As for the current list of approved anti-virus solutions:

ZoneAlarm, Vipre Antivirus, TrendMicro Corp, TrendMicro, Symantec Corp, Symantec, SpySweeper AV, Sophos, SecureIT, PC Tools, Panda, NOD32, Microsoft Security Essentials, Microsoft SCEP, Microsoft OneCare, McAfee NA, McAfee 45, McAfee, Malwarebytes, LightSpeed, Landesk, Kaspersky, Iolo, Immunet, Gdata, F-Secure, Fortinet, Faronics, EZ Antivirus, Comodo, AVGuard, AVG, Avast, Authentium

TrendMicro for Mac, Sophos for Mac, Panda for Mac, Norton for Mac, McAfee for Mac, MacKeeper for Mac,Kaspersky for Mac,Intego for Mac,iAntiVirus for Mac,ClamXav for Mac,BitDefender, Avast for Mac

More info on virus check.

http://www.cert.org/