Infect Dis:马来西亚南部农村社区健康成人登革热血清阳性率如何?

2018-04-25 MedSci MedSci原创

<p class="MsoNormal" style="margin-bottom:0cm;margin-bottom:.0001pt;text-align: justify;text-justify:inter-ideograph;line-height:normal">马来西亚登革热疫情的频率和规模呈指数级持续增长,流行的年龄范围逐渐转向成年人,并不断扩张到农村地区。然而,关于登革热病毒<s

马来西亚登革热疫情的频率和规模呈指数级持续增长,流行的年龄范围逐渐转向成年人,并不断扩张到农村地区。然而,关于登革热病毒(DENV)在农村地区传播程度的信息仍然是缺乏的。本研究在马来西亚南部的一个农村地区,开展了以社区为基础的试点研究以建立健康成年人的DENV血清流行率,并确定影响因素。

本研究在20154月至5月开展期间,共纳入Segamat地区Sungai Segamat 亚区的三个地区的家庭中的277名成年参与者。通过血清检测免疫球蛋白G(免疫球蛋白)(Panbio®登革热间接免疫球蛋白ELISA / high-titer capture)和免疫球蛋白M(IgM)(Panbio®)抗体。对IgG-阳性血清随机样本进行血小板减少中和试验以进一步确认结果。通过访谈收集病史,并回顾了以往的登革热病史,并从现有的数据库中获取社会人口信息。

总的DENV血清阳性率为86.6%(240/277)(95% CI:83 - 91%)。在11.2%(31 / 277)的参与者中发现新近感染(IgM /high-titer capture IgG)的血清学证据,而在75.4%(209 / 277)的参与者中存在既往感染的证据(间接IgG减去新近感染)PRNT检测显示检测到的抗体确实是DENV特异性的。多变量分析显示,年纪较大的人群与既往DENV感染显著相关。血清阳性随着年龄的增加而增加。在小于25岁年龄组为 48.5% 在大于45岁年龄组中为85%以上(P < 0.001)。在单变量分析中,没有发现与职业、研究地点、住房类型、共患病、教育水平和婚姻状况的关联性,尽管后两者在单变量分析中具有统计学意义。在多变量分析中,没有一个研究因素与新近DENV感染有显著的相关性,尽管最近爆发的两个点在主要由中国人居住的研究地点。大多数感染没有导致可识别的疾病(无症状或非特异性症状),只有12.9%的参与者(31 / 240)能够回忆起在过去曾感染过登革热。

在研究中主要的农村社区此前对登革热的暴露程度很高。研究发现未报告病例的比例较高可能是由于亚临床感染所导致的,这表明需要加强监测和控制方法。这一发现也对测量疾病负担、了解传播动力学、以及对DENV疫苗功效的假设作用有重要的意义。

原始出处:

Amreeta Dhanoa, Sharifah Syed Hassan, Nowrozy Kamar Jahan,Seroprevalence of dengue among healthy adults in a rural community in Southern Malaysia: A pilot study.

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    2018-04-27 daviiliu
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