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  • Title: Immunization against Marek's disease transplantable cell lines.
    Author: Nazerian K, Witter RL.
    Journal: Avian Dis; 1984; 28(1):160-7. PubMed ID: 6326737.
    Abstract:
    Continuous passage of MDCC-RP1, a highly tumorigenic Marek's disease (MD) lymphoblastoid cell line, in cell culture resulted in a gradual loss in ability of the cell line to cause progressive tumors in susceptible day-old chicks. Inoculation of day-old chicks with high-cell-culture-passaged (187th to 417th) nontumorigenic MDCC-RP1 cells gave excellent protection against challenge at 8 days with low-passaged tumorigenic MDCC-RP1 cells but failed to protect against primary tumors caused by inoculation with MD virus. Vaccination with the herpesvirus of turkeys, on the other hand, protected the chickens well against primary tumors caused by MD virus and against transplantable tumors caused by tumorigenic MDCC-RP1 cells, but it did not protect as well against another MD lymphoblastoid cell line, MDCC-RP4. It is unlikely, therefore, that vaccines prepared from passaged MDCC-RP1 cell lines will have value for protecting chickens against MD in the field.
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