STUDY OF THE VIROLOGICAL STATUS OF A COW SEROPOSITIVE AGAINST BOVINE HERPESVIRUS TYPE-1 AND SERONEGATIVE AGAINST GE GLYCOPROTEIN

Marker vaccines aiming to facilitate infectious bovine rhinotracheitis (IBR) control are now available. These vaccines are deleted in the ge ne encoding glycoprotein gE of bovine herpesvirus type 1 (BHV-1). They allows a serological differentiation between vaccinated cattle (IBR+, gE-) and cattle naturally infected or vaccinated with a non marker va ccine (IBR+, gE+). This paper deals with the case of a cow, which, alt hough never vaccinated, possessed the same serological response as cat tle vaccinated with a marker vaccine (IBR+, gE-).