Avian influenza is considered a "global threat" and a biosecurity issue. How did that come to be? How did the avian influenza threat change as the virus spread? This book offers detailed, empirical accounts of avian influenza as the virus - and the knowledge about it - spread beyond Asia from 2005 onwards. It also offers insights into how the concept biosecurity has emerged in relation to recent disease outbreaks. Based on multi-sited fieldwork in Turkey and textual analyses this book contributes to new ways of understanding text and field, the global and the local, and the secure and the insecure as relational rather than opposed or unconnected; as enacted rather than pre-given.