A scanning
electron micrograph of the Ebola virus. Credit: Cynthia Goldsmith | CDC; Image source: livescience.com
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Survivors of Ebola are
being encouraged to use condoms until there is a better understanding of a
study that showed the virus lingers in semen for up to nine
months. The
World Health Organization (WHO) has said sexual transmission of Ebola
is "rare" and pointed to areas of Sierra Leone that have
very high numbers of survivors and yet have had no recurrences.
But WHO
head Margaret Chan told the BBC there were still questions: "Does
it mean they are still infectious or are they just fragments? We don't have the
definitive evidence yet. The
degree of uncertainty is worrying, that's why we need to take precautionary
measures, so we advise survivors to take protection through
contraception."
Dr Adam Kamradt-Scott, from
the University of Sydney, told the BBC’s Newsday programme the discovery
could cause survivors to be further ostracized.
Ebola Survivors Should Use Condoms
Indefinitely, CDC Says
LIVESCIENCE reports:
The Ebola virus can
remain in semen for longer than previously thought, and so men who survive the
disease should always use a condom during sex until more information is known,
the Centers for Disease Control and Prevention says. This new recommendation follows
the report of a woman in Liberia who may have contracted Ebola through sex with
a man who had survived the disease.
The
woman, who developed Ebola in mid-March, had not had contact with anyone with
Ebola symptoms, and hadn't traveled to other areas where people have Ebola. But
about a week before her symptoms began, she had unprotected sex with a man who
had survived Ebola.
Although
the man had been declared Ebola-free six months earlier, in October 2014, a
sample of his semen taken in late March of this year found genetic material
from the Ebola virus. What's more, when researchers looked at part of the
genetic sequence of the Ebola virus in the man's semen, this part matched the
Ebola virus found in the woman, according to a new report of the case.
The
researchers can't say for certain that the woman caught Ebola through sex, but
the information they have so far suggest that it's possible, they said.
There
has been just one other report of a person who possibly contracted Ebola
through sex — the case occurred during a 1995 Ebola outbreak in the Democratic
Republic of the Congo — but this report was also not conclusive.
Researchers
knew that the Ebola virus could survive for months in semen, and have
previously recommended that Ebola survivors either abstain from sex or use a
condom for at least three months following their illness.
But
the new report suggests that the man transmitted Ebola through sex about five
months after he recovered, and nearly 200 days after he first showed Ebola
symptoms.
"To
prevent transmission of Ebola, contact with semen from male survivors should be
avoided," the researchers wrote in the report, published today (May 1) in
the journal Morbidity and Mortality Weekly Report. "If male survivors have
sex (oral, vaginal or anal), a condom should be used correctly and consistently
every time until further information is known."
Additional
studies are now planned to determine how long the Ebola virus stays in the
bodily fluids of survivors, to better understand the risk of Ebola spread
through sex, the researchers said.
Still, if Ebola is transmitted through sex, it's not known how often it happens. The Ebola survivor in the report also had sex with another woman during February and March, but she did not contract Ebola, the report said.
Still, if Ebola is transmitted through sex, it's not known how often it happens. The Ebola survivor in the report also had sex with another woman during February and March, but she did not contract Ebola, the report said.
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