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  • Title: Cell-mediated immunity in Marek's disease: cytotoxic responses in resistant and susceptible chickens and relation to disease.
    Author: Confer AW, Adldinger HK.
    Journal: Am J Vet Res; 1980 Mar; 41(3):307-12. PubMed ID: 6445171.
    Abstract:
    Two experiments were conducted to study the cell-mediated cytotoxicity of peripheral blood leukocytes (PBL) from chickens inoculated with Marek's disease virus (MDV) against a Marek's disease-derived lymphoblastoid cell line (MSB-1) and to associate the cytotoxicity with incidence of disease. In experiment I, moderately susceptible random-bred, specific-pathogen-free chickens were inoculated with MDV (group 1), vaccinated with a herpesvirus of turkeys (HVT) and inoculated with MDV (group 2), vaccinated with HVT and inoculated with chicken kidney cells (CKC; group 3), and inoculated with CKC only (group 4). Cytotoxic activity in the PBL was detected initially during the first week after MDV inoculation and periodically throughout the observation period (groups 1, 2, and 3). Throughout the observation period, the magnitude of cytotoxic activity was similar in PBL from groups 1 and 2 chickens. The PBL from both surviving and fatally infected chickens (groups 1 and 2) were similarly cytotoxic when sampled during the first 16 days after MDV inoculation. In experiment II, inbred genetically susceptible (line 7) and resistant (line 6) chickens were used. Cytotoxic activity of PBL of significantly greater magnitude was associated with a lower mortality or incidence of gross lesions (or both) in MDV-inoculated line 6 (group B) and HVT-vaccinated and MDV-inoculated line 7 (group C) chickens compared with activity of PBL from MDV-inoculated line 7 (group A) chickens. The cytotoxic activity of PBL from individual inbred chickens did not correlate with the outcome of the infection.
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