Presentation delivered by P. Calistri (COVEPI) during the African Symposium on “Animal identification and recording (AIR) systems for traceability and livestock development in sub-Saharan Africa”. The Symposium was held in Pretoria, South Africa, on 14-16 April 2015. Subscribe! http://www.youtube.com/subscription_center?add_user=FAOoftheUN Follow #UNFAO on social media! * Facebook - https://www.facebook.com/UNFAO * Google+ - https://plus.google.com/+UNFAO * Instagram - https://instagram.com/unfao/ * LinkedIn - https://www.linkedin.com/company/fao * Twitter - http://www.twitter.com/faoknowledge © FAO: http://www.fao.org