1、化合物3~11为首次从该属菌株中分离,化合物2和3在100 μmol/L的浓度下对人膀胱癌J82细胞株具有抑制活性,抑制率分 别为56.9%和59.7%。  相似文献   
5.
6.
Patients with anti-interferon (IFN)-γ autoantibodies have weakened immune defenses against intracellular pathogens. Because of its low incidence and non-specific symptoms, diagnosis of anti-IFN-γ autoantibody syndrome is difficult to establish during the early stages of infection. Here, we report a patient with high titers of serum anti-IFN-γ autoantibodies suffering from opportunistic infections. The patient presented with intermittent fever for 2 weeks. During his first hospitalization, he was diagnosed with Talaromyces marneffei pulmonary infection and successfully treated with antifungal therapy. However, multiple cervical lymph nodes subsequently became progressively enlarged. Mycobacterium abscessus infection was confirmed by positive cervical lymph node tissue cultures. High-titer serum anti-IFN-γ antibodies were also detected. Following anti-M. abscessus therapy, both his symptoms and lymph node lymphadenitis gradually improved. Anti-IFN-γ autoantibody syndrome should be considered in adult patients with severe opportunistic coinfections in the absence of other known risk factors.  相似文献   
7.
Aspergillus flavus is a commonly found fungal pathogen, which produces aflatoxins, highly toxic and hepatocarcinogenic natural compounds. Inhibition of fungal alpha amylase activity has been found to limit the ability of the fungus to produce aflatoxins. Berberine, an isoquinoline alkaloid commonly found in many medicinal plants, was identified to inhibit the growth of A. flavus. The amount of berberine required to inhibit the fungal mycelial growth was determined. The compound was also found to inhibit the alpha amylase from the A. flavus. The binding affinity of the compound toward alpha amylase and the enzyme inhibitory activity have been determined by enzyme kinetic studies and Isothermal Titration Calorimetric analysis. Molecular modeling and docking studies were carried out to understand the enzyme–ligand interactions.  相似文献   
8.
《Toxin reviews》2013,32(3-4):123-129
Evaluation of corn genotypes for resistance to aflatoxin accumulation has evolved over the past 30 years. Inoculation techniques have been developed to ensure that plants are exposed to Aspergillus flavus and resistant genotypes can be identified. We compared two inoculation techniques (side needle and knife) and different inoculation rates in Georgia and Mississippi. The relative performance of side-needle and knife inoculation techniques did not change or interact significantly across site years, suggesting that both the needle and knife are consistent inoculation techniques for discriminating between resistant and susceptible corn hybrids at the Mississippi State and Tifton locations.  相似文献   
9.
 目的 总结2例人类免疫缺陷病毒(HIV)阴性儿童马尔尼菲篮状菌病(TSM)患儿的临床特征。方法 分析某儿童医院收治的2例HIV阴性TSM患儿的临床特点及实验室资料、存在的基础疾病,并复习相关文献,总结TSM感染患儿的临床特征及诊治经验。结果 2例HIV阴性TSM患儿中病例1以右下肢肿块为首发症状,1个月余后才出现发热及咳嗽,误诊为结核感染;病例2以发热、三系减少及肝脾、淋巴结大等表现起病。病例1行基因检测为STAT1基因突变,病例2有反复灰指甲及口腔溃疡病史,均行血、骨髓培养及淋巴结活检确诊。病例1先后予以伏立康唑、两性霉素B脂质体静脉滴注,伊曲康唑口服维持治疗,共治疗1年后停药;病例2一直予以伏立康唑治疗(先静脉滴注后口服),共7个月后停药,均无复发。结论 TSM可发生在HIV阴性儿童,且可存在STAT1基因突变。对于治疗效果差的患儿,应尽早行培养或组织活检以明确诊断,并积极查找TSM可能存在的基础疾病,以到达早期诊断、早期治疗和改善预后的目的。  相似文献   
10.
Ecology and Population Biology of Aflatoxigenic Fungi in Soil   总被引:1,自引:0,他引:1  
《Toxin reviews》2013,32(2-3):351-379
Soil serves as a reservoir for Aspergillus flavus and A. parasiticus, fungi that produce carcinogenic aflatoxins in agricultural commodities. Populations in soil are genetically diverse and individual genotypes show a clustered distribution pattern within fields. Surveys over large geographic regions suggest that climate and crop composition influence species density and aflatoxin‐producing potential. Aflatoxigenic fungi reside in soil as conidia, sclerotia and hyphae, which act as primary inocula for directly infecting peanuts or for infecting aerial crops (corn, cottonseed, tree nuts) through wind and insect dispersal. Infected crops periodically replenish soil populations during drought years.  相似文献   
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