广州地区轮状病毒血清分型的研究 2.应用微量细胞病变定量读数中和试验对急性病毒性胃肠炎患儿HRV各血清型中和抗体的分析

用微量细胞病变定量读数中和试验,以HRV血清1、2、3、4型的四个标准毒株为抗原,分别检测了1987年广州地区51例健康儿童和30例急性病毒性胃肠炎患儿的急性期及恢复期血清中抗HRV各血清型中和抗体的水平。结果表明30例患儿中的23例,其恢复期血清中的中和抗体比急性期有4倍以上的增长,抗HRV血清4型者占39.1％,抗HRV血清3型占30.4％,抗HRV2型者8.7％,抗HRA1型为17.4％。初步认为1987年广州地区流行的HRV型别以血清型4型为主。     

Rapid Laboratory Diagnosis of an Outbreak of Influenza

The specific diagnosis of an outbreak of acute febrile disease in a sanatorium ward was made rapidly by examining sera from the nine patients for antibodies to a series of likely viruses. All eight convalescent cases had high antibody levels to Influenza A2 (Asian) virus and the case at the acute stage had none. This serological diagnosis provided the first information that influenza was present in the area. Later, Influenza virus Type A2 was grown from the acute case.     

免疫荧光法检测非典型肺炎患者血清抗冠状病毒抗体

目的：检测非典型肺炎患者血清中抗冠状病毒抗体及其滴度变化，协助临床确诊非典型肺炎。方法：间接免疫荧光法检测患者体内急性期和恢复期血清中的抗冠状病毒抗体。结果：3例临床诊断非典型肺炎患者血清内有特异性抗冠状病毒抗体，且恢复期抗体滴度比急性期的滴度增高4倍以上。结论：用具有高度特异性的免疫荧光技术对怀疑感染非典型肺炎的患者进行血清学检测，可协助临床确定诊断。     

SARS-CoV感染康复者血清对豚鼠肺、脾脏功能的影响

目的：为了探讨SARS—CoV感染患者急性病理损伤的免疫反应机制。方法：应用SARS—CoV感染康复者血清24h内多次注射豚鼠体内，观察肺脏损伤及血液气体变化。结果：动物在第3次注射康复者血清后出现急性严重呼吸困难，血氧明显降低、二氧化碳明显升高，肺组织病理显示肺组织大量炎细胞浸润，脾组织白髓淋巴细胞减少，而用正常人血清注射动物后未出现类似变化。结论：给豚鼠多次注射SARS—CoV感染康复者血清可导致急性肺损伤。     

SARS冠状病毒N蛋白在免疫荧光诊断技术中的应用

目的 应用基因工程技术,在昆虫细胞中表达SARS—CoV N基因,产生无感染性的核蛋白,作为诊断抗原,用于检测血清中SAILS特异性抗体。方法 从一例输入性SARS病人血清中提取病毒RNA,通过RT-PCR方法扩增SAILS—CoV N基因,将它插入昆虫杆状病毒,构建重组昆虫杆状病毒,转染sf 9昆虫细胞,经丙酮固定,制成SARS特异性诊断抗原,建立检测病人血清抗SARS-CoV抗体的免疫荧光试验(immunofluorescence assay,IFA)。结果 此抗原仅与SARS阳性病人血清起反应,而与正常人及其他发热病人血清不起反应。经双盲试验,与空斑减少中和试验(plaque reduction neutralization test,PRNT)阳性的2003年SAILS病人血清的符合率为97．8％;检测2004年广东新发4例SAILS病人进展期血清均阳性,发病后第6天即可检出抗体1：40阳性,至第9天,升至1：640.结论 此法用于检测病人血清中SARS抗体,具有特异性强、敏感性高,试剂制备简单、安全,不需P3实验室,为诊断与研究SAILS提供新的途径和手段。     

2019冠状病毒病康复者特异性IgG 抗体效价的影响因素及变化趋势

目的： 探讨2019 冠状病毒病(coronavirus disease 2019,COVID-19)康复者严重急性呼吸综合征冠状病毒 2(severe acute respiratory syndrome coronavirus 2,SARS-CoV-2)特异性IgG 抗体的影响因素及效价变化趋势,为康复 者恢复期血浆临床治疗的可行性提供理论依据。方法： 采用胶体金免疫层析法检测2020 年2 月19 日至4 月6 日期间 随诊的113 例COVID-19 康复者SARS-CoV-2 特异性IgG 抗体及其效价,分析高效价组(抗体效价≥1?160)与低效价组 (抗体效价<1?160)病例的基本特征及治疗因素差异;连续监测高效价组特异性IgG 抗体效价,分析效价变化趋势。 结果： 高效价组与低效价组患者年龄、ABO血型分布、COVID-19 临床分型、发病时间、入院后首次C-反应蛋白、 淋巴细胞绝对值、CD19+CD3-淋巴细胞绝对值及病程中是否接受糖皮质激素治疗差异均无统计学意义(均P>0.05),高 效价组男性占比高于低效价组(P<0.05);高效价组SARS-CoV-2 特异性IgG 抗体效价在患者出院28 d 后全部下降至1? 160 以下。结论： 男性COVID-19 患者较女性患者可能更容易产生高效价SARS-CoV-2 特异性IgG 抗体。康复者 SARS-CoV-2特异性IgG抗体效价峰值维持时间较短,用于临床治疗的康复者血浆应在患者康复出院后28 d内采集。     

SEROEPIDEMIOLOGIC STUDY OF EPIDEMIC HEMORRHAGIC FEVER WITH RENAL SYNDROME IN CHINA

Sera from 193 cases of epidemic hemorrhagic fever renal syndrome (EHFRS) and 173 normal persons and patients with other diseases in endemic and nonendemic areas were examined for immunofluorescent (IF) antibodies to Korean hemorrhagic fever (KHF) antigen by indirect immunofluorescent antibody (lFA) test. 76 0f 78 (97.4470) paired sera from EHFRS patients were KHF' antibody positive in l or both samples. Of 109 acute stage sera samples 81 (74.31To) were KHF IgM antibody positive whereas of 162 con- valescent sera samples 156 (96.2970) were KHF IgG antibody positive, indicating that the EHFRS agent is immunologically related, if not identical with KHF. The earliest date of IF IgM antibody ap- pearance was l day after onset of illness a.nd IF IgG antibodies could be found in the patient convalescent serum 16 years after the acute at- tack. There was no immunologic relationship between the EHFRS agent and Japanese B en- cephalitis (JBE) or influenza A3 viruses.     

抗心肌球蛋白抗体在风心病患儿血清中的变化

目的 :为探讨儿童风湿性心脏病 (RHD)患者血清抗心肌球蛋白抗体 (ACMA)的变化及意义。方法 :采用酶联免疫吸附法 (ELISA)检测 2 7例RHD活动期、30例静止期患儿及 32例健康儿童的血清ACMA。结果 :活动期组阳性率 81.5 % (2 2 /2 7) ;静止期组及正常对照组阳性率分别为 16 .7% (5 /30 )和 3.1% (1/32 )。活动期组阳性率显著高于静止期组及正常对照组 (P <0 .0 1)。静止期组与正常对照组无显著差异 (0 .0 5

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Interpretation of microscopic agglutination test for leptospirosis diagnosis and seroprevalence

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不同病期脑梗塞患者血清LPO和SOD含量变化及相关性探讨

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SPA-ELISA检测棕果蝠血清冠状病毒抗体的研究

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Serological Response of the EBV Antibodies in Pediatric Cases of Infectious Mononucleosis and in Their Contacts

The EBV antibodies were measured in 378 sera from a group of 129 pediatric and older cases of infectious mononucleosis and from 117 family and social contacts. Cases of infectious mononucleosis with only one exception were EBV seropositive in acute and/or convalescent sera. Fourteen cases, however, from whom no convalescent serum was available were EBV seronegative. A rise in EBV antibodies of two dilutions or more was demonstrated in 15 of the 129 cases. The prevalence of these antibodies in contacts reached 50 to 70% in each of four age groups. A significant antibody rise was encountered in only four cases, one of whom was found to have infectious mononucleosis simultaneously with the index case and one after an interdisease period of 10 months. The infectivity of the EB virus (and of infectious mononucleosis if causally related) and its horizontal transmission seem to be as low in nature as they appear to be experimentally in the laboratory.     

The indirect hemagglutination test for the detection of antibodies in cattle naturally infected mycoplasmas.

Stable mycoplasma antigens for the indirect hemagglutination test (IHA) were prepared employing glutaraldehyde treated sheep erythrocytes sensitized with Mycoplasma agalactiae subsp. bovis and Mycoplasma bovigenitalium antigens. Employing these antigens mycoplasma antibodies were detected in sera from cattle which had mastitic symptoms due to natural infection with either M. agalactiae subsp. bovis or M. bovigenitalium. A total of 200 cows from four herds were examined at varying intervals for the presence of M. agalactiae subsp. bovis and for the detection of antibody using growth inhibition and IHA tests. Mycoplasmas were isolated from 37 animals. Growth inhibiting antibody was detected from 56 of the 200 animals. In the IHA tests, antibody titer greater than or equal to 1:80 were detected in 148 animals, 76 of these having antibody titers greater than or equal to 1:160, while sera of 116 normal control animals had no growth inhibiting antibody and none had IHA antibody titers greater than 1:40. M. bovigenitalium was isolated from the milk of three of 26 animals in a fifth herd during an outbreak of mastitis. Growth inhibiting antibodies were demonstrated in the sera of ten of the 26 animals. However, the IHA test detected antibody titers of greater than or equal to 1:160 in 13 animals and of 1:80 in one of the 26 animals. To determine the specificity of the IHA tests, M. agalactiae subsp. bovis and M. bovigenitalium antigens were reacted with rabbit hyperimmune typing sera produced against 12 species of bovine mycoplasmatales. Homologous antisera showed IHA antibody titers of 1:1280 and 1:2560 against M. agalactiae subsp. bovis and M. bovigenitalium respectively, whereas heterologous antisera showed IHA antibody titers of less than or equal to 1:20. Also eight type-specific bovine antisera were reacted with M agalactiae subsp. bovis and M. bovigenitalium antigens in homologous and heterologous tests. Homoogous reactions showed IHA antibody titers greater than or equal to 1:320, whereas heterologous reactions showed IHA titers of less than or equal to 1:20. This IHA test promises to be useful for the detection of bovine mycoplasma antibodies in sera from cattle infected with M. agalactiae subsp. bovis or M. bovigenitalium. Thes test is sensitive, reproducible and specific and the technique is relatively simple and rapid. The antigens were stable for at least seven months.     

抗鼠T淋巴细胞血清的制备

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26例甲型肝炎患者血清以二巯基乙醇处理,比较处理前后的补体结合反应滴度,以检测甲型肝炎IgM抗体。处理后滴度下降4倍或4倍以上者14例,阳性率为53％。9例双(三)份血清中有2例甲型肝炎IgM抗体可持续存在一年左右。对上述14例血清作酶联免疫吸附测定,结果不论急性期或恢复期血清甲型肝炎IgM和IgG抗体均为阳性,未能达到鉴别早期病人的目的。本文对其原因作了讨论。     

Sensitivity and specificity of an enzyme-linked immunosorbent assay for the detection of infectious bovine rhinotracheitis viral antibody in cattle

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