The mechanisms of PDCoV induced cell death in vivo and in vitro were unknown.
No PDCoV-infected enterocytes in vivo showed positive TUNEL staining.
TUNEL-positive signals (apoptotic nuclear fragmentation) were found in infected LLC-PK and ST cells that also showed cytopathic effects.
PDCoV does not induce apoptosis in infected enterocytes in vivo, but in LLC-PK and ST cells in vitro.
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