In the China outbreak, PEDV caused severe diarrheal disease in piglets; heavy economic losses in many provinces resulted, despite use of commercial vaccines (inactivated Phylogenic analysis showed that strain CV777 did not cluster with current common strains and showed 4) . To our knowledge, fecal-oral transmission is probably the main or only route of PEDV transmission (5) (6) (7) . In our study, if a fecal sample from a sick piglet was found to be positive for PEDV, we also collected and studied milk from its mother. These results showed that PEDV was present in sow milk (online Technical Appendix Table 3 ), but the detection rate was lower for these samples (40.8%) than for the fecal samples (82.0%).