A Rabies Titer Testing is a test to check the levels of antibodies for rabies in your pet's blood stream. Essentially it is a test to check that the rabies vaccination has worked and that your pet is protected against getting or carrying rabies. An OIE Laboratory is a laboratory that is authorized by the World Organization for Animal Health to provide testing and results acceptable for international travel of pets and import to countries requiring the Titer blood test. Testing from a non OIE laboratory will not be accepted.