淋球菌与沙眼衣原体在性传播疾病感染情况的研究

目的研究淋球菌(NG)与沙眼衣原体(CT)在性传播疾病感染情况及特点。方法对90例性病患者泌尿生殖道分泌物做NG培养及血清用ELISA试验检测CT抗体。结果90例性病患者NG、CT 的感染率分别为70%、16.7%,NG合并CT的感染率达13.3%。男女性别间NG感染率差异有显著性( P<0.05)。NG、CT单一或合并感染率之间差异有非常显著性(P<0.01)。结论性病患者中NG感染率高,且有性别分布差异。淋病患者合并CT感染率较高。     

应用PCR技术检测淋球菌,沙眼衣原体及解脲支原体

淋球菌（NG）、沙眼衣原体（CT）、解脲支原体（UU）是导致生殖道感染的重要病原体,我们于1995年11月10日至1997年2月13日间应用PCR技术对诊断为生殖道感染的500例患者的生殖道分泌物进行NG、CT和UU检测,并进行分析,现报告如下：资料和方法三．临床资料;所选病例为泌尿男科及妇科门诊诊断为生殖道感染的患者,共500例,其中男260例,女240例;年龄为19～56岁,平均37.5岁;病程为3天～2年;所选病例皆具有生殖道感染的病状及体征,有305例有性乱史或配偶性乱史．2．方法：NG、CT、UU的检查皆采用聚合酶链反应（PCR）的方法,…     

用复合PCR检测淋球菌、沙眼衣原体和解脲支原体的感染研究

在性传播疾病中,泌尿生殖道感染的主要病原体是淋球菌、沙眼衣原体和解脲支原体,目前临床上常有多种病原体混合感染[1],其临床症状相似或无明显症状,给确诊和治疗带来不便。因此我们应用多重引物ＰＣＲ(ｍｕｌｔｉｐｌｅｘＰＣＲ),一次实验能从临床标本中检测出三种病原体...     

56例儿童淋球菌检测结果分析

淋病是侵犯泌尿生殖系统为主的性病 ,除急性外 ,还呈慢性经过 ,甚至有无症状感染者 ,这种无症状感染者因不被注意 ,具有流行病学上的重要意义。因此 ,快速、准确的淋菌检测结果 ,为临床提供重要的诊治依据 ,为此我们对 5 6例患儿的不同标本进行相同的系统检测 ,现报道如下。1　材料与方法1 1　病例选择　随机选择拟似淋病患儿 5 6例 ,其中男 2 1例 ,女 35例 ,年龄最小出生后 3d ,最大 14岁 ,父母均患淋病者 35例 ,单方患淋病者 15例。人均取材 3次者 2 1例 ,取材2次者 2 5例 ,取材 1次者 11例 ,合计取材 12 1份次。1 2　方法　 (1)眼分泌物…     

沿海地区淋球菌,沙眼衣原体及解脲支原休流行病帝分析

目的 了解中山市性传播疾病（ＳＴＤ）高危人群中淋球菌（ＮＧ）、沙眼衣原体（ＣＴ）及解脲支原体（ＵＵ）的感染状况,采用聚合酶链反应（ＰＣＲ）检测１４５２例ＳＴＤ患者的尿道（宫颈）拭子标本。结果３种病原体的总检出率为２５．９２,其中ＮＧ１３．７０％、ＣＴ３１．３４％、ＵＵ３２．７１％,混合感染率以ＣＴ最高（８２．８１％）,ＵＵ次之（７５．７８％）,ＮＧ为４９．２２％。非淋病性尿道炎（ＮＧＵ）、淋病性尿     

分子遗传学在衣原体分类和快速检测中的应用

衣原体为严格真核细胞寄生菌,可在动物和人中引起多种疾病。近年来,分子遗传学方法大大促进了衣原体分类和快速检测的发展。根据16s/23s rRNA的同源性将衣原体分为4个科,衣原体科分2个属。同时基因诊断方法的出现促进了衣原体检测的发展,靶序列主要是主要外膜蛋白基因、16s／23s rRNA基因和16s/23s rRNA本身、或者是与靶序列结合的探针。     

改良法克隆淋球菌特征核酸片段

目的：采用改良法克隆淋球菌特征核酸片段300bp到pBS.sk中,作为淋球菌检测试剂盒的阳性标本来源。方法：采用PCR扩增淋球菌特征核酸片段300bp,扩增条件：94℃30s,55℃1min,72℃1min,35个循环,另外用SmalI酶切,pBS,sk,与PCR产物采用改良法平端连接：连接温度14℃,72h,连接反应体积15μl,加10u SamlⅠ防止pBS.sk自连,连接完成后取5μl连接液转化200μlCaCl2制备的感受态受体菌JM109,用碱法提取重组子质粒,电泳比较质粒大小,PCR初筛,最后双酶切鉴定。结果：经过电泳比较质粒大小,PCR初筛,最后双酶切鉴定。结果：经过电泳比较质粒大小,PCR初筛,最后双酶切鉴定,得到5个克隆重组子。     

沙眼衣原体的基因诊断技术进展

由于沙眼衣原体是严格的细胞内寄生的微生物,使现有的检测方法灵敏度较低,难以适应当前的临床需要,核酸探针与核酸扩增相结合的技术展现了良好的检测效能,非创伤性标本亦成为研究热点。本文就这两方面的进展作一简要综述,并着重介绍了沙眼衣原体用于检测的基因结构及其基因诊断的方法。     

沿海地区淋球菌、沙眼衣原体及解脲支原体流行病学分析

目的　了解中山市性传播疾病 (STD)高危人群中淋球菌 (NG)、沙眼衣原体 (CT)及解脲支原体(U U)的感染状况 ,采用聚合酶链反应 (PCR)检测 145 2例 STD患者的尿道 (宫颈 )拭子标本。结果 3种病原体的总检出率为 2 5 .92 % ,其中 NG13.70 %、CT31.34%、U U32 .71% ,混合感染率以 CT最高 (82 .81% ) ,U U次之 (75 .78% ) ,NG为 49.2 2 %。非淋病性尿道炎 (NGU)、淋病性尿道炎 (GU)男性患者 CT的感染率高于女性 (P<0 .0 5 ) ,NGU女性患者 U U的感染率高于男性 (P<0 .0 1) ,在 GU中两者相差不大 (P>0 .0 5 )。病原体的检出率明显集中在 2 0～ 40岁年龄段 ,其 STD的感染率高达 85 .47%。提示应将他们列为主要的传染源和高危人群 ,作为 STD防治工作中的重点对象     

用复合PCR检测淋球菌、沙眼衣原体和解脲支原体的感染研究

在性传播疾病中,泌尿生殖道感染的主要病原体是淋球菌、沙眼衣原体和解脲支原体,目前临床上常有多种病原体混合感染[1],其临床症状相似或无明显症状,给确诊和治疗带来不便。因此我们应用多重引物ＰＣＲ(ｍｕｌｔｉｐｌｅｘＰＣＲ),一次实验能从临床标本中检测出三种病原体…     

Determination of the number of tuf genes in Chlamydia trachomatis and Neisseria gonorrhoeae

Restriction endonuclease fragments of DNA from Neisseria gonorrhoeae and Chlamydia trachomatis (mouse pneumonitis biovar) were hybridized to probes from the N-terminal and C-terminal portions of the Escherichia coli tufA gene. In common with other Gram-negative bacteria, the genome of N. gonorrhoeae was found to contain two homologous sequences (presumptive tuf genes). The C. trachomatis genome contained a single tuf sequence.     

Modelling of an association of Chlamydia trachomatis and Neisseria gonorrhoeae in in ovo experiments

In experiments in ovo mixed chlamydial and gonococcal infection has been obtained by the successive infection of developing chick embryos with C. trachomatis and N. gonorrhoeae into the yolk sack. The competitive interrelations between the associated microorganisms with respect to their pathogenicity characteristics for chick embryos have not been established. This simulator is intended for use in the primary selection of etiotropic chemical preparations capable of producing combined effect on C. trachomatis and N. gonorrhoeae.     

Detection of Chlamydia trachomatis by nucleic acid sandwich hybridization

Abstract Chromosomal DNA fragments from Chlamydia trachomatis serotype L2 were shotgun-cloned into pBR322. A C. trachomatis -specific clone was further subcloned to produce specific DNA reagents for the identification of C. trachomatis by nucleic acid sandwich hybridization. The chosen DNA reagents from serotype L2 also hybridized with all the other chlamydial serotypes tested, but not with the DNA from 41 unrelated organisms. The sensitivity of the sandwich hybridization test was 10⁶ DNA molecules. The applicability of the test for routine diagnostic use was demonstrated by a pilot study in which C. trachomatis was directly detected from genital specimens.     

Zinc and Chlamydia trachomatis

Zinc was noted to have significant effects upon the infection of McCoy cells by each of two strains of Chlamydia trachomatis. With a high or low Chlamydia inoculant, the number of infected cells increased up to 200% utilizing supplemental zinc (up to 1 X 10(-4) M) in the inoculation media compared with standard Chlamydia cultivation media (8 X 10(-6) M zinc). Ferric chloride and calcium chloride did not effect any such changes. Higher concentrations of zinc, after 2 hr of incubation with Chlamydia, significantly decreased the number of inclusions. This direct effect of zinc on the Chlamydia remained constant after further repassage of the Chlamydia without supplemental zinc, suggesting a lethal effect of the zinc. Supplemental zinc (up to 10(-4)M) may prove to be a useful addition to inoculation media to increase the yield of culturing for Chlamydia trachomatis. Similarly, topical or oral zinc preparations used by people may alter their susceptivity to Chlamydia trachomatis infections.     

Structures of glyceraldehyde 3‐phosphate dehydrogenase in Neisseria gonorrhoeae and Chlamydia trachomatis

Neisseria gonorrhoeae (Ng) and Chlamydia trachomatis (Ct) are the most commonly reported sexually transmitted bacteria worldwide and usually present as co‐infections. Increasing resistance of Ng to currently recommended dual therapy of azithromycin and ceftriaxone presents therapeutic challenges for syndromic management of Ng‐Ct co‐infections. Development of a safe, effective, and inexpensive dual therapy for Ng‐Ct co‐infections is an effective strategy for the global control and prevention of these two most prevalent bacterial sexually transmitted infections. Glyceraldehyde‐3‐phosphate dehydrogenase (GAPDH) is a validated drug target with two approved drugs for indications other than antibacterials. Nonetheless, any new drugs targeting GAPDH in Ng and Ct must be specific inhibitors of bacterial GAPDH that do not inhibit human GAPDH, and structural information of Ng and Ct GAPDH will aid in finding such selective inhibitors. Here, we report the X‐ray crystal structures of Ng and Ct GAPDH. Analysis of the structures demonstrates significant differences in amino acid residues in the active sites of human GAPDH from those of the two bacterial enzymes suggesting design of compounds to selectively inhibit Ng and Ct is possible. We also describe an efficient in vitro assay of recombinant GAPDH enzyme activity amenable to high‐throughput drug screening to aid in identifying inhibitory compounds and begin to address selectivity.     

Detection by multiplex polymerase chain reaction and typing of Chlamydia trachomatis isolates

Abstract The multiplex polymerase chain reaction (PCR) was applied for the detection of the Chlamydia trachomatis chromosome and plasmid. The multiplex PCR demonstrated a sensitivity of 0.8 fg of chlamydial DNA, corresponding to the detection of about 5 copies of the plasmid. Analysis of 195 genital specimens collected randomly from a female population, showed that the multiplex PCR is more sensitive and rapid than culturing for detecting Chlamydia trachomatis . Moreover, sequencing of the II variable domain of the ompl gene, directly from DNA of the clinical specimens, appears to be a simple and rapid method for determining serovar isolates.