This is from another Freep thread.
CDC: Woman may have gotten Ebola after sex with survivor
Washington Examiner ^ | May 1, 2015 | Robert King
http://www.freerepublic.com/focus/f-news/3285577/posts
and from the replies to the thread —
Here is the reference:
http://www.ncbi.nlm.nih.gov/pubmed/9988181
In the table, the 82 day seminal fluid sample contained virus that was cultured in cells, meaning it was active. Several other samples only contained RNA, but did not infect cells.