Effects of parental immunity and method of vaccination were studied in broiler chickens vaccinated with a commercial LaSota vaccine and challenged with the Fontana strain of velogenic viscerotropic Newcastle disease (VVND). Immunity was satisfactory from all methods of vaccination used.
Summary
An incompatibility has been shown to exist between certain avian antibody-antigen complexes and C′1 of guinea pig complement. This can be remedied by the substitution of species specific C′1 after which guinea pig C′2, C′3 and C′4 are fixed.
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