This edition has been revised by Ineke Puls, Gert Wouter Bouwman and Gert de Lange of PTC+ , Barneveld, under the guidance of Farzin Wafadar Aqhdam. Agromisa kindly acknowledges their contributions and critical comments. We also acknowledge the financial support of the World’s Poultry Science Association, which made it possible to publish this Agrodok in several languages. A number of illustrations used in this Agrodok derive from the Net- work for Smallholder Poultry Development (‘Poultry Network’), USDA Animal and Plant Health Inspection Service (APHIS) and the Newcastle Disease Field Guide by Alders and Spradbrow (ACIAR). The nutrition tables were provided.
