Table 2 Effects of dietary supplementations of 100 ppm of ZnO without (BASAL) or with 120 ppm of apramycin (ANTIBIO), 2,500 ppm of ZnO (HIGH), and 100 ppm of the lipid-encapsulated ZnO (LE) on clinical signs of post-weaning pigs challenged with 5 × 10 ⁸  cfu of ETEC K88

D 0

38.48

38.52

38.50

38.48

0.15^x

D 1

39.85^a

39.47^ab

39.22^b

39.57^ab

D 4

40.08^a

39.43^bc

39.22^c

39.63^b

D 7

39.75^a

39.32^b

38.98^bc

38.85^c

Overall¹

39.54^a

39.18^b

38.98^b

39.13^b

0.10

<0.01

D 0

1.50

1.67

1.83

1.50

D 1

2.83

2.67

2.33

2.50

D 2

2.67

2.83

2.33

2.50

0.22^x

D 4

2.50^a

2.17^a

2.17^a

1.50^b

D 7

2.50^a

1.83^b

1.67^b

1.67^b

Overall³

2.40^a

2.23^ab

2.07^b

1.93^b

0.11

0.04

D 1

7.00^a

5.90^b

5.35^b

5.58^b

D 4

6.86^a

5.71^b

5.22^bc

4.83^c

0.29^x

D 7

7.33^a

5.50^b

4.91^bc

4.25^c

Overall⁴

7.06^a

5.70^b

5.16^b

4.89^b

0.33

<0.01