Etrust 8.1 Lotus Notes Option

We are presently using Computer Associates Etrust 8.1 Lotus Notes Option for virus checking. I knew that it was supported for Domino 8, but I find out now that this does not include 8.5. I have upgraded to 8.5. We have a Barracuda appliance that prescans for SPAM and viruses before it get to the server. However does anyone have a suggestion concerning how the Etrust will scan the attachments or what Virus server scanner is recommended for 8.5.Is uninstalling 8.5 a reasonable option?

Thanks for your time.

JA