Bollen L
Tijdschr Diergeneeskd. 1979 Dec 15;104(24):986-7.
In flocks of broiler chickens showing a high incidence of I.B. infection, double vaccination against I.B. with the H120 strain on the first and 18th-20th day of life, will prevent the disease, and the results of fattening will be improved.
在传染性支气管炎(I.B.)感染发病率高的肉鸡群中,在雏鸡1日龄和18 - 20日龄时用H120株对I.B.进行两次疫苗接种,可预防该病,并能提高育肥效果。