Pasteurella Multocida Vaccine, Avian Isolate, shall be prepared as a desiccated live culture of an avirulent VerDate Sep<11>2014 09:18 Apr 20, 2015 Jkt 235028 PO 00000 Frm 00751 Fmt 8010 Sfmt 8010 Y:\SGML\235028.XXX 235028 rmajette on DSK2VPTVN1PROD with or modified strain of Pasteurella multocida. Only Master Seed which has been established as pure, safe, and immunogenic shall be used for vaccine production.