365例妊娠期妇女TORCH感染的血清学检测及妊娠结局分析

目的了解本地妊娠期妇女TORCH[刚地弓形虫(TOX)、风疹病毒(RV)、巨细胞病毒(CMV)和单纯性疱疹病毒(HSV)]感染检出情况和妊娠结局,为加强孕妇保健、促进优生优育工作提供参考依据。方法选择青田县妇幼保健所2013年1月至2014年12月产科接收的365例孕妇为研究对象,回顾性分析其血清标本中TORCH(TOX、RV、CMV和HSV)的特异性IgM、IgG检测结果,并总结妊娠结局。结果妊娠期妇女TOX、RV、CMV和HSV-IgM阳性率分别为0.82%、1.34%、3.01%和4.38%;IgG阳性率分别为2.74%、57.26%、85.48%和81.64%。TORCH-IgM阳性孕妇出现不良妊娠结局的概率为31.43%,显著高于TORCH-IgM阴性孕妇的1.81%(P0.01)。结论妊娠期妇女TORCH感染是不良妊娠结局的重要危险因素,应加强临床宣传工作和产前筛查,达到优生优育的目的。     

大连地区孕前期及孕早期妇女TORCH检测结果分析

目的通过化学发光分析法对大连市妇幼保健院就诊的2 293例孕前和孕早期妇女TORCH检测结果进行分析,统计得出其感染的阳性率,为本地区育龄期妇女保健提供参考依据,加强TORCH对孕产妇影响的认识,并指导做好预防工作。方法采用化学发光免疫分析法(CLIA)对2 293例孕前期及孕早期妇女进行巨细胞病毒(CMV)、单纯疱疹(HSV)、风疹(RV)、弓形虫(TOX)的IgG以及IgM进行检测。结果 IgG抗体检测结果:TOX阳性率为1.25%,CMV阳性率为95.04%,RV阳性率为84.78%,HSV阳性率为94.31%。IgM抗体检测结果:TOX阳性率为1.39%,CMV阳性率为1.48%,RV阳性率为2.28%,HSV阳性率为10.50%。结论大连地区孕前期及孕早期妇女TORCH的阳性率偏高,TORCH的感染影响人口的质量,与优生优育有着重要的关系,要积极做好检测和预防,及早的干预和治疗。     

1253例孕妇和新生儿TORCH检测结果分析

目的 了解TORCH感染情况,为妇幼保健提供参考依据.方法 采用捕获ELISA方法对1 253例孕妇和新生儿的血清进行TORCH-IgM抗体检测.结果 689例孕妇CMV、TOX、RV及HSVⅡ特异性IgM抗体阳性率分别为1.89％、0.87％、0.44％和0.73％;564例新生儿CMV-IgM、TOX-IgM、RV-IgM和HSVⅡ-IgM阳性率分别为6.91％、0.18％、0和0.35％.结论 检测TORCH特异性抗体对优生优育有重要关系.     

TORCH感染对育龄妇女不孕不育的影响

目的分析单纯疱疹病毒、风疹病毒、巨细胞病毒、弓形虫感染(TORCH感染)对育龄妇女不孕不育以及不良妊娠结局的影响,为优生优育提供参考。方法回顾性分析2015年6月至2017年6月义乌市妇幼保健计划生育服务中心体检者的病例资料,选择女性不孕不育患者300例(不孕不育组)及正常妊娠者616例(对照组)为研究对象,应用ELISA检测各组对象TORCH-IgM,比较两组对象的TORCH感染状况。结果不孕不育组TORCH-IgM总体阳性率为17.0%(51/300),高于对照组的4.55%(28/616),差异有统计学意义(P0.01)。不孕不育组的单一感染与混合感染率分别为12.67%和4.33%,高于对照组的4.06%和0.49%,两组对象单一感染率差异有统计学意义(P0.05)。TORCH感染的孕妇不良妊娠结局比例高于未感染者(51.85%vs 0.74%,χ2=-44.932,P0.01)。结论 TORCH感染可影响育龄妇女的孕育状况,常规开展TORCH检测有利于降低育龄妇女的不孕不育率,对优生优育的开展有重要意义。     

子痫前期发病相关高危因素的Logistic回归分析

目的:采用单因素和多因素Logistic回归方法分析本地区子痫前期发病相关高危因素。方法:选择2014年1月到2017年4月在我院进行分娩的子痫前期产妇78例作为观察组及同期在我院进行分娩的正常产妇78例作为对照组,比较两组产妇的一般情况、婚姻生育史、孕期保健情况、既往史、家族史、本次妊娠情况等。结果:两组产妇的年龄、孕次、产次、初检孕周、产前检查次数等比较差异无统计学意义(P0.05)。观察组子痫前期首次发生的平均孕周为38.26±2.63周。单因素分析显示自然流产史、子痫前期家族史、妊娠高血压、孕前BMI、孕期尿路感染与子痫前期发病明显相关(P0.05);非条件Logistic回归多因素分析结果显示自然流产史、子痫前期家族史、妊娠高血压、孕前BMI为导致子痫前期发病的主要独立危险因素(P0.05)。观察组以剖宫产为主要分娩方式,分娩孕周也明显长于对照组(P0.05);两组产妇都无死亡情况发生,但观察组的产后出血、胎盘早剥、心肝肾功能不全等并发症发生率明显高于对照组(P0.05)。结论:自然流产史、子痫前期家族史、妊娠高血压、孕前BMI为导致子痫前期发病的主要独立危险因素,可导致不良妊娠结局的增加。     

孕中期乳杆菌干预与早产结局的相关分析

目的探讨妊娠中期应用乳杆菌活菌胶囊对早产及先兆早产的预防价值。方法选择石家庄市第四医院2013年门诊产检的妊娠中期的孕妇,筛查出阴道微生态失调1 032例。根据是否接受乳杆菌活菌胶囊治疗分为观察组427例与对照组605例。观察组孕妇睡前温开水冲洗外阴后于阴道后穹窿处放置乳杆菌活菌胶囊1粒,连用10d。10d后行阴道微生态检查,仍异常者再治疗10d。对照组孕妇未进行用药干预治疗。观察并评估观察组孕妇治疗后阴道内乳杆菌阳性率及阴道分泌物清洁度的变化,比较两组孕妇发生早产或先兆早产的情况。结果观察组孕妇治疗后阴道pH(4.04±0.12)较前(4.83±0.09)明显下降(P0.05);乳杆菌阳性率(81.73%)较前(0.00%)明显上升(P0.05)。观察组孕妇先兆早产发生率为5.39%,显著低于对照组的8.93%(χ2=4.985,P0.05);观察组孕妇早产发生率为0.70%,显著低于对照组的2.98%,差异有统计学意义(χ2=5.782,P0.05)。结论妊娠晚期孕妇阴道微生态失调与先兆早产及早产的发生关系密切,乳杆菌活菌胶囊可恢复正常的阴道微生态环境,降低先兆早产及早产的发生率,对预防先兆早产及早产的风险有一定临床价值。     

2020年广州市荔湾区健康人群麻疹、风疹和水痘的IgG抗体水平监测分析

目的了解广州市荔湾区2020年健康人群的麻疹、风疹和水痘IgG抗体水平,为本地制定免疫规划策略提供科学依据。方法采用分层随机抽样方法确定被调查对象,采集血液标本共238份,进行麻疹、风疹和水痘的IgG抗体水平监测并进行分析。结果 ELISA检测血清样本共238份,麻疹、风疹和水痘IgG抗体阳性率分别为97.06%、92.02%和79.41%,抗体几何平均浓度(geometric mean concentration, GMC)分别为1 204.65、43.38和290.38 mIU/mL。男女性别比为1.02∶1,麻疹、风疹和水痘IgG抗体阳性率差异无统计学意义(P0.05)。2～4岁组麻疹IgG阳性率最低,不同年龄组阳性率差异有统计学意义(χ~2=48.158,P0.05);0～1岁组的风疹IgG抗体阳性率最低,不同年龄组抗体阳性率差异有统计学意义(χ~2=36.980,P0.05);0～1岁组水痘IgG抗体阳性率非常低,不同年龄组抗体阳性率差异有统计学意义(χ~2=30.832,P0.05)。接种麻疹疫苗≥2剂次的人群IgG抗体阳性率为95.10%,不同免疫史差异无统计学意义(P=0.448,P0.05);接种风疹疫苗0剂次的人群IgG抗体阳性率最低,不同免疫史差异无统计学意义(P=0.020,P0.05);接种水痘减毒活疫苗0剂次的人群IgG抗体阳性率最低,接种2剂次的阳性率最高,不同免疫史差异有统计学意义(P=0.010,P0.05)。结论本区麻疹、风疹IgG抗体均维持在较高水平并有所提高;水痘IgG抗体水平较低,存在暴发、流行的可能。应加强麻疹、风疹免疫接种和查漏补种工作;有针对性地宣传水痘减毒活疫苗并推广接种;还须积极开展麻疹、风疹和水痘IgG抗体水平监测。     

围生期孕妇支原体感染与产后子宫内膜炎的相关性分析及护理对策

目的探讨围生期孕妇支原体感染与产后子宫内膜炎的相关性及护理对策。方法采用支原体培养法对围生期保健及分娩的孕妇宫颈分泌物进行解脲脲原体(Uu)及人型支原体(Mh)检测,将50例产后子宫内膜炎的产妇作为观察组,另选50例正常的产妇作为对照组。结果观察组Uu的阳性率为28.0%,对照组的阳性率为8.0%,经比较差异有统计学意义(P0.05),观察组Mh的阳性率为12.0%,对照组的阳性率为8.0%,经比较差异无统计学意义(P0.05);观察组中,Uu感染早产发生率或胎膜早破发生率为58.8%,而对照组中均未见早产和胎膜早破现象,两组差异有统计学意义(P0.05);Uu阳性与产后子宫内膜炎的相关系数β=1.565(P0.05),Mh阳性与产后子宫内膜炎无相关性(P0.05)。结论围生期支原体感染与产后子宫内膜炎的发生有一定的相关性;应加强孕妇围生期护理,提高围生期保健质量及产妇的生存质量。     

妊娠合并乙型肝炎患者血脂及雌激素水平检测的临床意义

目的:探讨妊娠合并乙型肝炎患者血脂及雌激素水平检测的临床意义。方法:选择2014年8月到2017年4月我院收治的妊娠合并乙型肝炎孕妇80例作为观察组,同期选择无乙型肝炎的80例孕妇作为对照组,比较两组的血清HDL-C、TC、TG、LDL-C及雌激素水平,对比两组不同妊娠结局血脂和血清雌激素水平,并以妊娠不良结局作为因变量,以收集的资料、血脂及雌激素水平作为自变量,分析妊娠合并乙型肝炎患者妊娠不良结局的危险因素。结果:与对照组相比,观察组血清LDL-C、TC、TG含量均显著升高,而HDL-C含量明显降低(P0.05)。观察组与对照组的血清雌激素含量分别为154.20±10.82 pmol/L和88.14±8.98pmol/L,观察组明显高于对照组(P0.05)。与对照组相比,观察组剖宫产、产后出血、新生儿窒息、胎儿窘迫、妊娠期高血压疾病的发生率均显著增高(P0.05)。观察组和对照组中妊娠不良结局患者的血清TC、TG和LDL-C含量都明显高于妊娠正常结局患者,而HDL-C含量明显低于妊娠正常结局患者。LDL-C、雌激素、年龄、乙肝发病年限为导致妊娠合并乙型肝炎患者妊娠不良结局的危险因素(P0.05)。结论:妊娠合并乙型肝炎患者妊娠不良结局的发生率较高,且伴随有血脂异常与雌激素高表达,二者与妊娠合并乙型肝炎的不良预后相关。     

孕晚期生殖道B族链球菌定植对妊娠结局的影响

目的:分析孕晚期妇女生殖道B族链球菌定植情况,探讨B族链球菌定植对妊娠结局的影响及抗生素治疗效果。方法:选取2018年5月～2019年4月在北京市通州区中西医结合医院妇产科接受产前检查的295例妊娠35～37周的孕妇为研究对象,应用实时荧光定量PCR方法检测其生殖道B族链球菌,将结果呈阴性者纳入阴性组,并依据自愿原则将结果呈阳性的43例孕妇分为阳性A组(28例)和阳性B组(15例),对阳性A组给予抗生素治疗,阳性B组未接受抗生素治疗,观察并比较其妊娠结局。结果:比较不同年龄、产次、流产次数的孕晚期孕妇B族链球菌定植的阳性率,差异无统计学意义(P0.05);阳性A组不良妊娠结局和围生儿不良结局发生率明显低于阳性B组,差异有统计学意义(P0.05);阳性A组不良妊娠结局和围生儿不良结局与阴性组比较,差异有统计学意义(P0.05)。结论:孕晚期生殖道B族链球菌定植会对妊娠结局造成不良影响,应用抗生素治疗可有效改善孕妇妊娠结局。     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.