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免疫抑制BALB/c小鼠系统性白假丝酵母菌感染生物指标模型的建立
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作者 李继红 邓洁华 +1 位作者 赵宜乐 王刚生 《中国感染控制杂志》 CAS 北大核心 2018年第10期878-883,共6页
目的探讨经腹腔注射白假丝酵母菌建立免疫抑制BALB/c小鼠系统性感染的生物指标模型,为研究白假丝酵母菌感染的致病机制和抗真菌药物的药效学提供相关动物模型。方法对免疫抑制组BALB/c小鼠(腹腔注射环磷酰胺200 mg/kg·d,连续2 d)... 目的探讨经腹腔注射白假丝酵母菌建立免疫抑制BALB/c小鼠系统性感染的生物指标模型,为研究白假丝酵母菌感染的致病机制和抗真菌药物的药效学提供相关动物模型。方法对免疫抑制组BALB/c小鼠(腹腔注射环磷酰胺200 mg/kg·d,连续2 d)经腹腔注射白假丝酵母菌增强毒力株0.25 mL(浓度为1×10^(7 )CFU/mL)建立系统性白假丝酵母菌感染模型;取小鼠尾静脉血进行白细胞和中性粒细胞计数,取小鼠组织进行真菌镜检、培养、病理检查以及(1,3)-β-D-葡聚糖检测。结果免疫抑制组与对照组小鼠用药后第4天白细胞计数、中性粒细胞计数、平均体重比较,差异均具有统计学意义(均P<0.05)。白假丝酵母菌感染组生存率为30.00%,对照组生存率为100.00%,两组生存率比较,差异有统计学意义(P<0.05)。对注射真菌后第2~14天死亡小鼠以及第14天存活小鼠进行解剖,发现肺、肝、肾组织出现多处脓肿,以肾组织感染最为显著;小鼠组织真菌直接镜检可见大量菌丝体,组织培养均为白假丝酵母菌,组织病理可见大量菌丝体、炎细胞及组织坏死。白假丝酵母菌感染组肺、肾组织(1,3)-β-D-葡聚糖均增高,与对照组比较,差异均有统计学意义(均P<0.05)。结论本实验方法可以成功建立免疫抑制BALB/c小鼠系统性白假丝酵母菌感染的动物模型。 展开更多
关键词 白假丝酵母菌 组织真菌学 组织病理学 (1 3)-β-D-葡聚糖 感染
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Study on the Biology and Epidemiology of Uncinula necator---The Causal Agent of Grape Powdery Mildew Disease 被引量:1
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作者 Karbalaei Khiavi Haji Shikhlinski +2 位作者 Babaei Ahari Asgar Heydari Mahammad Akrami 《Journal of Environmental Science and Engineering(A)》 2012年第4期574-579,共6页
This study was carried out during 2007-2009 in the vineyards of Ardebil province of lran to study the biology and the epidemiology of Uncinula necator--the causal agent of grape powdery mildew disease. The study conce... This study was carried out during 2007-2009 in the vineyards of Ardebil province of lran to study the biology and the epidemiology of Uncinula necator--the causal agent of grape powdery mildew disease. The study concentrated on the survival and the initiation of primary inoculum of the fungal causal agent. Results of histopathological experiments indicated that U. necator survived as mycelium in the dormant buds of the grapes during winter season. Results of study on the effect of environmental factors on fungus biology showed that the pathogenic activity of the fungus began when the temperature was between 16-19 ℃ with a relative humidity more than 50%. It was also found that optimum temperature and relative humidity for the sporulation of U.necator was 20-25 ~C and 50%-100% respectively. According to the results, fungal conidia were trapped during formation of 5-6 true leaves and first disease symptoms were observed on the clusters on late June after fruit formation. Fungal cleistothecia were observed abundantly at the end of season on the leaves, petioles and twigs but they were not able to survive during winter. Formation of ascospores on young leaves was proved but their role as the primary inoculum was not supported by the results of this study. Results of this study and the new findings on the biology and epidemiology of U.necator may be of national and international interests for the management of powdery mildew disease which is one of the most destructive diseases around the world including Iran. 展开更多
关键词 GRAPE powdery mildew Uncinula necator HISTOPATHOLOGY epidemiology.
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