BMJ研究新闻:孕期寨卡病毒感染的时期不同其后代小头畸形的发病率不同

2016-06-01 MedSci MedSci原创

据CDC的研究人员报道,怀孕前3个月感染寨卡病毒与其后代小头畸形的发病率为1-13%有关,而怀孕中间三个月和怀孕后期三个月感染寨卡病毒所致小头畸形的发病风险可忽略不计。该研究数据来自于巴西东北部的巴伊亚州,寨卡病毒曾在此爆发过。研究人员估计,孕期前三个月寨卡病毒感染所致的小头畸形发生风险从0.88%(假设80%和100%小头畸形病例过度报道的孕妇中总的寨卡病毒感染率;95% CI为0.80%-0.

据CDC的研究人员报道,怀孕前3个月感染寨卡病毒与其后代小头畸形的发病率为1-13%有关,而怀孕中间三个月和怀孕后期三个月感染寨卡病毒所致小头畸形的发病风险可忽略不计。

该研究数据来自于巴西东北部的巴伊亚州,寨卡病毒曾在此爆发过。研究人员估计,孕期前三个月寨卡病毒感染所致的小头畸形发生风险从0.88%(假设80%和100%小头畸形病例过度报道的孕妇中总的寨卡病毒感染率;95% CI为0.80%-0.97%)到13.2%(如果总体感染率仅为10%,且没有过度报告;95% CI为12%-14.4%)。在此过程中研究人员也考虑了基线时期小头畸形率的不确定性(0.2-1.2%)。

该研究的领导者Michael Johansson,来自CDC虫媒传染病研究所,说道,“我们发现小头畸形的发生风险与孕妇前三个月寨卡病毒感染之间具有很强的关联,而与孕期中间三个月和后期三个月的感染之间的关联则是微不足道的。”然而,他们发现孕妇前三个月寨卡病毒感染所致的风险值的范围很大,这主要是由于研究数据仅限于巴伊亚和其他受影响地区,这些地区寨卡病毒的感染率是未知的,且小头畸形的病例仍在报告和评估中。

研究人员警告道,对轻微或无症状的病毒感染的影响还知之甚少,而这种感染比较常见因而大大增加了疾病的总负担。此外,小头畸形也可能是先天性病毒综合征的一个表现。

最后,研究人员得出结论,“如果感染与不良后果风险的风险与寨卡病毒既往感染过的区域相似,那么可能会出现更多小头畸形的病例和其他的不良结果。越来越多的证据表明,应采取预防措施以避免孕期寨卡病毒的感染,且卫生保健系统应为未来几年越来越多不良妊娠结局所造成的医疗负担做准备。”

原始出处:

Michael McCarthy. Microcephaly risk with Zika infection is 1-13% in first trimester, study shows. BMJ 2016; 353 doi: http://dx.doi.org/10.1136/bmj.i3048.


Johansson MA, Mier-Y-Teran-Romero L, Reefhuis J, Gilboa SM, Hills SL. Zika and the risk of microcephaly. N Engl J Med2016. doi:10.1056/NEJMp1605367. pmid:27222919.

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    2016-10-31 gaoxiaoe
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    2016-06-03 吴教授

    尽快攻克吧

    0

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    2016-06-03 wushaoling
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