Effect of Porcine circovirus 2 (PCV-2) maternally derived antibodies on performance and PCV-2 viremia in vaccinated piglets under field conditions

Table 1 Mean of ADWG (kg/day) ± SEM for each of the four studies analysed

Treatment	Southern Germany [1]	Northern Germany [28]	United Kingdom [29]	France [30]
Placebo animals (n = 2728)	0.61 ± 0.01 ^a (n = 654)	0.65 ± 0.01 ^a (n = 706)	0.56 ± 0.01 ^a (n = 657)	0.66 ± 0.01 ^a (n = 711)
Vaccinated animals (n = 2835)	0.64 ± 0.01 ^b (n = 677)	0.67 ± 0.01 ^b (n = 718)	0.61 ± 0.01 ^b (n = 718)	0.68 ± 0.01 ^b (n = 722)
ADWG difference between groups (g/day)	30	20	50	20

n: number of animals. ^a,b Different letters in the same column indicate significant differences (p < 0.05). Only the surviving animals per treatment group were used

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