Fig. 4
From: Avian keratin disorder of Alaska black-capped chickadees is associated with Poecivirus infection
Viral localization. Transverse sections of beak of BCCH displaying AKD (beak length of 18.7 mm) and infected with Poecivirus, as determined by targeted PCR followed by Sanger sequencing. Cell nuclei are stained blue with hematoxylin and RNA sequence specific probes targeting positive strand viral RNA are stained brown. Panel a) section hybridized with probe for DapB bacterial gene (negative control); b) section hybridized with probe for BCCH NADH ND2 gene (positive control); c) section hybridized with probe for Poecivirus; d) inset of Panel c