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Zika may have been sexually transmitted in 14 cases

Zika may have been sexually transmitted in 14 casesU.S. health officials are investigating 14 reports of the Zika virus that may been transmitted through sex, including to several pregnant women, raising new questions about the role sexual transmission is playing in the growing outbreak.

In two of the suspected cases, the infection has been confirmed in women whose only known risk factor was sexual contact with an infected male partner who had recently traveled to an area with active Zika transmission through mosquito bites, the Centers for Disease Control and Prevention said on Tuesday.

Most experts had believed that sexual transmission of Zika was rare, but the new alert suggests sexual transmission of Zika may be more of a factor than previously thought.

"We think mosquito-borne spread is the most common route of transmission, but we want to make people aware that sexual transmission is also a risk," Jennifer McQuiston, deputy incident manager for CDC's Zika response, said in a telephone interview.

McQuiston said the CDC is investigating the new reports of sexual transmission with the help of state public health departments. In addition to the confirmed cases, the CDC has preliminary test results on four women and the remaining eight cases are in varying degrees of investigation.

All of the newly reported cases of sexual transmission have occurred within the United States. So far, there have been no reports of women transmitting Zika to male sex partners. In a recent study, British researchers reported evidence of the Zika virus in semen of a 68-year-old as long as 62 days after he was first infected.

Zika virus infection generally causes mild symptoms, but it may be linked to thousands of cases of birth defects in Brazil known as microcephaly, which is marked by undersized heads and underdeveloped brains. There is no cure or treatment for Zika infection.

For pregnant women, the CDC recommends that if a male partner has traveled to an area of active Zika transmission that couples use a condom correctly and consistently for the duration of the pregnancy, or to abstain from sex entirely.

Source: Reuters
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