https://www.aphis.usda.gov/livestock-poultry-disease/avian/defend-the-flock

USDA. Animal and Plant Health Inspection Service.

APHIS offers the Defend the Flock education program to provide the tools and resources you need to make sure that you are doing everything possible to keep your birds healthy and reduce the risk that an infectious disease will spread from your property to other flocks. Biosecurity is the key to keeping our Nation’s poultry healthy!

https://www.aphis.usda.gov/livestock-poultry-disease/avian/defend-the-flock/res…

USDA. Animal and Plant Health Inspection Service.

The Defend the Flock program provides information and resources from USDA and other experts for keeping poultry healthy. It includes practical tips from growers like you, veterinarians, state agencies, scientists, and industry professionals for practicing biosecurity every day. Biosecurity is a team effort. We have to work together to defend our nation’s flocks. Resources include information needed to practice good biosecurity is available here -- checklists, resource guides, videos, and other tools.

https://www.dpird.wa.gov.au/businesses/biosecurity/animal-biosecurity/monitorin…

Western Australia Department of Primary Industries and Regional Development. Agriculture and Food Division.

https://animalhealthaustralia.com.au/newcastle-disease-management/

Animal Health Australia.

See also: Australia National Newcastle Disease Management Plan (2020) [PDF, 427 KB).