Table 1.

Dam fecal PCR analysis

Group		DPI 3 PND 6	DPI 5 PND 8	DPI 7 PND 10	DPI 14 PND 17	DPI 18 PND 21	DPI 25 PND 28	DPI 32 PND 35	DPI 39 PND 42
A (n= 7)a	% positive	100	100	100	100	100	86	71	57
	mean ± 1 SDb	1618 ± 815	894 ± 796c	1735 ± 1135d	1596 ± 2349	7301 ± 8488	3292 ± 5704	1317 ± 1953	0.58 ± 0.89

		DPI 3 PND 16	DPI 5 PND 18	DPI 7 PND 20	DPI 8 PND 21	DPI 15 PND 28	DPI 22 PND 35	DPI 29 PND 42
B (n = 8)	% positive	100	100	100	100	100	100	63
	mean ± 1 SD	63,584 ± 80,902	85,233 ± 68,566c	60,806 ± 34,258d	10,071 ± 12,320	1763 ± 3048	724 ± 1192	2.13 ± 5.30

^aData from the dam that did not become infected were not included

^bAverage units (pg. of DNA) per fecal pellet; limit of detection is 0.04 U/fecal pellet

^c,d P < 0.05 between values with the same superscripted letter