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New York - Zika Ravages Testes Of Mice; Study Raises Concern About Men

Published on: October 31, 2016 08:00 PM
By: AP
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FILE - In this Jan. 27, 2016, file photo, an Aedes aegypti mosquito known to carry the Zika virus, is photographed through a microscope at the Fiocruz institute in Recife, Pernambuco state, Brazil. Zika virus ravages the testes of male mice, sharply reducing sperm counts and fertility, said a study that raises a new specter about its threat to people. The mouse results appear in a paper released Monday, Oct. 31, by the journal Nature. (AP Photo/Felipe Dana, File)FILE - In this Jan. 27, 2016, file photo, an Aedes aegypti mosquito known to carry the Zika virus, is photographed through a microscope at the Fiocruz institute in Recife, Pernambuco state, Brazil. Zika virus ravages the testes of male mice, sharply reducing sperm counts and fertility, said a study that raises a new specter about its threat to people. The mouse results appear in a paper released Monday, Oct. 31, by the journal Nature. (AP Photo/Felipe Dana, File)

New York - A study in mice finds that Zika virus infection ravages male mouse testes, and sharply reduces sperm counts and fertility.

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That raises a new concern about a possibly overlooked threat to people from the virus. But experts say it’s not at all clear that the same thing happens in men.

Experiments found testes of infected mice shrank about 90 percent by weight, while their output of useful sperm fell by three-quarters on average, and often more. Researchers found that the virus attacks the anatomical structure where sperm are made and reach maturity.

Testosterone levels also fell.

The mouse results appear in a paper released Monday by the journal Nature.



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