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107篇 您的检索式:作者名="Doenhoff"
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1血吸虫对吡喹酮抗药性的研究 Ⅺ日本血吸虫中国大陆现场分离株虫卵毛蚴尾蚴对吡喹酮的敏感性显示文摘目的测定日本血吸虫中国大陆主要流行区现场分离株虫卵、毛蚴和尾蚴阶段对吡喹酮的敏感性,为建立日本血吸虫吡喹酮敏感性检测技术提供基础。方法分别从中国湖南、湖北、江西、安徽、江苏和云南6省日本血吸虫病流行区病人粪便标本中分离虫卵,建立日本血吸虫现场分离虫株;采用实验室已有的3株曼氏血吸虫株为对照。将各虫株虫卵分别孵育于5×10-6、10-6、5×10-7、10-7mol/L吡喹酮溶液中24h后移至清水孵化,观察虫卵的孵化率。将各虫株毛蚴分别暴露于5×10-6、10-6、5×10-7、10-7mol/L吡喹酮溶液中,0、1、5min后观察比较毛蚴的运动及形态学变化。将各虫株尾蚴分别暴露于10-5、6×10-7、4×10-7、10-7mol/L吡喹酮溶液中,0、20、40、60、80、100min后,解剖镜下观察尾蚴的泳动、收缩和断尾率的变化。并将结果与曼氏血吸虫株进行比较。结果经10-6,5×10-7、10-7mol/L吡喹酮溶液中24h后,日本血吸虫虫卵的孵化率分别为0.52%、11.90%和49.15%,曼氏血吸虫分别为4.17%、31.37%和92.53%。当暴露于10-6mol/L吡喹酮1min后,日本血吸虫毛蚴的变形率为100.00%,曼氏血吸虫为55.73%;当分别暴露于5×10-7、10-7mol/L吡喹酮5min后,日本血吸虫毛蚴的变形率为96.82%和21.80%,曼氏血吸虫毛蚴为21.80%和0。当暴露于10-5mol/L吡喹酮中40min,日本血吸虫尾蚴的断尾率为96.75%,曼氏血吸虫为28.30%;暴露于4×10-7mol/L吡喹酮中100min,日本血吸虫尾蚴的断尾率为95.82%,曼氏血吸虫为11.40%;当暴露于10-7mol/L吡喹酮中80min,日本血吸虫尾蚴的断尾率为29.65%,曼氏血吸虫尾蚴为0。结论日本血吸虫各现场分离株间在虫卵、毛蚴和尾蚴阶段对吡喹酮的敏感性无明显差异,但均明显高于曼氏血吸虫。研究提示,将毛蚴移入5×10-7mol/L吡喹酮溶液中1min,镜下观察其变形率,可作为日本血吸虫对吡喹酮敏感性的观察指标,可用于现场判断病人化疗失败的原因是否是由于吡喹酮不敏感株产生所引起。将尾蚴移入4×10-7mol/L吡喹酮溶液中80~100min,镜下观察其断尾率,可用于螺体内虫株吡喹酮敏感性监测。梁幼生 戴建荣 李洪军 汪伟 陶永辉 张键锋 李伟 朱荫昌 G.C. Coles M.J. Doenhoff 2007中国血吸虫病防治杂志2007,19,5:12
2血吸虫对吡喹酮抗药性的研究Ⅴ 吡喹酮对曼氏血吸虫吡喹酮抗性株和敏感株成虫皮层的损伤显示文摘目的 体内比较吡喹酮对曼氏血吸虫吡喹酮抗性株与敏感株成虫皮层的损伤程度。方法 用各虫株尾蚴分别感染小鼠,感染后第57天,以300mg/kg微粒化吡喹酮悬液对小鼠作灌胃治疗;在灌药后10、30min和1、12、24h后剖杀感染小鼠,门静脉灌注收集成虫,按常规方法制成扫描电镜标本,扫描电镜下观察成虫体表的变化。结果 吡喹酮诱导的皮层损伤主要为虫体表形成泡状结构的薄壁隆起;给药10min,敏感株雄虫皮层可见较多小泡状物,而抗性株则少见;1h后,敏感株虫体表可见大量的泡状物,泡状物溃破可形成皮层损伤灶,抗性株仅见少量的泡状物;24h后,敏感株雄虫体表完全受损,部分皮层剥落,暴露出肌肉层,而抗性株仅见少量泡状物和破损的泡状物。给药1h后,敏感株雌虫开始出现少量泡状物,抗性株雌虫体表未见泡状损伤;12h后,敏感株雌虫泡状物数量增加,抗性株仅在有限区域见少量泡状物。结论 抗性株和敏感株成虫体表吡喹酮诱导的皮层损伤程度存在明显差异,敏感株的损伤程度重于抗性株,雄虫重于雌虫。梁幼生 戴建荣 朱荫昌 李洪军 徐明 司进 许永良 杭盘宇 GC Coles MJ Doenhoff 2003中国血吸虫病防治杂志2003,15,4:7
3Drug-resistant schistosomiasis: re- sistance to praziquantel and oxamniquine induced in Schistosorna mansoni in mice is drug specific显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hyg1994,51,:1
4Drug-resistant schistosomiasis: resistance to praziquantel and oxanmiquine induced in Schistosoma mansoni in mice is drug specific显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hgy1994,51,1:1
5Drug-resistant schistosomiasis: resistance to praziquantel and oxamniquine induced in Schistosoma mansonl in mice is drug specific显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hyg1994,51,1:1
6Specific and sensitive di- agnosis of schistosome infection:can it be done with antibodies?显示文摘Doenhoff MJ Chiodini PL Hamilton JY 2004Trends Parasitol2004,20,1:1
7Drug-resistant schistosmiasis: resistance to praziquantel and oxamniquine include in schistosoma mansoni in mice is drug specific显示文摘Fallon PG Doenhoff M / 1994Am J Trop Med Hyg1994,51,1:1
8The immune-dependence of schistosomicidal chemotherapy: relative lack of efficacy of an antimonial in Schistosoma mansoni-infected mice deprived of their T-cells and the demonstration of drug-antiserum synergy显示文摘 Brain J 1978Clin Exp Imnunol1978,33,2:1
9A Study of Some Characteristics of Individual Clones of Schistosoma mansoni with Emphasis on the Biologiacal and Metabolic Activities 显示文摘AL-Adhami BH Doenhoff M Thornhill J 2001Parasitology2001,123,:1
10Active immunization of mice with Schistosoma mansoni worm membrane antigens enhances efficacy of praziquantel显示文摘Fallon PG Doenhoff MJ 1995Parasit Immunol1995,17,5:1
11Praziquantel: mechanisms of action, resistance and new derivatives for schistosomiasis显示文摘Doenhoff M J Cioli D Utzinger J 2008Curr Opin Infect Dis2008,21,6:1
12Development of a new assay for the diagnosis of schistosomiasis, using cercarial antigens 显示文摘Chand MA Chiodini PL Doenhoff MJ 2010Trans R Soc Trop Med Hyg2010,104,4:1
13Drug-resistance schistosomiasis: resistance to praziquantel and oxamniquine induced in Schistosoma manson in mice is drug specific显示文摘Fallon PG Doenhoff 1994Am T Trop Med Hyg1994,51,1:1
14Schistosoma mansoni-induced throm- bocytopenia in mice显示文摘Ngaiza JR Doenhoff MJ 1987Transa R Soc Trop Med Hyg1987,81,4:1
15A stage-specific calcium-binding protein expressed in eggs of Schistosoma mansoni显示文摘Moser D Doenhoff MJ Klinkert MQ 1992Molecular and Biochemical Parasitology1992,51,2:1
16Drug-resistant schistosomiasis: resis- tance to praziquantel and oxamniquine induced in Schistosoma mansoni in mice is drug specific 显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hyg1994,51,1:1
17Drug-resistant schistosomiasis: resistance to praziquantel and oxamniquine induced in Schistosoma mansoni in mice is drug specific显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hyg1994,51,1:1
18Studies on the host-parasite relationship in Schistosoma mansoni-infected mice : the immunological dependence of parasite egg excretion 显示文摘Doenhoff M Musallam R Bain J 1978Immunology1978,35,5:1
19Drug-resistant schistosomiasis: resistance to praziquantel and oxamniquine induced in Schistosoma mansoni in mice is drug specific显示文摘Fallon PG Doenhoff MJ 1994Am J Trop Med Hyg1994,51,1:1
20Praziquantel : mechanisms of action, resistance and new derivatives for schistosomiasis 显示文摘Doenhoff MJ Cioli D Utzinger J 2008Curr Opin Infect Dis2008,21,6:1
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