Deficiency of the enzyme dihydropteridine reductase (DHPR) causes a syndrome of hyperphenylalaninemia and mental retardation but is refactory to conventional dietary therapy. An antibody against sheep ...
Even though Newcastle disease virus (NDV) live vaccine strains can be applied to 1-day-old chickens, they are pathogenic to chicken embryos when given in ovo 3 days before hatch. Based on the reverse ...
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