Studies on the Protective Value of Newcastle-Immune Serum and Gamma Globulin Against Artificially Induced Newcastle Disease of Chickens

Synthesis and Symptomology of Newcastle Disease Virus Under Controlled Conditions

“…The low recovery of virus from sick birds may represent cessation of virus synthesis plus moderately efficient clearance time (15). The congenital passive immunity effects were essentially similar to those reported by Nadel (16), R ichey (20) and V asington (21). These results extend their findings by specific plaque neutralization determinations in con junction with direct challenge studies.…”

Vaccination of Congenitally-Immune Chicks against Newcastle Disease Virus

“…Levels of congenital immunity in commercial hatches are rarely this high and, moreover, this protection is shortlived. Recently, interest has been revived in the prophylactic utility of both convalescent NDV-immune serum and 7-globulins from fractionated antisera (8). Passive immunity conferred by these preparations is frequently incomplete, particularly when challenged with highly virulent (velogenic) strains of NDV.…”

Studies on the immune response to Newcastle disease virus in poultry

“…The role of humoral immunity against lethal infections of chickens with NDV has been reported (Umino et al, 1987;Vasington et al, 1960;Wills and Luginbuhl, 1963). It has been found that chickens inoculated with egg yolk or plasma from hyperimmunized birds raised against NDV were protected when challenged after three weeks of administration (Vasington et al, 1960;Wills and Luginbuhl, 1963).…”