Some studies on infectious bovine rhinotrachitis in cattle

Bovine herpes virus-I has been known since many years ago to beone the aetiological viral agents causing respiratory as well as genitaldiseases. The percentage of the disease occurrence in some govemorates ofEgypt was studied and Vaccines were used for the control of this disease. A comparative study between the IBR freeze dried inactivated vaccme and the prepared alum gel adsorbed, formalin inactivated IBR vaccine was carried out. Using Serum Neutralization 36.7% --I- ve in Alexandria Governorate 43.75% --I- ve in Dammietta Governorate All sera samples were taken from non vaccinated animals. An alum gel’ adsorbed, formalin inactivated IBR vaccine (Abou Hammad Strain) was prepared and titrated according to Ma