New risk found: Downloader.Dromedan.

Hi,

I'm receiving a New Risk Found Notification on a daily basis, and I can't seem to find what's infected. The message refers to a detection found 04\08\2014, and is coming from a Mac. I did several full scans, including any USB backup disks the user has connected, but nothing is found. Quarantine folder is empty, and for testing purposes has been recreated. The file the report refers to isn't present anyway.

I'm puzzled as to why this detection is reported each day, and I would like to silence this particular notification assuming it's a false detection. Any advice?

Thanks.