Feeding sentinels: Logics of care and biosecurity in farms and labs.

This article compares the treatment of living beings (unvaccinated chickens and infected cells) considered as sentinel devices in a farm and in a lab in Hong Kong. Sentinel devices are defined as living beings posted on a boundary from which they send signals of invisible threats. The ethnography looks at how they transform differences between ordinary lives and lives exposed, between good death and bad death, through the practices of those who feed them. In farms and labs exposed to Avian Influenza viruses, the logic of biosecurity intersects with a logic of care, blurring the distinction between self and other, friend and enemy through aesthetic judgments concerning what is a 'good death'. Metabolism and immunity are redefined when sentinels are fed to produce clear signals of the mutations of viruses.