阴性的

The undraped technician's console was sampled in each case as a positive control and an additional 25 C-arm drapes were swabbed immediately after they were applied to the C-arm unit in order to obtain negative controls.

在没有使用帷幕覆盖的悬臂处取样作为阳性对照组，并且再使用25个帷幕，在将它们罩上C形臂透视机后立即取样作为阴性对照组。

Molecular analysis and disease-resistance test The regenerated kanamycin resistant plants were analyzed by PCR andPCR-Southern reaction with the untransformed plants as negative control, plasmidDNA as positive control.

转基因植株分子检测及抗病性鉴定以未转化植株为阴性对照，质粒DNA为阳性对照，nptⅡ基因和chit42基因的特异引物进行PCR和PCR-Southern检测。

Abstract］ Objective To diagnose negative ureterolith with 3D reconstruction of multi-slice helical CT.

目的 应用多层螺旋CT的三维重建诊断阴性输尿管结石。

The positive rate of escherichia coli was the highest followed by co-agulase negative staphylococci,klebsiella pneumoniae and blue verditer pseudomonas.

阳性率最高的是大肠埃希菌，其次是凝固酶阴性葡萄球菌、克雷伯菌、铜绿假单胞菌。

Concl us ion:The main factors that induce severe infection in bronchiectasis were the lowered immune function in the patients and the infection of Gram-negative bacteria,especially blue verditer pseudomonas.

结果：患者免疫功能低下和革兰氏阴性杆菌特别是铜绿假单孢杆菌感染是引起支扩感染加重住院的主要因素。

Results In 30 sera with anti-Toxoplasma IgM antibodies and 28 with IgG antibodies, the sensitivity for IgM and IgG antibody detection was 90.0%（27/30） and 85.7%（24/28） respectively, the specificity was all 100% in examining 40 healthy control sera, and the Youden index was 0.9 and 0.86 respectively.

结果 用免疫印迹试剂盒检测30份弓形虫IgM和28份IgG阳性血清，敏感性分别为90.0%（27/30）和85.7%（24/28），40份健康对照者血清的弓形虫IgM和IgG抗体均为阴性，特异性均为100%，Youden指数分别为0.9和0.86。

Results: The positive detection ratio of IHC and nested PCR were 64.2% and 81.1%, respectively. It was showed that the positive detection ratio of nested PCR was significantly higher than that of IHC (P.01). The nested PCR assay had advantages over IHC on sensitivity, specificity, Youden's index, positive predictive value and negative predictive value.

结果：免疫组化检测和巢式PCR检测的阳性检出率分别为64.2%和81.1%，巢式PCR技术检测肾癌组织支原体在灵敏度、特异度、约登指数、阳性预测值和阴性预测值方面均优于免疫组化技术。

EMB-resistance in 18 isolates was caused by the mutation at coden 306 in embB gene with positive rate of 62.1%. The PCR result was negative in 20 specimen from pulmonary diseases without active TB and 5 negative control strains of no MTB. The data in this study showed high specificity of 100%. Only one specimen in 7 specimen with negative result in acid-fast stain and cultivation was shown alteration in coden 306 in embB gene.

结果：130例活动性肺结核患者痰标本抗酸染色阳性38例，阳性率为29.2%(38/130)；罗氏培养阳性为79例，阳性率为60.8%(79/130)。79例培养阳性痰标本中耐乙胺丁醇29例，其中有18例在embB基因met306ATG突变，基因突变率为62.1%。20例非结核肺部疾病患者痰标本和5株非结核分枝杆菌菌株经套式PCR扩增全部为阴性，特异性为100%。7例涂阴培阴PCR扩增阳性的序列中有1例在embB基因306位密码了发生突变。

Background and Objective Helicobacter pylori, a microaerophilic, spiral and gram-negative bacillus is recognized as a human-specific gastric pathogen that colonizes the stomaches of at least half of the worlds populations.

背景和目的幽门螺杆菌(Helicobacter pylori，Hp)是微需氧的革兰阴性杆菌，呈螺旋状。

If a cervical Gram stain is positive for Gram-negative intracellular diplococci, the probability of PID greatly increases; if negative, it is of little use.

如果宫颈涂片提示细胞内革兰染色阴性双球菌，盆腔炎的可能性大大提高；否则，宫颈涂片几乎没有诊断价值。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。