现有商业疫苗通过母猪免疫能有效控制新生仔猪大肠杆菌性腹泻，而对PWD却难以奏效。
The existing commercial vaccines could effectively control diarrhea caused by E. coli in newborn piglets from immuning sow, while it was unlikely effective to PWD.
现有商业疫苗通过母猪免疫能有效控制新生仔猪大肠杆菌性腹泻，而对PWD却难以奏效。
The existing commercial vaccines could effectively control diarrhea caused by E. coli in newborn piglets from immuning sow, while it was unlikely effective to PWD.
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