Antibody response of susceptible and resistant chickens (Type-II leukosis) infected with JM and JM-V leukosis strains and herpesvirus of turkeys (HVT)

Experiments were carried out to: 1) investigate the differences in antibody response of chickens to different leukosis antigens (JM, JMV, JMV-A), as well as HVT; and 2) to determine the differences in antibody response between susceptible (P-line) and resistant (N-line) chickens to these antigens by means of the serum-neutralization test. Cell-free JMV and chicken-embryo-modified JMV-A leukosis strains stimulated chickens (both P- and N-line) to produce significantly (P