RESTRICTION-ENDONUCLEASE ANALYSIS OF A PORCINE ISOLATE OF BOVINE HERPESVIRUS TYPE-1

Deoxyribonucleic acid (DNA) was extracted from bovine herpesvirus type 1 (BHV-1) isolated from a stillborn porcine fetus, from the Cooper re ference strain of BHV-1, and from an Ontario bovine respiratory isolat e. Each DNA was digested with the restriction endonucleases HindIII, E coRI, HpaI and BamHI. Except for very minor differences in the pattern s produced after digestion with EcoRI and HindIII, the DNA of the porc ine isolate reacted in a similar manner to the bovine viruses, and it was concluded that the porcine virus is genetically similar to bovine isolates of BHV-1.