[CentOS] win32:tenga on samba share

I have a box set up for home use, but it was used as a massive file share for a bunch of friends. I only allowed 3 accounts to this share with password. I believe over time someone loaded a file that had the win32:Tenga virus on it. I usually clean the files and download what I need but I leave the files on the Share. I have lots of directories and files on this. I have been using Trend Micro from a remote windows box to clean them periodically but for some reason it rears it ugly head every once and a while. What can I do to permanently get rid of this annoying virus?? Thanks

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