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Highly complex spatio-temporal environmental data sets are becoming common in ecology because of the increasing use of large-scale simulation models and automated data collection devices. The spatial and temporal dimensions present real and difficult challenges for the interpretation of these data. A particularly difficult problem is that the relationship among variables can vary in dramatically in...
Antigen-specific lymphoproliferative responses were examined in chickens following immunization with tetanus toxoid (Ttx). The immune competence of chickens was assessed by mitogen assay utilizing phytohemagglutinin (PHA)-stimulation and Ttx-specific antigen proliferation assay (Ttx-APA). Immune spleen cells but not peripheral blood leucocytes demonstrated specific proliferation following stimulation...
We investigated the potential of a herpesvirus of turkey (HVT)-based recombinant virus (rHVT) as an in ovo vaccine to protect specific-pathogen-free chickens against Newcastle disease (ND) and Marek's disease (MD). The rHVT, designed to express fusion (F) and hemagglutinin-neuraminidase (HN) glycoproteins of the lentogenic Hitchner B1 strain of ND virus (NDV), as well as glycoproteins A and B of...
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