Increased frequency of porcine epidemic diarrhea virus shedding and lesions in suckling pigs compared to nursery pigs and protective immunity in nursery pigs after homologous re-challenge

Table 2 Percentage of pigs with diarrhea and percentage of PEDV RNA positive rectal swabs

dpi	Percentage of pigs with diarrhea (positive/total number animals, median fecal consistence of pigs with diarrhea)		Percentage of PEDV RNA positive rectal swabs (positive/total number animals, mean log genomic copies per positive rectal swab ± SD)
dpi	10 day-old pigs	8 week-old pigs	10 day-old pigs	8 week-old pigs
1	4.6%^A,1 (2/43, 2)	0/43^A	18.6%^a,2 (8/43, 4.9 ± 1.7)	18.7^a (9/48, 5.4 ± 1.3)
2	18.6%^A (8/43, 2)	7.5%^A (3/40, 2)	97.6%^a (42/43, 5.7 ± 1.6)	74.4^b (32/43, 6.1 ± 2.1)
3	23.2%^A (10/43, 3)	6.6%^B (2/30, 2.5)	100%^a (43/43, 7.1 ± 0.8)	88.3^b (38/43, 6.6 ± 1.9)
4	18.6%^A (13/38, 2)	13.3%^B (4/30, 2.5)	100%^a (38/38, 7.1 ± 1.0)	100^a (20/20, 7.5 ± 0.9)
14	0/33^A	0/20^A	60.6%^a (20/33, 4.1 ± 1.1)	45.0^a (9/20, 3.6 ± 0.7)

¹Different uppercase font superscripts ^(A,B) indicate differences (P = 0.05) in the number of positive animals in the two age groups on a certain dpi.
²Different regular font superscripts ^(a,b) indicate differences (P < 0.05) in the number of positive animals in the two age groups on a certain dpi. There was no difference between the mean log₁₀ genomic copies per positive rectal swabs between age groups.

ISSN: 1297-9716