Okazaki W, Fadly A, Burmester B R, Chase W B, Crittenden L B
Avian Dis. 1980 Apr-Jun;24(2):474-80.
Chickens contact-exposed to lymphoid leukosis virus at various ages up to 32 weeks responded with relatively high rates of infection as determined by the presence of neutralizing antibody. Virus shedding as determined by cloacal swab and albumen testing occurred in 7 of 8 groups of such chickens, but the incidence was 10% or less and sporadic. Vaccination of chickens immediately before exposure with a low pathogenicity virus of subgroup A at 8 weeks of age did not eliminate subsequent shedding.
在32周龄之前的不同年龄段通过接触感染淋巴细胞性白血病病毒的鸡，根据中和抗体的存在情况判断，其感染率相对较高。通过泄殖腔拭子和蛋白检测确定，8组此类鸡中有7组出现了病毒 shedding，但发生率为10%或更低且为散发性。在8周龄时用A亚群低致病性病毒在接触前立即对鸡进行疫苗接种，并不能消除随后的病毒 shedding。
