马来丝虫微丝蚴表面抗原的单克隆抗体减轻感染沙鼠的微丝蚴血症

作者用单克隆技术研制了马来丝虫微丝蚴表面抗原的单克隆抗体MF—1,并研究和分析了MF—1的特性和作用。以埃及伊蚊叮咬感染了马来丝虫的沙鼠后12—14天,将蚊杀死,取得感染性蚴(L(?))     

粤东地区班氏微丝蚴周期性观察

本文报告粤东地区11例班氏微丝蚴的周期性,每2小时血检一次观察,结果白天检出微丝蚴3.07%,夜间检出96.93%,周期性指数为109.06%,微丝蚴密度高峰时间为零时57分。结果表明粤东地区为夜现周期型班氏丝虫流行区,认为普查丝虫病以夜间9时至凌晨3时血检为宜。     

微丝蚴周期性曲线统计分析方法的改进

微丝蚴周期性的统计分析,无论在理论与实践上都有重要意义,因为这与采血时间、诊断治疗、种型鉴定、丝虫生理,甚至中间宿主活动规律的研究等,都有很大关系。Sasa 和Tanaka 最早使用统计学知识,以数理方程来     

对微丝蚴周期性资料的再分析

在《微丝蚴周期性曲线统计分析方法的改进》一文中,是用可编程序计算器按圆形分布处理的。考虑这种计算器未必很普及,又文中未附程序与计算方法,想借鉴者或有困难。又文中所引 Tanaka 等公式:Y=100+1.347Dcos(h-k)°,式中100未说明它的意义;又此式中的 K 既然不是一个常数,可能随虫种、D 等而异,需要根据实际资料确定,式中“1.347”未说明有何意义,末必是个不变常数。即该式未必是确定微丝蚴周期性曲线的通式。     

广东省丝虫病监测残存微丝蚴血症者分析

1988年至1990年有计划对广东省开展丝虫病的监测工作,64个市县横向监测,共血检474081人,人群微丝蚴率为0.19％。有54.55％(162/297)的乡未发现微丝蚴血症者。9个纵向监测县1988年、1990年分别血检17815人和15359人,微丝蚴率为0.12％(21/17815)和0.10％(15/15359),只有4个县发现微丝蚴血症者,1～9岁儿童未发现感染者;致倦库蚊自然感染率自1988年的0.07％(10/13640)降至1990年的0.03％95/15041),中华按蚊解剖三年均未检获阳性蚊。在监测工作中检获的残存微丝蚴血症者941例,对其中658例进行分析,有87.69％(557/658)系原血检阳性或以往未血检或外地迁入者,年龄均在5岁以上。沿海地区微丝蚴率较内地高(P<0.01),这提示还存在一定薄弱环节;须加强巩固扫尾工作。     

班氏丝虫微丝蚴的体外培养和发育

许多研究人员试图在体外培养微丝蚴,观察各种丝虫的发育阶段。Sawyer和Weinstein报道将犬恶丝虫微丝蚴成功地培育到腊肠期。Kharat等报道在含添加剂的Tc-199培养基内,斑氏丝虫微丝蚴可发育到腊肠期。Mak等人报道马来丝虫和彭亨丝虫的感染期幼虫在体外可培养到第四期和童虫期,并发现脱鞘是体外发育过程的必要条件。本文为研究含添加剂的各种培养基对体外斑氏丝虫微丝蚴培养和发育的影响。     

马来丝虫卵壳的超微结构及其与微丝蚴鞘的比较

从实验感染的沙鼠腹腔内取得马来丝虫虫卵和微丝蚴,经固定、脱水、包埋、切片、染色后,在Philips 400T显微镜下检查。高倍下检查虫卵可清楚见到一层膜,在其表面具有微细电子密集阴影。逐步增大倍数,可见卵壳有二种结构:均匀的基膜和在其上有明显的电子密集阴影。电子密集阴影复盖着卵壳的整个表面,大小形状不一,一般基底宽,远侧变狭,最长为70nm。     

永嘉县应用快速免疫色谱测试卡检测微丝蚴

为了证实浙江省全面消灭丝虫病 ,没有残存微丝蚴的存在 ,省地方病防治所引进目前对微丝蚴抗原特异性强、敏感性高的澳大利亚快速免疫色谱测试卡 (简称澳卡 )。永嘉县在浙江省地方病防治所有关专家的支持下 ,于 1998年下半年对 1983年人群血检微丝蚴阳性的 5 4人 (其中 1人是1992年永嘉县最后 1例血检微丝蚴阳性者 )和在校 8～ 14岁小学生 10 0人进行了现场测试。对象与方法1　对象　 (1)原微丝蚴阳性者 ;(2 )原丝虫病流行区在校小学生。2　方法　统一使用澳大利亚进口的快速免疫色谱测试卡。澳卡保存在 4℃的冰箱 ,使用时打开澳卡 ,采集指尖…     

残存微丝蚴血症动态变化与蚊媒关系观察

目的：了解残存微丝蚴血症者在自然条件下的动态变化，为消灭丝虫病提供依据。方法：于1994－2001年按丝虫病常规采血检查。捕蚊管吸捕人房致倦库蚊并解剖镜检。结果：人群微丝蚴率1994年为0．57％，2001年0．39％；血微丝蚴密度逐年下降，而1999年2例复阳，2001年1例阴性，1例密度14条。8年捕获致倦库蚊3098只，阳性蚊12只，蚊体内幼丝虫43条。结论：8年连续观察，残存班氏微丝蚴血症在自然条件下，微丝蚴密度可逐渐降低直至转阴，滋生新的传染源机会极小。     

医保住院病人自付比例分析

目的:分析医保住院病人的自付比例及其影响因素.方法:收集广州市112家医院70 792例医保住院病人的住院费用及有关信息.结果:不同级别医院医保病人个人自付比例存在差异;在职职工住院费用中的自付比例偏高,自付比例平均为50.99%(中位数为57.10%);自付比例与平均住院费用之间的秩相关系数为-0.73(P＜0.01),随着自付比例的增加,其相应的次均住院费用总体上呈下降趋势.结论:必须加强费用控制,减轻在职职工医保住院病人的自付比例;自付比例受多方面因素的影响,必须辩证看待;使用自付比例的中位数能较好反应真实水平.     

Percentage and verbal category measures of risk likelihood

Perceptions of personal risk (i.e. risk likelihood) occupy acentral role in theories of individual health behavior. Thereis no agreement, however, concerning the best approach for measuringthese perceptions. We compared a percentage scale with a seven-point,verbally labeled scale. Data from college student subjects (N= 215) showed that the correlations between risk factors andrisk likelihood judgements for seven health problems were nostronger with one scale than the other. Suggestions for whento use each scale are given.     

不规则射野的百分深度剂量计算

目的探讨一种快捷、准确地计算不规则野的百分深度剂量的方法。方法分别采用A、B、C、D 4种方法计算不规则射野特定深度的百分深度剂量,由此得到的处方剂量与实测剂量进行比较。结果 A方法平均误差为3.67%,B方法平均误差为0.47%,C方法对规则挡块射野平均误差为0.24%,对不规则挡块射野的平均误差为0.69%,D方法平均误差为0.28%。结论 B方法在不规则照射野的百分深度剂量计算中,误差平均为0.47%,误差范围在±1%以内,精确程度符合要求,便于标准化操作。     

Percentage body fat and prevalence of obesity in a UK offshore population

1. Body-weight, body height and skinfold measurements were taken in 419 adult males working in the UK offshore oil industry. Percentage body fat was estimated from skinfold thicknesses and the Quetelet index (weight:height) determined. 2. The prevalence of overweightness, assessed from the Quetelet index, in the age groups 20-29, 30-39 and 40-49 years was 31.6, 50.0 and 66.2% respectively. The Office of Population Census and Surveys (1981) showed that for age-matched groups, the incidence of overweightness in an onshore population was 26, 40 and 50% respectively. 3. The percentage body fat for each respective age group was greater than that reported for an age-matched onshore population. 4. The Quetelet index was significantly related to body fat (r 0.765, P less than 0.0001) and poorly correlated with height, thus this weight:height relation may be utilized in the assessment of overweightness in offshore personnel. 5. In conclusion it appears that the offshore population had a higher percentage body fat than their onshore peers and that the prevalence of overweightness was also greater.     

基于Newton插值法的X线百分深度剂量和深度关系研究

目的：应用Newton插值法拟合百分深度剂量PDD和深度的函数关系。方法：分析不同厂家直线加速器测量的PDD数据，计算同一深度PDD的平均值，分割区间，选取插值节点，拟合PDD和深度（h）的3次多项式。结果：Newton插值法拟合公式所得计算的值和测量值百分误差的平均值小于1％。结论：公式计算值可以用于临床常规放射治疗和理论研究工作。     

孕期体脂百分比对妊娠期妇女糖尿病影响因素分析

目的探索孕中期妇女体成分与妊娠期糖尿病(GDM)的关联。方法采用病例对照研究,以2018年4月至2019年4月在北京市某妇幼保健院进行产检孕妇为研究对象,在妊娠24~28周进行口服糖耐量试验,以明确是否存在GDM,并使用人体成分分析仪测定孕妇体成分。最终获得124例诊断GDM的孕妇作为病例组,130例血糖正常孕妇作为对照组。利用独立样本t检验及Logistic回归分析探索孕中期GDM发生的可能相关因素。结果病例组体脂肪百分比高于对照组(P<0.05),细胞内、外水分百分比及无机盐百分比低于对照组(P<0.05),体脂百分比为孕中期GDM发生的危险因素(OR=1.1,95%CI=1.1~1.2),其余体成分指标均为GDM发生的保护因素,分别为去脂体重百分比(OR=0.9,95%CI=0.8~0.9)、肌肉量百分比(OR=0.9,95%CI=0.8~0.9)、无机盐百分比(OR=0.2,95%CI=0.1~0.4)、蛋白质百分比(OR=0.5,95%CI=0.4~0.7)、细胞外水分百分比(OR=0.7,95%CI=0.6~0.8)、细胞内水分百分比(OR=0.8,95%CI=0.7~0.9)。结论体脂百分比过高是孕中期GDM发生的危险因素,为体成分作为GDM干预指标提供一定理论依据,孕期应合理控制体重预防GDM发生。     

Percentage fat in overweight and obese children: comparison of DXA and air displacement plethysmography

OBJECTIVE: To compare percentage body fat (percentage fat) estimates from DXA and air displacement plethysmography (ADP) in overweight and obese children. RESEARCH METHODS AND PROCEDURES: Sixty-nine children (49 boys and 20 girls) 14.0+/-1.65 years of age, with a BMI of 31.3+/-5.6 kg/m2 and a percentage fat (DXA) of 42.5+/-8.4%, participated in the study. ADP body fat content was estimated from body density (Db) using equations devised by Siri (ADP(Siri)) and Lohman (ADP(Loh)). RESULTS: ADP estimates of percentage fat were highly correlated with those of DXA in both male and female subjects (r=0.90 to 0.93, all p<0.001; standard error of estimate=2.50% to 3.39%). Compared with DXA estimates, ADP(Siri) and ADP(Loh) produced significantly (p<0.01) lower estimates of mean body fat content in boys (-2.85% and -4.64%, respectively) and girls (-2.95% and -5.15%, respectively). Agreement between ADP and DXA methods was further examined using the total error and methods of Bland and Altman. Total error ranged from 4.46% to 6.38% in both male and female subjects. The 95% limits of agreement were relatively similar for all percentage fat estimates, ranging from +/-6.73% to +/-7.94%. DISCUSSION: In this study, conversion of Db using the Siri equation led to mean percentage fat estimates that agreed better with those determined by DXA compared with the Lohman equations. However, relatively high limits of agreement using either equation resulted in percentage fat estimates that were not interchangeable with percentage fat determined by DXA.     

Percentage of lifetime spent in area of residence at time of death.

A nationwide study by random-digit-dialing telephone interviews was used to estimate f, the average percentage of people's lifetimes, f, spent within 25 miles of their residence at time of death. The result is f approximately 70%, much larger than expected from census data on migration. Except for deaths in Florida, California, and Arizona, f greater than 50% in all areas of the United States. For over half the U.S. population, f greater than 90%.