Detection of Bisgaard Taxon 40 in Rhinoceros Auklets (Cerorhinca monocerata) with Pneumonia and Septicemia from a Mortality Event in Washington, USA

We isolated Bisgaard taxon 40 from Rhinoceros Auklets (Cerorhinca monocerata) with pneumonia and septicemia from Washington, US, found dead in 2016. Previously isolated only from the respiratory tract of a gull (Laridae), little is known about its pathogenic potential and whether it acts as a primary or opportunistic pathogen.