Table 2. Antibody positive rates against MG or MS in broiler breeders of a Korea integration company by age
Year
Positive rates of MG/MS by age (week)
30
40
50
60
2016
82.2
81.6
100
96.8
2017
20.8
52.4
56.1
34.6
2018
0.1
0
1
0