Clinical signs or syndrome (including death)- Indirect indicators (e.g. drug sales, production or performance information, abattoir sub missions)- Gross pathology- Laboratory test for pathogens or toxins- Laboratory test for host response (e.g. serology)- Specified diagnostic criteria (e.g. diagnostic codes (Veterinary Investigation Diagnosis and Analysis( VIDA )) code used in GB early warning s urveillance system)- Risk factor(s)