MMWR: Pregnancy Outcomes Following Zika Virus Infection during Pregnancy in the U.S. Territories, January 15, 2016 – April 25, 2017

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MMWR: Pregnancy Outcomes Following Zika Virus Infection during Pregnancy in the U.S. Territories, January 15, 2016 – April 25, 2017

Last week, CDC released a report in MMWR providing new information on 2,549 cases of pregnant women with possible Zika virus infection who completed their pregnancies in the U.S. territories.  Data from January 1, 2016 to April 25, 2017 were reported to the U.S. Zika Pregnancy Registry and the Puerto Rico Zika Active Pregnancy Surveillance System from American Samoa, Commonwealth of Puerto Rico, Federated States of Micronesia, Republic of Marshall Islands, and the U.S. Virgin Islands.  This report is the first from the U.S. territories to provide results of an analysis of data reported to the Zika pregnancy and infant registries.  Also, this report represents the largest number of completed pregnancies with laboratory confirmation of Zika virus infection to date.

Key findings include the following:

  • Nearly 1,508 women had confirmed Zika virus infection, and 5% of their fetuses and infants had birth defects potentially associated with Zika virus infection.
  • Eight percent with confirmed infection in the first trimester had fetuses or infants with birth defects, compared to 5% and 4% in the second and third trimesters, respectively.
  • Of the 2,464 live-born infants, 59% had testing reported for Zika virus infection, 52% were reported to have received head imaging and 79% had a reported hearing screening at birth.

The news report and press release can be found here,  “CDC analysis of data from US territories finds serious birth defects in about 1 in 12 fetuses or infants of pregnant women with Zika infection in the first trimester.

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