Fig. 2
From: A novel method to rescue and culture duck Astrovirus type 1 in vitro
IFA detection of DAstV-1. (a) The BHK-21 cells transfected with pABX-D51; (b) The BHK-21 cells transfected with pABX; (c) The DEF cells infected by the 3rd rescued virus with trypsin treatment; (d) The DEF cells infected by the 3rd rescued virus without trypsin treatment; (e) The DEF cells infected by the 6th rescued virus with trypsin treatment; (f) The DEF cells infected by the 6th rescued virus without trypsin treatment