Objective:To compare histopathology and PCR based detection in diagnosis of experimentally induced toxoplasmosis of RH human strain of the parasite in murine models.Methods:A comparison of histopathology and PCR based...Objective:To compare histopathology and PCR based detection in diagnosis of experimentally induced toxoplasmosis of RH human strain of the parasite in murine models.Methods:A comparison of histopathology and PCR based detection was done to diagnose experimentally induced toxoplasmosis in ten inbred swiss albino mice after intraperitoneal inoculation of 100 tachyzoites of laboratory mantained human RH strain of the parasite.Tissue samples from lung,liver,spleen,brain,heart and kidney were taken and processed for histopathological examination while all the samples also were subjected to PCR,using primers directed to the multicopy of SAG 3 gene,in dublicates.Results:Histopathology revealed presence of tachyzoites only in liver while along with lung,liver,spleen and brain tissue yielded desired positive PCR amplicons.Conclusions:The SAG 3 based PCR is able to diagnose toxoplasmosis in those tissues which are declared negative by histopathological assay.展开更多
目的建立小鼠肺炎病毒RT-PCR检测方法,用于实验动物及实验动物相关样本的检测。方法选择小鼠肺炎病毒(pneumonia virus of mice,PVM)G基因保守序列设计合成引物,建立RT-PCR方法,并进行方法的特异性、敏感性、重复性和稳定性验证。应用...目的建立小鼠肺炎病毒RT-PCR检测方法,用于实验动物及实验动物相关样本的检测。方法选择小鼠肺炎病毒(pneumonia virus of mice,PVM)G基因保守序列设计合成引物,建立RT-PCR方法,并进行方法的特异性、敏感性、重复性和稳定性验证。应用建立的方法对日常送检的27只小鼠、9只大鼠、5只沙鼠肺组织样本和19只PVM感染小鼠肺组织样本,及8份国际实验动物理事会(the International Council for Laboratory Animal Science,ICLAS)国际比对样本进行检测。结果建立的方法与仙台病毒、呼肠孤病毒Ⅲ型、汉坦病毒、淋巴细胞脉络丛脑膜炎病毒无交叉反应。能够检测PVM DNA最小模板浓度为8.77×10拷贝/μL,可检测病毒最小滴度为10/mL。用放置-30℃冰箱保存12个月的引物和PVM质粒进行PCR检测,仍能扩增到约249 bp的目的条带。用建立的方法检测日常送检的27只小鼠、9只大鼠、5只沙鼠肺组织样本,结果均为阴性;检测19只PVM感染小鼠肺组织样本,有7只小鼠肺组织样本结果阳性;检测8份ICLAS国际比对样本,有1份样本小鼠肺炎病毒核酸阳性,均符合预期结果。结论建立的PVM RT-PCR方法特异、敏感,重复性、稳定性好,能够用于小鼠、大鼠、沙鼠等实验动物的监测及其相关样本的检测。展开更多
文摘Objective:To compare histopathology and PCR based detection in diagnosis of experimentally induced toxoplasmosis of RH human strain of the parasite in murine models.Methods:A comparison of histopathology and PCR based detection was done to diagnose experimentally induced toxoplasmosis in ten inbred swiss albino mice after intraperitoneal inoculation of 100 tachyzoites of laboratory mantained human RH strain of the parasite.Tissue samples from lung,liver,spleen,brain,heart and kidney were taken and processed for histopathological examination while all the samples also were subjected to PCR,using primers directed to the multicopy of SAG 3 gene,in dublicates.Results:Histopathology revealed presence of tachyzoites only in liver while along with lung,liver,spleen and brain tissue yielded desired positive PCR amplicons.Conclusions:The SAG 3 based PCR is able to diagnose toxoplasmosis in those tissues which are declared negative by histopathological assay.
文摘目的建立小鼠肺炎病毒RT-PCR检测方法,用于实验动物及实验动物相关样本的检测。方法选择小鼠肺炎病毒(pneumonia virus of mice,PVM)G基因保守序列设计合成引物,建立RT-PCR方法,并进行方法的特异性、敏感性、重复性和稳定性验证。应用建立的方法对日常送检的27只小鼠、9只大鼠、5只沙鼠肺组织样本和19只PVM感染小鼠肺组织样本,及8份国际实验动物理事会(the International Council for Laboratory Animal Science,ICLAS)国际比对样本进行检测。结果建立的方法与仙台病毒、呼肠孤病毒Ⅲ型、汉坦病毒、淋巴细胞脉络丛脑膜炎病毒无交叉反应。能够检测PVM DNA最小模板浓度为8.77×10拷贝/μL,可检测病毒最小滴度为10/mL。用放置-30℃冰箱保存12个月的引物和PVM质粒进行PCR检测,仍能扩增到约249 bp的目的条带。用建立的方法检测日常送检的27只小鼠、9只大鼠、5只沙鼠肺组织样本,结果均为阴性;检测19只PVM感染小鼠肺组织样本,有7只小鼠肺组织样本结果阳性;检测8份ICLAS国际比对样本,有1份样本小鼠肺炎病毒核酸阳性,均符合预期结果。结论建立的PVM RT-PCR方法特异、敏感,重复性、稳定性好,能够用于小鼠、大鼠、沙鼠等实验动物的监测及其相关样本的检测。