EI is listed in the World Organisation for Animal Health (OIE) Terrestrial Animal Health Code and countries are obliged to report the occurrence of disease according to the OIE Code. In UK, EI is not notifiable to Defra but it is notifiable to the British Horseracing Authority, under their Rules of Racing (Part 3, 30), when it occurs in horses on licensed racehorse premises, because of its potential to interrupt the racing calendar.
