Updated interim guidelines for preventing transmission of Zika virus include an expanded window for testing women with potential Zika virus infection and an extension of guidelines for preventing sexual exposure, said CDC officials.
Providers can now use real-time reverse transcription-polymerase chain reaction (rRT-PCR) testing to detect Zika virus in a patient's blood for up to 14 days, which is an increase from the prior 7-day window.
"To increase the proportion of pregnant women with Zika virus infection who receive a definitive diagnosis, CDC recommends expanding [rRT-PCR] testing," CDC officials wrote in a special edition of the Morbidity and Mortality Weekly Report.
In addition, this test may potentially be used after a pregnant woman has a positive IgM test, even if it is outside the 14-day window.
In a separate issue of the Morbidity and Mortality Weekly Report, the CDC expanded guidance on sexual transmission of Zika virus to include sexual transmission from contact with a female sex partner. Given the recent case of apparent female-to-male transmission, the guidelines on sexual transmission have been updated to include any form of sexual contact without a barrier method with any male or female who has traveled to or lives in an area with active Zika virus transmission.
The focus is on genital secretions, so risks for Zika transmission include unprotected vaginal, anal, and oral sex, as well as potentially the sharing of sex toys. The guidance covers both pregnant heterosexual couples as well as pregnant women with female sex partners.
A full list of updated recommendations is available on the CDC Web site.
CDC Updates Zika Guidance for Pregnant Women
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