恶性疟疾重组质粒pPF_（14）DNA探针的制备

采用基因克隆技术，将恶性疟原虫（Ｐｌａｓｍｏｄｉｕｍｆａｌｃｉｐａｒｕｍ）ｐＰＦ１４质粒转化大肠杆菌ＨＢ１０１，经扩增后碱裂解法提取质粒ＤＮＡ，核酸内切酶酶切图谱分析鉴定后，低熔点胶法回收而获得高纯度和高回收率的插入片段（ｐＰＦ１４ＤＮＡ），经３２Ｐ标记后具较高敏感性与特异性，该探针制备方法具简便、稳定、省时的优点。本文对各制备程序进行了探讨。

Use of (Dig)-DNA Probe for the Epidemiological Survey of Plasmodium falciparum Malaria

The Plasmodtum falctparum DNA fragment was isolated from a cloned recombinant plasmid pPF14. labelled with Digoxigenin (Dig) and used as a probe (pPF14-F-Dig)to detect 274 blood samples from the eqdemic area population in Hainan Province by dot hybridization.The results showed that out of 274 blood specimens one was positive when using microscopic examination and the positivity rate was 0.36 percent. Fifteen samples showed to be positive (including one positive specimen examined by microscopy) when this probe was applied to detect the 274 samples and its positivity rate was 5.47 percent.The positive coincidence rate between pPF14-F-Dig and microscopic examination was 1/1 and the negative coincidence rate was 94.87 percent. Since a piece of nitrocellulose membrane with the size of 9 by 12 square centimetres can accommodate blots of 96 samples,this probe is fit for large-scale epidemiological surveys.

应用(Dig)-DNA探针进行恶性疟流行病学调查

重组的恶性疟原虫DNA片段用洋地黄毒苷配基标记后作为探针(pPF_(14)-F-Dig),以斑点杂交试验对海南省恶性疟流行区人群的274份血样进行检测,并同时作厚薄血片镜检。结果显示,274例样本中血片镜检阳性1例,带虫率为0.36%;pPF_(14)-F-Dig 探针检出阳性15例(其中1例为镜检阳性者),阳性率为5.47%;pPF_(14)-F-Dig 与镜检的阳性符合率为1/1,阴性符合率为94.87%。每张硝酸纤维素膜可查96份样本,故该探针具有用于大规模流行病学调查的价值。

中西医结合治疗乙型慢性活动性肝炎的疗效观察

对４１例乙型慢性活动性肝炎（ＣＡＨ）患者随机分为二组，一组（简称治疗组）（２１例）口服活血化瘀中药，同时静脉滴注强力宁注射液８０～１００ｍｌ／天，疗程３个月；另一组（简称对照组）（２０例）为常规用一般护肝药，疗程３个月。结果中西医结合治疗组降ＧＰＴ有效率为８６％，对照组为７４％ ；中西医结合组ＨＢｅＡｇ阴转率为５５％，抗ＨＢｅ阳转率为３７．５％，对照组分别为１６．６％、８．３％（Ｐ＜０．０５）。结果提示，中西医结合治疗ＣＡＨ效果较好。