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科学美国人：Zika Linked to Variety of Birth Defects
60秒科学节目（SSS）是科学美国人网站的一套广播栏目，英文名称：Scientific American - 60 Second Science,节目内容以科学报道为主，节目仅一分钟的时间，主要对当今的科学技术新发展作以简明、通俗的介绍，对于科学的发展如何影响人们的生活环境、健康状况及科学技术，提供了大量简明易懂的阐释。
Zika virus infection during pregnancy has been linked to the abnormal brain development called microcephaly. Now a study finds more evidence for the connection.
Researchers at the CDC in the U.S. and the National Health Institute in Colombia found that the number of babies born with microcephaly in Colombia increased more than four-fold during a nine-and-a-half-month span in 2016 compared with the same span in 2015.
“And the peak of Zika virus outbreak in pregnant women was followed approximately six months later with a peak of microcephaly reported in the country.”
Margaret Honein, Chief of the Birth Defects Branch at the CDC and a senior author of the study. She says the finding is compelling evidence that the highest-risk period for Zika virus infection is sometime in the first half of pregnancy.
“So this both adds to the evidence and helps confirm that any country experiencing a large Zika virus outbreak should anticipate a large increase in microcephaly. This is not unique to one geographic location, such as Brazil. What we’re seeing in Colombia is very similar to what was reported in Brazil.”
The study was in the CDC’s Mortality and Morbidity Weekly Report. [Esther Liliana Cuevas et al, Preliminary Report of Microcephaly Potentially Associated with Zika Virus Infection During Pregnancy — Colombia, January–November 2016]
Honein says growing evidence now exists for an association between the virus and other defects related to a damaged central nervous system.
“These include defects like club foot, joint contractures where the joints are very, very stiff, and things like congenital deafness…and eye abnormalities.”
In the US, the most recent cases of local transmission of Zika have occurred in parts of Florida and Texas, and there are now more than 1,000 pregnancies with laboratory evidence of Zika virus infection, plus more than 2,000 more in US territories.
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