Studies of a polymorphic Ehrlichia ruminantium gene for use as a component of a recombinant vaccine against heartwater.
Pretorius
A
A
ARC Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort 0110, South Africa. PretoriusAL@arc.agric.za
Liebenberg
J
J
Louw
E
E
Collins
N E
NE
Allsopp
B A
BA