Fig. 2

PED virus detection in the small intestine and fecal samples using RT-PCR assay. Lane M; 100 bp DNA ladder. Lanes 1 and 6; a 412-bp PCR product (membrane protein of the PED virus; a positive control). Lanes 2 and 7; negative controls. Lanes 3–5; small intestine samples of the PED virus challenged piglets on d 7. Lanes 8–10; fecal samples of the PED virus challenged piglets on d 7