NIS did a full system scan and declared many important QPID DLL files to be Suspicious.Cloud.7.F viruses. These include:
mssql_stored.dll, msclfs_stored.dll, test_stored.dll, stored.dll, had.dll, replication_exchanged.dll, replication_listener.dll, boost_filesystem-vc100-mt-gd-1_47.dll, boost_math_c99l-vc100-mt-gd-1_47.dll
Without much analysis it looks like NIS is picking on vc100 (Visual Studio 2010) debug files.
This finally explains the bit rot that my development environment occasionally suffers.