Description  Claims  Cited references 

US5256415A   [0003] 
US8183026B   [0007] 
US20100104594A   [0007] 
US20110212132A   [0007] 

Infect. Immun.   [0002] 
JAVMA   [0003] 
Can. J. Comp. Med.   [0003] 
AJVR   [0003] 
AJVR   [0003] 
Infection and Immunity   [0007] 
Vaccine   [0012]