A field operations center is established near the farm. The field operations leader extends the quarantine area, with size depending on animal and human population density and weather conditions . A national response team from the USDA may also arrive. Biosecurity measures are set up on the farm and in the quarantine area. This may include disinfecting vehicles on roadways in either direction.
Infected herd is killed and disposed of by burning or burial on site.
Diagnosis and inspection team examines all herds and flocks in the quarantine area. If other infected herds or flocks are found, they will also be slaughtered. Epidemiologist conducts study to trace source of infection and animal movements out of the area prior to infection. Field operations leader submits appraisals of animals killed, to determine indemnity payments to owners. Epidemiological study and diagnosis continues until it is clear no additional cases are occurring.