From: Development of vaccine-induced immunity against TRT in turkeys depends remarkably on the level of maternal antibodies and the age of birds on the day of vaccination
Number of aMPV/A positive birds/total a at days post vaccination
Group
Experiment
0
3
7
14
MDA+0/V
I
0/5
5/5
2/5
MDA-0/V
III
MDA+14/V
II
MDA-14/V
IV