VB环境下刚地弓形虫多媒体课件的开发

目的 利用Visual Basic(VB）开发刚地弓形虫多媒体教学课件，探索VB环境下课件开发技术。方法 依据本科教学大纲的要求收集相关文本、图像、影音资料，撰写软件脚本。将所收集资料数据化并予以加工。在Windows98和B5.0(SP3）环境下进行软件的设计、编译与调试。结果 开发出了一套集文本、图像、动画、音频、视频于一体、符合教学需要的交互式多媒体课件。结论 VB可较好地应用于人体寄生虫学等基础医学课程多媒体课件的开发。     

Isolation and characterization of a monoclonal anti-P30 antibody resistant mutant of Toxoplasma gondii

Of the possible iodine-labelled Toxoplasma gondii surface proteins, P30 (apparent Mr 30,000) is the principal one recognized by acute and convalescent anti-toxoplasma sera. This protein which comprises from 3 to 5% of the total parasite protein was used to raise a panel of parasiticidal monoclonal anti-P30 antibodies. One of these monoclonal antibodies was able to select a resistant mutant from a large population of chemically mutagenized wild-type P strain parasites. This mutant retained the wild type sensitivity to other non-P30 parasiticidal monoclonal antibodies as well as polyclonal anti-P30 rabbit sera. Analysis of surface radioiodinated wild type and mutant parasites showed that the mutant had a quantitative reduction in the amount of P30. A comparison of surface biotin labelled wild type and resistant parasites by two dimensional electrophoresis showed that the mutant lacked one and possibly two of several proteins that make up wild type P30. Western blot analysis indicated that the mutant was devoid of antigenically reactive P30. These findings further support the hypothesis that antigenic variants of T. gondii can be induced and may involve the major surface membrane antigens of the parasite.     

孕妇弓形虫感染与垂直传播的研究

目的 :探讨孕妇弓形虫感染对胎儿的影响。方法 :采用酶免三联诊断法对 35 6例母婴配对标本进行血清学检测。结果 :产妇弓形虫感染率平均为 19 1% ,各单项检测分别为循环抗原 (CAg) 15 2 %、IgM2 5 %、IgG3 4% ;新生儿弓形虫感染率平均为 17 7% ,其脐血各单项检测分别为CAg16 9%、IgM0 3%、IgG2 2 %。CAg垂直传播率为 35 2 % ( 19/5 4)。 4例畸胎儿中 1例脐血弓形虫CAg阳性。结论 :孕妇感染弓形虫可通过胎盘垂直感染胎儿 ,应引起围产医务工作者的高度重视 ,加强对弓形虫感染的早期诊断和及时治疗     

小儿脑瘫与弓形虫感染关系的研究

目的 探讨海南小儿不明原因脑瘫与弓形虫感染的关系,为诊治小儿脑瘫提供依据,方法 以住院确诊不明原因脑瘫患儿为研究组,体检正常的小儿为对照组,比较两组弓形虫抗体ＩｇＧ和ＩｇＭ、循环抗原（ＣＡｇ）、ＤＮＡ的四项检测,分析弓形虫感染与脑瘫的关系。结果 研究组检测 ７９例脑瘫患儿中,弓形虫阳性３３例,感染率为４１．８％,对照组检测２６９例中,弓形虫阳性２３例,感染率为８．６％,两组对比差别非常显著（Ｐ＜０．００１）。结论 弓形虫感染是海南不明原因脑瘫患儿的主要原因之一,对于孕妇、新生儿和婴幼儿的弓形虫感染检测,是防治脑瘫发生的手段之一。     

Azathioprine-induced toxoplasma gondii infection in a patient with Crohn's disease with NUDT15 variation: A case report

Introduction:Azathioprine (AZA) has been widely used for the treatment of various immune-related diseases and has become a mainstay in the treatment of inflammatory bowel disease. However, patients with genetic mutations may experience severe adverse events when treated with azathioprine. Most of the previous literature focused on the TPMP gene-related adverse reactions, herein, we report a case of Crohn''s disease patient with nucleoside diphosphate-linked moiety X motif 15 gene (NUDT15) variation and wild-type TPMP gene who developed toxoplasma gondii infection after azathioprine treatment.Patient concerns:A 56-year-old Crohn''s disease patient developed toxoplasma gondii infection within 2 months after the administration of azathioprine; however, he had no relevant high-risk factors.Diagnosis:Subsequent genetic testing revealed that the patient was heterozygous for NUDT15. Therefore, it was reasonable to consider that the patient''s genetic mutation resulted in reduced tolerance to azathioprine, leading to low immunity and eventually toxoplasma infection.Interventions:AZA was then discontinued; after anti-infection, antipyretic and other supportive treatments were administered, the patient''s condition gradually improved.Outcomes:The patient was followed up at 1, 3, and 6 months after discharge; fortunately, he was in good health.Conclusion:We report a case of Crohn''s disease in a patient who developed severe pneumonia caused by toxoplasma gondii infection due to the administration of AZA, with normal TPMP gene but NUDT15 gene mutation. This indicates that NUDT15 variation may contribute to severe adverse events in patients treated with azathioprine, and we suggest that NUDT15 genotype be detected before the use of azathioprine in order to provide personalized therapy and reduce side effects.     

Saliva as a source of anti-Toxoplasma gondii IgG for enzyme immunoassay in human samples

Toxoplasmosis, a highly prevalent disease, is mainly diagnosed by serology. Incidence studies could be feasible in children, but ethical concerns restrict blood sampling in this group. Saliva contains small amounts of crevicular fluid IgG. Dot-ELISA and a protein A IgG capture immunoassay were standardized for anti-Toxoplasma gondii IgG in paired saliva and serum samples from 20 adult volunteers. A frequency of toxoplasmosis of 19% (95% CI 12–28) was found in 100 saliva samples from university graduates using both assays. Toxoplasmosis immunoassays using saliva IgG are a promising tool for the investigation of the epidemiology of this disease in children and other vulnerable groups.     

普洱地区13774例育龄女性TORCH筛查及IgG抗体亲和力检查结果分析

目的探讨普洱地区育龄女性TORCH感染情况及流行特点,为该地区育龄女性孕期保健提供一定的参考依据。方法收集2017年3月至2019年3月来该院进行TORCH检查的育龄女性13774例,通过磁微粒发光化学免疫分析法定量检测TORCH特异性IgG和IgM抗体,依据检测结果,按受检女性的年龄段和不同季节分别统计弓形虫(TOX)、风疹病毒(RV)、巨细胞病毒(CMV)、单纯疱疹病毒(HSV)-Ⅰ、HSV-Ⅱ的IgG和IgM抗体阳性情况。分析IgG抗体亲和力结果。结果(1)TORCH-IgG抗体检测结果中,CMV-IgG抗体阳性率最高,为92.62%,TOX-IgG抗体阳性率最低,为6.33%;TORCH-IgM抗体检测结果中,CMV-IgM抗体阳性率最高,为0.86%,TOX-IgM抗体阳性率最低,为0.30%。(2)成年人TORCH-IgG抗体(除TOX)和TORCH-IgM抗体阳性率均高于未成年人(P<0.05)。(3)不同季节TORCH-IgM抗体阳性构成比差异均无统计学意义(P>0.05)。(4)TORCH-IgG抗体亲和力检测结果以高亲和力为主。结论育龄女性常规进行TORCH筛查及IgG抗体亲和力的检查,一方面可有针对性地预防TORCH感染,另一方面可为临床鉴别TORCH急性感染提供诊断依据。     

重组抗原金标免疫渗滤法检测弓形虫感染的研究

目的:建立一种快速、简便的弓形虫病诊断方法。方法:将弓形虫P30重组抗原包被于硝酸纤维膜上,以金标免疫渗滤法(DIGFA)检测兔血清中相应抗体,呈现红色斑点者为阳性。结果:检测弓形虫感染兔血清41份,阳性率为97.56%(40/41),检测正常兔血清20份,感染囊虫兔血清26份,感染血吸虫兔血清40份,感染丝虫兔血清21份,感染肺吸虫兔血清33份,仅2份血吸虫感染兔血清出现交叉反应。结论:弓形虫P30重组抗原金标免疫渗滤法检测弓形虫感染兔有较高的敏感性和特异性。     

输卵管妊娠与人巨细胞病毒、弓形虫感染的相关性研究

目的　研究人巨细胞病毒、弓形虫感染与输卵管妊娠的相关性。方法　采用酶联免疫吸附测定 (ELISA)方法和聚合酶链反应 (PCR)技术检测输卵管妊娠患者与对照组血清人巨细胞病毒 (HCMV)和弓形虫 (TOXO)抗体以及生殖道HCMV和TOXODNA。结果　病例组血清HCMVIgG抗体阳性检出率为 31 9% ,明显高于对照组15 8% (P <0 0 5 ) ;HCMVIgM抗体、TOXOIgG、IgM抗体检出率均高于对照组 ,在统计学上无明显差异 (P >0 0 5 ) ;病例组宫颈、宫腔及输卵管组织中均分离到HCMVDNA和TOXODNA ,且宫颈HCMVDNA阳性检出率为14 3% ,明显高于对照组 (P <0 0 5 )。结论　输卵管妊娠与HCMV感染有关 ,TOXO感染为输卵管妊娠的可疑因素。