Coryza has not been known to occur in Maine and the source of the infection of the current outbreaks is not known at this time. The major risk factors are infected birds. Started pullets originating from infected pullet flocks or areas where the infection is present are the greatest risk for egg laying farms. Depopulated premises should be cleaned and disinfected and left vacant for 2- 3 weeks. Therefore, personnel working on poultry farms should not keep any poultry at home.
People can transmit the infection after handling sick or dead birds.
People picking up spent fowl should be allowed into poultry houses only with appropriate biosecurity precautions. Unauthorized person should be kept out. Maintenance personnel should be trained in and equipped for biosecurity. Barn doors and hallway fire doors should be kept closed. It is not practical for multiple age farms or areas where the disease is endemic.